new-1.1

src/main/java/com/io/yutian/elementoriginlib/ElementOriginLib.java

@@ -26,7 +26,7 @@ public final class ElementOriginLib extends JavaPlugin {
     public void onEnable() {
         instance = this;
 
-        loadLibraries();
+//        loadLibraries();
 
         new GuiHandlerListener(this);
         new PlayerChatInputListener(this);
@@ -49,7 +49,7 @@ public final class ElementOriginLib extends JavaPlugin {
         LibraryManager libraryManager = new BukkitLibraryManager(this);
         libraryManager.addMavenCentral();
         libraryManager.setLogLevel(LogLevel.WARN);
-        libraryManager.loadLibrary(Library.builder().groupId("org{}apache{}commons").artifactId("commons-compress").version("1.27.1").build());
+//        libraryManager.loadLibrary(Library.builder().groupId("org{}apache{}commons").artifactId("commons-compress").version("1.27.1").build());
 //        libraryManager.loadLibrary(Library.builder().groupId("com{}github{}luben").artifactId("zstd-jni").version("1.5.6-9").build());
 //        libraryManager.loadLibrary(Library.builder().groupId("com{}zaxxer").artifactId("HikariCP").version("6.2.1").build());
 //        libraryManager.loadLibrary(Library.builder().groupId("org{}xerial").artifactId("sqlite-jdbc").version("3.46.0.0").build());

src/main/java/com/io/yutian/elementoriginlib/command/CommandEntity.java

@@ -3,13 +3,13 @@ package com.io.yutian.elementoriginlib.command;
 import com.io.yutian.elementoriginlib.command.argument.Argument;
 import com.io.yutian.elementoriginlib.command.argument.ArgumentType;
 import com.io.yutian.elementoriginlib.command.interfaces.Command;
-import com.io.yutian.elementoriginlib.command.interfaces.CommandArgument;
+import com.io.yutian.elementoriginlib.command.interfaces.Parameter;
 import com.io.yutian.elementoriginlib.command.interfaces.SubCommand;
-import com.io.yutian.elementoriginlib.exception.command.CommandRegisterException;
+import com.io.yutian.elementoriginlib.exception.command.CommandParseException;
 import com.io.yutian.elementoriginlib.logger.Logger;
+import org.bukkit.command.CommandSender;
 
 import java.lang.reflect.Method;
-import java.lang.reflect.Parameter;
 import java.util.*;
 
 public class CommandEntity {
@@ -50,23 +50,37 @@ public class CommandEntity {
         return childrens;
     }
 
-    public static CommandEntity parseFromClass(Class clazz) {
+    public boolean canInvoke(CommandSender sender) {
+        if (childrens.size() == 1 && childrens.get(0).isNodal()) {
+            CommandEntry child = childrens.get(0);
+            return child.canInvoke(sender);
+        }
+        return true;
+    }
+
+    public boolean hasPermission(CommandSender sender) {
+        if (childrens.size() == 1 && childrens.get(0).isNodal()) {
+            CommandEntry child = childrens.get(0);
+            return child.hasPermission(sender);
+        }
+        return sender.isOp() || sender.hasPermission(permission);
+    }
+
+    public static CommandEntity parseFromClass(Object instance, Class clazz) {
         if (clazz == null) {
-            LOGGER.warn("Class is null");
+            throw new NullPointerException("Class is null");
-            return null;
         }
         if (!clazz.isAnnotationPresent(Command.class)) {
-            LOGGER.warn("Class " + clazz.getName() + " is not annotated with @Command");
+            throw new CommandParseException("类 " + clazz + " 未标注 @Command 注解");
-            return null;
         }
 
-        Object instance;
+//        Object instance;
-        try {
+//        try {
-            instance = clazz.getConstructor(null).newInstance();
+//            instance = clazz.getConstructor(null).newInstance();
-        } catch (Exception e) {
+//        } catch (Exception e) {
-            LOGGER.warn("无法实例化类 " + clazz);
+//            e.printStackTrace();
-            return null;
+//            throw new CommandParseException("无法实例化类 "+clazz);
-        }
+//        }
 
         Command commandAnnotation = (Command) clazz.getAnnotation(Command.class);
         String command = commandAnnotation.value();
@@ -76,30 +90,41 @@ public class CommandEntity {
         Map<String, CommandEntry> pathToEntryMap = new HashMap<>();
         List<CommandEntry> rootEntries = new ArrayList<>();
 
+        List<String> allPaths = new ArrayList<>();
+
+        boolean hasNodal = false;
+
         try {
             for (Method method : clazz.getDeclaredMethods()) {
                 if (!method.isAnnotationPresent(SubCommand.class)) {
                     continue;
                 }
 
-                CommandEntry commandEntry = parseFromMethod(method);
+                CommandEntry commandEntry = parseFromMethod(clazz, method);
+                if (commandEntry.isNodal()) {
+                    if (hasNodal) {
+                        throwParseException(clazz, "命令路径冲突: 命令 '" + command + "' 不能同时出现多个无节点命令(nodal=true)");
+                    }
+                    hasNodal = true;
+                    commandEntry.setName(command);
+                }
                 if (commandEntry != null) {
-                    allEntries.add(commandEntry);
-
                     String path = commandEntry.getFullName();
-                    String parentPath = getParentPath(path);
+                    allPaths.add(path);
+                    allEntries.add(commandEntry);
+                    pathToEntryMap.put(path, commandEntry);
+                }
+            }
 
-                    if (pathToEntryMap.containsKey(path)) {
+            if (hasNodal && allEntries.size() > 1) {
-                        LOGGER.warn("命令路径冲突: 子命令 '" + path + "' 已经定义, 不能再定义父命令 '" + parentPath + "'");
+                throwParseException(clazz, "命令路径冲突: 命令 '" + command + "' 不能同时包含子命令和无节点命令(nodal=true)");
-                        throw new CommandRegisterException("命令路径冲突: 子命令 '" + path + "' 已经定义, 不能再定义父命令 '" + parentPath + "'");
+            }
-                    }
 
-                    if (!parentPath.isEmpty() && pathToEntryMap.containsKey(parentPath)) {
+            for (String path : allPaths) {
-                        LOGGER.warn("命令路径冲突: 子命令 '" + path + "' 已经定义, 不能再定义父命令 '" + parentPath + "'");
+                String parentPath = getParentPath(path);
-                        throw new CommandRegisterException("命令路径冲突: 子命令 '" + path + "' 已经定义, 不能再定义父命令 '" + parentPath + "'");
-                    }
 
-                    pathToEntryMap.put(commandEntry.getFullName(), commandEntry);
+                if (!parentPath.isEmpty() && pathToEntryMap.containsKey(parentPath)) {
+                    throwParseException(clazz, "命令路径冲突: 子命令 '" + path + "' 已经定义, 不能再定义父命令 '" + parentPath + "'");
                 }
             }
 
@@ -122,6 +147,7 @@ public class CommandEntity {
                     parentEntry.getChildrens().add(entry);
                 }
             }
+
         } catch (Exception e) {
             e.printStackTrace();
             return null;
@@ -130,6 +156,7 @@ public class CommandEntity {
         return new CommandEntity(instance, command, permission, rootEntries);
     }
 
+
     private static String getParentPath(String path) {
         int lastDotIndex = path.lastIndexOf('.');
         if (lastDotIndex == -1) {
@@ -159,17 +186,17 @@ public class CommandEntity {
     }
 
 
-    private static CommandEntry parseFromMethod(Method method) {
+    private static CommandEntry parseFromMethod(Class clazz, Method method) {
         SubCommand subCommand = method.getAnnotation(SubCommand.class);
         String path = subCommand.value();
         String permission = subCommand.permission();
+        boolean nodal = subCommand.nodal();
         String[] senderRequireArray = subCommand.senderRequire();
         List<SenderRequire> senderRequireList = new ArrayList<>();
         for (String senderRequire : senderRequireArray) {
             SenderRequire senderRequire1 = SenderRequires.get(senderRequire);
             if (senderRequire1 == null) {
-                LOGGER.warn("Sender require " + senderRequire + " is null");
+                throwParseException(clazz, "使用者权限 " + senderRequire + " 不存在");
-                continue;
             }
             senderRequireList.add(SenderRequires.get(senderRequire));
         }
@@ -179,39 +206,54 @@ public class CommandEntity {
         if (path.contains(".")) {
             int lastDotIndex = path.lastIndexOf('.');
             if (lastDotIndex == -1 || lastDotIndex > path.length() - 1) {
-                LOGGER.warn("Invalid command name '" + path + "'");
+                throwParseException(clazz, "命令名 '" + path + "' 无效");
-                return null;
             }
             subName = path.substring(path.lastIndexOf('.') + 1);
         }
         List<Argument> arguments = new ArrayList<>();
-        for (Parameter parameter : method.getParameters()) {
+        int allArgumentsCount = (int) Arrays.stream(method.getParameters())
-            if (!parameter.isAnnotationPresent(CommandArgument.class)) {
+                .filter(parameter -> parameter.isAnnotationPresent(Parameter.class))
+                .count();
+        int index = 0;
+        for (java.lang.reflect.Parameter parameter : method.getParameters()) {
+            if (!parameter.isAnnotationPresent(Parameter.class)) {
                 continue;
             }
-            CommandArgument commandArgument = parameter.getAnnotation(CommandArgument.class);
+            Parameter commandArgument = parameter.getAnnotation(Parameter.class);
             String name = commandArgument.name();
             String argumentName = name.isEmpty() ? parameter.getName() : name;
             boolean required = commandArgument.required();
+            if (!required && index < allArgumentsCount - 1) {
+                throwParseException(clazz, "可选参数仅能在最后一个位置中使用");
+            }
+            String defaultValue = commandArgument.defaultValue();
             String suggestionType = commandArgument.suggestionType();
             Class<?> type = parameter.getType();
             ArgumentType argumentType = ArgumentType.get(parameter.getType());
             if (argumentType == null) {
-                LOGGER.warn("Argument type " + parameter.getType().getName() + " is null");
+                throwParseException(clazz, "参数类型 " + parameter.getType().getName() + " 不存在");
-                continue;
             }
             Argument argument = new Argument(argumentName, argumentType);
             if (!suggestionType.isEmpty()) {
                 Suggest suggest = Suggests.getSuggest(suggestionType);
                 if (suggest == null) {
-                    LOGGER.warn("Suggest type " + suggestionType + " is null");
+                    throwParseException(clazz, "建议类型 " + parameter.getType().getName() + " 不存在");
                 } else {
                     argument.suggest(suggest);
                 }
             }
+            if (!required) {
+                argument.optional(defaultValue);
+            }
             arguments.add(argument);
+            index++;
         }
-        return new CommandEntry(path, subName, permission, senderRequireList, arguments, method);
+        return new CommandEntry(path, subName, permission, nodal, senderRequireList, arguments, method);
+    }
+
+    private static void throwParseException(Class clazz, String message) {
+        LOGGER.warn("解析命令 "+clazz+" 时出现错误");
+        throw new CommandParseException(message);
     }
 
     @Override
@@ -222,4 +264,5 @@ public class CommandEntity {
                 ", childrens=" + childrens +
                 '}';
     }
+
 }

src/main/java/com/io/yutian/elementoriginlib/command/CommandEntry.java

@@ -2,15 +2,15 @@ package com.io.yutian.elementoriginlib.command;
 
 import com.io.yutian.elementoriginlib.command.argument.Argument;
 import com.io.yutian.elementoriginlib.command.argument.ArgumentValue;
-import com.io.yutian.elementoriginlib.command.interfaces.CommandArgument;
+import com.io.yutian.elementoriginlib.command.interfaces.Parameter;
 import com.io.yutian.elementoriginlib.logger.Logger;
 import org.bukkit.command.CommandSender;
 
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.reflect.Method;
-import java.lang.reflect.Parameter;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 public class CommandEntry {
@@ -22,6 +22,8 @@ public class CommandEntry {
     private String permission;
     private List<SenderRequire> senderRequires = new ArrayList<>();
 
+    private boolean nodal;
+
     private List<Argument> arguments = new ArrayList<>();
 
     private List<CommandEntry> childrens = new ArrayList<>();
@@ -33,10 +35,11 @@ public class CommandEntry {
 
     private Class<?>[] parameterTypes;
 
-    public CommandEntry(String fullName, String name, String permission, List<SenderRequire> senderRequires, List<Argument> arguments, Method method) {
+    public CommandEntry(String fullName, String name, String permission, boolean nodal, List<SenderRequire> senderRequires, List<Argument> arguments, Method method) {
         this.fullName = fullName;
         this.name = name;
         this.permission = permission;
+        this.nodal = nodal;
         this.senderRequires = senderRequires;
         this.arguments = arguments;
         this.method = method;
@@ -75,8 +78,8 @@ public class CommandEntry {
             int argumentIndex = 0;
 
             for (int i = 0; i < parameterTypes.length; i++) {
-                Parameter parameter = method.getParameters()[i];
+                java.lang.reflect.Parameter parameter = method.getParameters()[i];
-                if (parameter.isAnnotationPresent(CommandArgument.class)) {
+                if (parameter.isAnnotationPresent(Parameter.class)) {
                     String paramName = arguments.get(argumentIndex).getName();
                     ArgumentValue argumentValue = commandContext.getArgumentsValue(paramName);
                     if (argumentValue != null) {
@@ -205,6 +208,10 @@ public class CommandEntry {
         return arguments;
     }
 
+    public boolean isNodal() {
+        return nodal;
+    }
+
     public List<CommandEntry> getChildrens() {
         return childrens;
     }
@@ -213,15 +220,24 @@ public class CommandEntry {
         return depth;
     }
 
+    public void setName(String name) {
+        this.name = name;
+    }
+
     @Override
     public String toString() {
         return "CommandEntry{" +
                 "fullName='" + fullName + '\'' +
                 ", name='" + name + '\'' +
                 ", permission='" + permission + '\'' +
+                ", senderRequires=" + senderRequires +
+                ", nodal=" + nodal +
                 ", arguments=" + arguments +
                 ", childrens=" + childrens +
+                ", depth=" + depth +
+                ", method=" + method +
+                ", methodHandle=" + methodHandle +
+                ", parameterTypes=" + Arrays.toString(parameterTypes) +
                 '}';
     }
-
 }

src/main/java/com/io/yutian/elementoriginlib/command/ICommandManager.java

@@ -6,6 +6,6 @@ public interface ICommandManager {
 
     String getName();
 
-    List<CommandEntity> getCommands();
+    List<CommandEntity> getCommandEntities();
 
 }

src/main/java/com/io/yutian/elementoriginlib/command/SimpleCommandManager.java

@@ -22,35 +22,32 @@ public class SimpleCommandManager implements ICommandManager {
     private final String name;
 
     @NotNull
-    private List<Class<?>> commandClasses = new ArrayList<>();
+    private Map<Class<?>, Object> commands = new HashMap<>();
     @NotNull
-    private List<CommandEntity> commands = new ArrayList<>();
+    private List<CommandEntity> commandEntities = new ArrayList<>();
 
 
-    public SimpleCommandManager(Plugin plugin, String name) {
+    public SimpleCommandManager(@NotNull Plugin plugin, @NotNull String name) {
-        this(plugin, name, new ArrayList<>());
-    }
-
-    public SimpleCommandManager(Plugin plugin, String name, @NotNull List<Class<?>> commandClasses) {
         this.plugin = plugin;
         this.name = name;
-        this.commandClasses = commandClasses;
     }
 
-    public void register(@NotNull Class<?> commandClass) {
+    public <T> void register(@NotNull Object instance) {
-        if (commandClass == null) {
+        if (instance == null) {
-            return;
+            throw new NullPointerException("instance is null");
         }
-        CommandEntity command = CommandEntity.parseFromClass(commandClass);
+        Class<?> instanceClass = instance.getClass();
+        CommandEntity command = CommandEntity.parseFromClass(instance, instanceClass);
         if (command == null) {
             return;
         }
-        commandClasses.add(commandClass);
+        commands.put(instanceClass, instance);
-        commands.add(command);
+        commandEntities.add(command);
     }
 
     public void unregisterAll() {
         commands.clear();
+        commandEntities.clear();
     }
 
     public void unregister(Class<?> commandClass) {
@@ -58,6 +55,7 @@ public class SimpleCommandManager implements ICommandManager {
             return;
         }
         commands.remove(commandClass);
+        commandEntities.clear();
     }
 
     public void registerPluginCommand(@NotNull String commandName) {
@@ -76,8 +74,8 @@ public class SimpleCommandManager implements ICommandManager {
 
     @NotNull
     @Override
-    public List<CommandEntity> getCommands() {
+    public List<CommandEntity> getCommandEntities() {
-        return commands;
+        return commandEntities;
     }
 
     static {

src/main/java/com/io/yutian/elementoriginlib/command/argument/Argument.java

@@ -11,14 +11,14 @@ public class Argument {
     private Suggest suggest;
 
     private boolean optional = false;
-    private Object defaultValue = null;
+    private String defaultValue = null;
 
     public Argument(String name, ArgumentType argumentsType) {
         this.name = name;
         this.argumentsType = argumentsType;
     }
 
-    public Argument optional(Object defaultValue) {
+    public Argument optional(String defaultValue) {
         optional = true;
         this.defaultValue = defaultValue;
         return this;
@@ -36,7 +36,7 @@ public class Argument {
         return optional;
     }
 
-    public Object getDefaultValue() {
+    public String getDefaultValue() {
         return defaultValue;
     }
 

src/main/java/com/io/yutian/elementoriginlib/command/argument/ArgumentNode.java

@@ -1,12 +0,0 @@
-package com.io.yutian.elementoriginlib.command.argument;
-
-public class ArgumentNode extends Argument {
-
-    private static final ArgumentType<Object> NODE = new ArgumentType<>("node", null, null);
-
-    public ArgumentNode(String name) {
-        super(name, NODE);
-    }
-
-
-}

src/main/java/com/io/yutian/elementoriginlib/command/handler/CommandHandler.java

@@ -26,7 +26,7 @@ public class CommandHandler implements CommandExecutor, TabCompleter {
             return;
         }
         String commandName = args[0];
-        Optional<CommandEntity> entityOptional = commandManager.getCommands().stream()
+        Optional<CommandEntity> entityOptional = commandManager.getCommandEntities().stream()
                 .filter(entity -> entity.getCommand().equalsIgnoreCase(commandName))
                 .findFirst();
 
@@ -36,7 +36,11 @@ public class CommandHandler implements CommandExecutor, TabCompleter {
         }
 
         CommandEntity commandEntity = entityOptional.get();
-        handleCommand(commandEntity, sender, label, args, commandEntity.getChildrens(), 1, new StringBuilder());
+        int index = 1;
+        if (commandEntity.getChildrens().size() == 1 && commandEntity.getChildrens().get(0).isNodal()) {
+            index = 0;
+        }
+        handleCommand(commandEntity, sender, label, args, commandEntity.getChildrens(), index, new StringBuilder());
     }
 
     private void handleCommand(CommandEntity commandEntity, CommandSender sender, String label, String[] args, List<CommandEntry> entries, int index, StringBuilder fullCommand) {
@@ -109,16 +113,18 @@ public class CommandHandler implements CommandExecutor, TabCompleter {
             int argIndex = startIndex + arguments.indexOf(argument);
 
             if (argIndex >= args.length) {
-                if (argument.isOptional()) {
+                if (!argument.isOptional()) {
-                    parsedArguments.put(argument.getName(), new ArgumentValue(argument.getDefaultValue()));
-                } else {
                     sender.sendMessage(Lang.get("command.short-arg", argument.getName()));
                     return null;
                 }
-                continue;
             }
 
-            String rawValue = args[argIndex];
+            String rawValue = null;
+            if (argument.isOptional() && argIndex >= args.length) {
+                rawValue = argument.getDefaultValue();
+            } else {
+                rawValue = args[argIndex];
+            }
             if (!argument.getArgumentsType().test(rawValue)) {
                 sender.sendMessage(Lang.get("command.error-arg", argIndex + 1, rawValue));
                 return null;
@@ -141,13 +147,13 @@ public class CommandHandler implements CommandExecutor, TabCompleter {
     @Override
     public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
         if (args.length == 1) {
-            return commandManager.getCommands().stream()
+            return commandManager.getCommandEntities().stream()
                     .map(CommandEntity::getCommand)
                     .collect(Collectors.toList());
         }
 
         String commandName = args[0];
-        Optional<CommandEntity> entityOptional = commandManager.getCommands().stream()
+        Optional<CommandEntity> entityOptional = commandManager.getCommandEntities().stream()
                 .filter(entity -> entity.getCommand().equalsIgnoreCase(commandName))
                 .findFirst();
 
@@ -158,15 +164,24 @@ public class CommandHandler implements CommandExecutor, TabCompleter {
         CommandEntity commandEntity = entityOptional.get();
         List<CommandEntry> entries = commandEntity.getChildrens();
 
+        if (entries.size() == 0) {
+            return Collections.emptyList();
+        }
+
         int depth = args.length;
         String currentArg = args[depth - 1];
-        return getSuggestions(sender, entries, args, 1, depth - 1, currentArg);
+
+//        int index = depth - 1;
+//        if (commandEntity.getChildrens().size() == 1 && commandEntity.getChildrens().get(0).isNodal()) {
+//            index = depth - 2;
+//        }
+        return getSuggestions(sender, entries, args, 0, depth - 1, currentArg);
     }
 
 
     private List<String> getSuggestions(CommandSender sender, List<CommandEntry> entries, String[] args, int start, int currentDepth, String currentArg) {
-        int maxDepth = -1;
         CommandEntry commandEntry = null;
+
         for (int i = start; i < currentDepth; i++) {
             String arg = args[i];
             Optional<CommandEntry> optionalEntry = entries.stream()
@@ -180,15 +195,11 @@ public class CommandHandler implements CommandExecutor, TabCompleter {
             commandEntry = optionalEntry.get();
 
             entries = commandEntry.getChildrens();
-
-            if (entries.size() > 0) {
-                maxDepth = i + 1;
-            }
         }
 
         if (entries.size() == 0) {
             List<Argument> arguments = commandEntry.getArguments();
-            int index = (int) (currentDepth - commandEntry.getDepth() - 2);
+            int index = (int) (currentDepth - commandEntry.getDepth() - 1);
             if (index >= arguments.size()) {
                 return Collections.emptyList();
             }

src/main/java/com/io/yutian/elementoriginlib/command/interfaces/Parameter.java

@@ -7,12 +7,14 @@ import java.lang.annotation.Target;
 
 @Target(ElementType.PARAMETER)
 @Retention(RetentionPolicy.RUNTIME)
-public @interface CommandArgument {
+public @interface Parameter {
 
     String name() default "";
 
     boolean required() default true;
 
+    String defaultValue() default "";
+
     String suggestionType() default "";
 
 }

src/main/java/com/io/yutian/elementoriginlib/command/interfaces/SubCommand.java

@@ -15,4 +15,6 @@ public @interface SubCommand {
 
     String[] senderRequire() default { "console", "player" };
 
+    boolean nodal() default false;
+
 }

src/main/java/com/io/yutian/elementoriginlib/command/list/CommandHelp.java

@@ -0,0 +1,126 @@
+package com.io.yutian.elementoriginlib.command.list;
+
+import com.io.yutian.elementoriginlib.command.CommandContext;
+import com.io.yutian.elementoriginlib.command.CommandEntity;
+import com.io.yutian.elementoriginlib.command.CommandEntry;
+import com.io.yutian.elementoriginlib.command.interfaces.Command;
+import com.io.yutian.elementoriginlib.command.interfaces.Parameter;
+import com.io.yutian.elementoriginlib.command.interfaces.SubCommand;
+import com.io.yutian.elementoriginlib.lang.Lang;
+import com.io.yutian.elementoriginlib.list.PageList;
+import com.io.yutian.elementoriginlib.manager.CommandManager;
+import com.io.yutian.elementoriginlib.util.ComponentBuilder;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.event.ClickEvent;
+import net.kyori.adventure.text.event.HoverEvent;
+import org.bukkit.command.CommandSender;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+@Command("help")
+public class CommandHelp {
+
+    private final static int MAX_PAGE_SIZE = 8;
+
+    private final CommandManager commandManager;
+    private final String alias;
+
+
+    public CommandHelp(CommandManager commandManager, String alias) {
+        this.commandManager = commandManager;
+        this.alias = alias;
+    }
+
+    @SubCommand(nodal = true)
+    public void help(CommandContext commandContext, @Parameter(required = false, defaultValue = "1") int page) {
+        String commandAlias = alias != null ? alias : commandContext.getLabel();
+        CommandSender sender = commandContext.getSender();
+        if (page <= 0) {
+            sender.sendMessage(Lang.get("command.help.page-error"));
+            return;
+        }
+        List<CommandEntity> commands = commandManager.getCommandEntities();
+        Stream<CommandEntity> stream = commands.stream().filter((c) -> c.hasPermission(sender) && c.canInvoke(sender));
+        List<CommandEntity> list = stream.collect(Collectors.toList());
+        PageList<CommandEntity> pageList = new PageList<>(list, MAX_PAGE_SIZE);
+        if (page > pageList.size()) {
+            sender.sendMessage(Lang.get("command.help.page-error"));
+            return;
+        }
+        sender.sendMessage(" ");
+        List<CommandEntity> commandList = pageList.getList(page);
+        sender.sendMessage("§7======[ §e§l"+commandManager.getName()+" §7]======");
+        for (CommandEntity command : commandList) {
+            StringBuilder stringBuilder = getCommandInfo(command, commandAlias);
+            sender.sendMessage(stringBuilder.toString());
+        }
+        ComponentBuilder componentBuilder = new ComponentBuilder();
+        boolean hasUpPage = page > 1;
+        boolean hasNextPage = page < pageList.size();
+        componentBuilder.add("§7=====");
+        if (hasUpPage) {
+            componentBuilder.add(" §7["+getColor(true)+"◀§7] ", ClickEvent.clickEvent(ClickEvent.Action.RUN_COMMAND, "/"+commandAlias+" help "+(page-1)), HoverEvent.hoverEvent(HoverEvent.Action.SHOW_TEXT, Component.text("§f上一页")));
+        } else {
+            componentBuilder.add(" §7["+getColor(false)+"◀§7] ");
+        }
+        componentBuilder.add("§7====");
+        componentBuilder.add("(§a"+page+"§f/§e"+pageList.size()+"§7)");
+        componentBuilder.add("§7====");
+        if (hasNextPage) {
+            componentBuilder.add(" §7["+getColor(true)+"▶§7] ", ClickEvent.clickEvent(ClickEvent.Action.RUN_COMMAND, "/"+commandAlias+" help "+(page+1)), HoverEvent.hoverEvent(HoverEvent.Action.SHOW_TEXT, Component.text("§f下一页")));
+        } else {
+            componentBuilder.add(" §7["+getColor(false)+"▶§7] ");
+        }
+        componentBuilder.add("§7=====");
+        sender.sendMessage(componentBuilder.build());
+    }
+
+    private StringBuilder getCommandInfo(CommandEntity command, String commandAlias) {
+        StringBuilder stringBuilder = new StringBuilder("§6/"+ commandAlias +" "+ command.getCommand());
+        stringBuilder.append("§f");
+        System.out.println(commandAlias);
+        if (command.getChildrens().size() > 0) {
+
+        } else {
+
+        }
+        Optional<String> optional = Lang.getOptional("command."+command.getCommand()+".description");
+        if (optional.isPresent()) {
+            stringBuilder.append(" ");
+            stringBuilder.append("§7- §f"+ optional.get());
+        }
+//        if (command.getChildrens().size() > 0) {
+//            StringBuilder sb = new StringBuilder();
+//            sb.append(" [");
+//            int i = 0;
+//            for (CommandNode node : command.getCommandNodes()) {
+//                sb.append(node.getName());
+//                if (i + 1 < command.getCommandNodes().size()) {
+//                    sb.append("/");
+//                }
+//                i++;
+//            }
+//            sb.append("]");
+//            stringBuilder.append(sb);
+//        } else {
+//            for (Argument argument : command.getArguments()) {
+//                stringBuilder.append(" ");
+//                stringBuilder.append("<"+argument.getName()+">");
+//            }
+//        }
+//        Optional<String> optional = Lang.getOptional("command."+command.getName()+".description");
+//        if (optional.isPresent()) {
+//            stringBuilder.append(" ");
+//            stringBuilder.append("§7- §f"+ optional.get());
+//        }
+        return stringBuilder;
+    }
+
+    private String getColor(boolean hasPage) {
+        return hasPage ? "§a" : "§c";
+    }
+
+}

src/main/java/com/io/yutian/elementoriginlib/command/list/CommandTest.java

@@ -3,32 +3,46 @@ package com.io.yutian.elementoriginlib.command.list;
 import com.io.yutian.elementoriginlib.command.CommandContext;
 import com.io.yutian.elementoriginlib.command.interfaces.Command;
 import com.io.yutian.elementoriginlib.command.interfaces.SubCommand;
-import com.io.yutian.elementoriginlib.command.interfaces.CommandArgument;
+import com.io.yutian.elementoriginlib.command.interfaces.Parameter;
+import com.io.yutian.elementoriginlib.item.OriginItem;
+import com.io.yutian.elementoriginlib.item.stat.ItemStats;
+import com.io.yutian.elementoriginlib.item.stat.data.StringData;
+import com.io.yutian.elementoriginlib.item.stat.list.IdStat;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
 
 @Command("test")
 public class CommandTest {
 
     @SubCommand("list")
-    public void list(CommandContext context, @CommandArgument int page) {
+    public void list(CommandContext context, @Parameter(required = false, defaultValue = "1") int page) {
         System.out.println(context.getSender());
         System.out.println("list:"+page);
     }
 
-    @SubCommand("item.load")
+    @SubCommand("item.get")
-    public void item_load(@CommandArgument(suggestionType = "world_list") String id, int page, double k, CommandContext context) {
+    public void item_get(CommandContext context) {
-        System.out.println(context.getSender());
+        Player player = (Player) context.getSender();
-        System.out.println("load:"+id);
+
-        System.out.println(page);
+        OriginItem originItem = new OriginItem(new ItemStack(Material.IRON_AXE));
-        System.out.println(k);
+        originItem.setStatData(ItemStats.getItemStat(IdStat.class), new StringData("test"));
+        player.getInventory().addItem(originItem.getItemStack());
     }
 
-    @SubCommand("item.save")
+    @SubCommand("item.load")
-    public void item_save(@CommandArgument String id) {
+    public void item_load(CommandContext context) {
-        System.out.println("save:"+id);
+        Player player = (Player) context.getSender();
+        ItemStack itemStack = player.getInventory().getItemInMainHand();
+        if (itemStack == null || itemStack.getType() == Material.AIR) {
+            return;
+        }
+        OriginItem originItem = new OriginItem(itemStack);
+        System.out.println(originItem.getStats());
     }
 
     @SubCommand("item.test")
-    public void item_test(@CommandArgument String id) {
+    public void item_test(@Parameter String id) {
         System.out.println(id);
     }
 }

src/main/java/com/io/yutian/elementoriginlib/exception/command/CommandParseException.java

@@ -0,0 +1,21 @@
+package com.io.yutian.elementoriginlib.exception.command;
+
+public class CommandParseException extends RuntimeException {
+
+    public CommandParseException() {
+        super();
+    }
+
+    public CommandParseException(String s) {
+        super(s);
+    }
+
+    public CommandParseException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public CommandParseException(Throwable cause) {
+        super(cause);
+    }
+
+}

src/main/java/com/io/yutian/elementoriginlib/exception/command/CommandRegisterException.java

@@ -1,21 +0,0 @@
-package com.io.yutian.elementoriginlib.exception.command;
-
-public class CommandRegisterException extends RuntimeException {
-
-    public CommandRegisterException() {
-        super();
-    }
-
-    public CommandRegisterException(String s) {
-        super(s);
-    }
-
-    public CommandRegisterException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
-    public CommandRegisterException(Throwable cause) {
-        super(cause);
-    }
-
-}

src/main/java/com/io/yutian/elementoriginlib/gui/button/ItemButton.java

@@ -1,7 +1,7 @@
 package com.io.yutian.elementoriginlib.gui.button;
 
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
-import com.io.yutian.elementoriginlib.nbt.TagString;
+import com.io.yutian.elementoriginlib.tag.TagString;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 
@@ -20,11 +20,11 @@ public class ItemButton extends Button {
 
     public ItemButton(ItemStack itemStack) {
         super(itemStack);
-        NBTItem nbtItem = new NBTItem(itemStack);
+        ItemProxy itemProxy = new ItemProxy(itemStack);
-        nbtItem.editTag((nbtCompound -> {
+        itemProxy.editTag((nbtCompound -> {
             nbtCompound.putString("gui_meta", "item_button");
         }));
-        setItemStack(nbtItem.getItemStack());
+        setItemStack(itemProxy.getItemStack());
     }
 
     public ItemButton setItem(ItemStack item) {
@@ -51,8 +51,8 @@ public class ItemButton extends Button {
     }
 
     public boolean isItem(ItemStack item) {
-        NBTItem nbtItem = new NBTItem(item);
+        ItemProxy itemProxy = new ItemProxy(item);
-        return nbtItem.has("gui_meta", TagString.TYPE_ID) && ((TagString) nbtItem.get("gui_meta")).getString().equals("item_button");
+        return itemProxy.has("gui_meta", TagString.TYPE_ID) && ((TagString) itemProxy.get("gui_meta")).getString().equals("item_button");
     }
 
     public ItemButton clickItem(BiConsumer<Player, ItemStack> consumer) {

src/main/java/com/io/yutian/elementoriginlib/item/OriginItem.java

@@ -1,33 +1,37 @@
 package com.io.yutian.elementoriginlib.item;
 
 import com.io.yutian.elementoriginlib.item.stat.ItemStat;
+import com.io.yutian.elementoriginlib.item.stat.ItemStats;
 import com.io.yutian.elementoriginlib.item.stat.StatData;
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
 import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.HashMap;
+import java.util.*;
-import java.util.Iterator;
-import java.util.Map;
-import java.util.Set;
 
 public class OriginItem {
 
     private ItemStack itemStack;
-    private NBTItem nbtItem;
+    private ItemProxy itemProxy;
     private Map<ItemStat, StatData> stats = new HashMap<>();
 
+    private OriginItemStackBuilder builder;
+
     public OriginItem(ItemStack itemStack) {
         this.itemStack = itemStack;
-        this.nbtItem = new NBTItem(itemStack);
+        this.itemProxy = new ItemProxy(itemStack);
+
+        this.builder = new OriginItemStackBuilder(this);
     }
 
     public void setStatData(@NotNull ItemStat stat, @NotNull StatData data) {
         this.stats.put(stat, data);
+        this.itemStack = builder().build();
     }
 
     public void removeStatData(@NotNull ItemStat stat) {
         this.stats.remove(stat);
+        this.itemStack = builder().build();
     }
 
     public <S extends StatData> S getStatData(@NotNull ItemStat<S> stat) {
@@ -50,20 +54,34 @@ public class OriginItem {
 
     @NotNull
     public OriginItemStackBuilder builder() {
-        return new OriginItemStackBuilder(this);
+        return this.builder;
     }
 
     @NotNull
-    public Set<ItemStat> getStats() {
+    public Set<ItemStat> getStatTypes() {
-        return this.stats.keySet();
+        return Collections.unmodifiableSet(this.stats.keySet());
+    }
+
+    @NotNull
+    public Map<ItemStat, StatData> getStats() {
+        for (ItemStat stat : ItemStats.getItemStats()) {
+            if (!hasStatData(stat)) {
+                try {
+                    stat.load(this);
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+        return Collections.unmodifiableMap(stats);
     }
 
     public ItemStack getItemStack() {
         return itemStack;
     }
 
-    public NBTItem getNBTItem() {
+    public ItemProxy getItemProxy() {
-        return nbtItem;
+        return itemProxy;
     }
 
     @Override

src/main/java/com/io/yutian/elementoriginlib/item/OriginItemStackBuilder.java

@@ -1,7 +1,7 @@
 package com.io.yutian.elementoriginlib.item;
 
 import com.io.yutian.elementoriginlib.item.stat.StatData;
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
 import org.jetbrains.annotations.NotNull;
@@ -16,18 +16,18 @@ public class OriginItemStackBuilder {
     protected ItemStack itemStack;
     protected ItemMeta itemMeta;
 
-    protected NBTItem nbtItem;
+    protected ItemProxy itemProxy;
 
     public OriginItemStackBuilder(OriginItem originItem) {
         this.originItem = originItem;
         this.itemStack = originItem.getItemStack();
         this.itemMeta = itemStack.getItemMeta();
-        this.nbtItem = originItem.getNBTItem();
+        this.itemProxy = originItem.getItemProxy();
     }
 
     @NotNull
     public ItemStack build() {
-        buildNBT();
+        buildCompounds();
         return itemStack;
     }
 
@@ -36,29 +36,20 @@ public class OriginItemStackBuilder {
         return itemMeta;
     }
 
-    private void buildNBT() {
+    private void buildCompounds() {
-        originItem.getStats().forEach(stat -> {
+        originItem.getStats().forEach((stat, statData) -> stat.whenApplied(this, statData));
-            StatData statData = originItem.getStatData(stat);
+        itemStack = itemProxy.getItemStack();
-            stat.whenApplied(this, statData);
-        });
-        itemStack = nbtItem.getItemStack();
         itemMeta = itemStack.getItemMeta();
-        originItem.getStats().forEach(stat -> {
+        originItem.getStats().forEach((stat, statData) -> stat.applyMeta(this, statData));
-            StatData statData = originItem.getStatData(stat);
-            stat.applyMeta(this, statData);
-        });
         itemStack.setItemMeta(itemMeta);
         List<String> lores = itemMeta.hasLore() ? itemMeta.getLore() : new ArrayList<>();
-        originItem.getStats().forEach(stat -> {
+        originItem.getStats().forEach((stat, statData) -> stat.whenApplyLore(this, statData, lores));
-            StatData statData = originItem.getStatData(stat);
-            stat.whenApplyLore(this, statData, lores);
-        });
         itemStack.setLore(lores);
     }
 
     @NotNull
-    public NBTItem getNBTItem() {
+    public ItemProxy getNBTItem() {
-        return nbtItem;
+        return itemProxy;
     }
 
     public OriginItem getOriginItem() {

src/main/java/com/io/yutian/elementoriginlib/item/stat/ItemStat.java

@@ -2,7 +2,7 @@ package com.io.yutian.elementoriginlib.item.stat;
 
 import com.io.yutian.elementoriginlib.item.OriginItem;
 import com.io.yutian.elementoriginlib.item.OriginItemStackBuilder;
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -29,10 +29,10 @@ public abstract class ItemStat<S extends StatData> {
     }
 
     @Nullable
-    public abstract S getLoadedNBT(@NotNull NBTItem nbtItem);
+    public abstract S getLoadedNBT(@NotNull ItemProxy itemProxy);
 
     public void load(@NotNull OriginItem originItem) {
-        S loadedNBT = getLoadedNBT(originItem.getNBTItem());
+        S loadedNBT = getLoadedNBT(originItem.getItemProxy());
         if (loadedNBT != null) {
             originItem.setStatData(this, loadedNBT);
         }

src/main/java/com/io/yutian/elementoriginlib/item/stat/ItemStats.java

@@ -1,25 +1,30 @@
 package com.io.yutian.elementoriginlib.item.stat;
 
-import com.io.yutian.elementoriginlib.item.stat.list.ItemStatId;
+import com.io.yutian.elementoriginlib.item.stat.list.IdStat;
+import com.io.yutian.elementoriginlib.logger.Logger;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
 public class ItemStats {
 
+    private static final Logger LOGGER = Logger.getLogger(ItemStats.class);
+
     private static Map<Class<? extends ItemStat>, ItemStat<?>> itemStats = new HashMap<>();
 
     static {
-        register(ItemStatId.class, new ItemStatId());
+        register(IdStat.class, new IdStat());
     }
 
-    public static <I extends ItemStat> I register(Class<I> clazz, I itemStat) {
+    public static <I extends ItemStat> void register(Class<I> clazz, I itemStat) {
         if (itemStats.containsKey(itemStat.getId())) {
-            return itemStat;
+            LOGGER.warn("ItemStat "+clazz.getName()+" 已经注册过了");
+            return;
         }
         itemStats.put(clazz, itemStat);
-        return itemStat;
     }
 
     public static void unregister(ItemStat itemStat) {
@@ -41,4 +46,8 @@ public class ItemStats {
         return null;
     }
 
+    public static Collection<ItemStat> getItemStats() {
+        return Collections.unmodifiableCollection(itemStats.values());
+    }
+
 }

src/main/java/com/io/yutian/elementoriginlib/item/stat/list/IdStat.java

@@ -2,9 +2,9 @@ package com.io.yutian.elementoriginlib.item.stat.list;
 
 import com.io.yutian.elementoriginlib.item.stat.type.StringStat;
 
-public class ItemStatId extends StringStat {
+public class IdStat extends StringStat {
 
-    public ItemStatId() {
+    public IdStat() {
         super("id", "Id");
     }
 

src/main/java/com/io/yutian/elementoriginlib/item/stat/type/BooleanStat.java

@@ -3,8 +3,8 @@ package com.io.yutian.elementoriginlib.item.stat.type;
 import com.io.yutian.elementoriginlib.item.OriginItemStackBuilder;
 import com.io.yutian.elementoriginlib.item.stat.ItemStat;
 import com.io.yutian.elementoriginlib.item.stat.data.BooleanData;
-import com.io.yutian.elementoriginlib.nbt.TagByte;
+import com.io.yutian.elementoriginlib.tag.TagByte;
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -16,14 +16,14 @@ public abstract class BooleanStat extends ItemStat<BooleanData> {
 
     @Override
     public void whenApplied(@NotNull OriginItemStackBuilder itemStackBuilder, @NotNull BooleanData statData) {
-        NBTItem nbtItem = itemStackBuilder.getNBTItem();
+        ItemProxy itemProxy = itemStackBuilder.getNBTItem();
-        nbtItem.editTag(nbtCompound -> nbtCompound.putByte(getNBTPath(), (byte) (statData.getValue() ? 1 : 0)));
+        itemProxy.editTag(nbtCompound -> nbtCompound.putByte(getNBTPath(), (byte) (statData.getValue() ? 1 : 0)));
     }
 
     @Nullable
     @Override
-    public BooleanData getLoadedNBT(@NotNull NBTItem nbtItem) {
+    public BooleanData getLoadedNBT(@NotNull ItemProxy itemProxy) {
-        return new BooleanData(((TagByte) nbtItem.get(getNBTPath())).getByte() == 1);
+        return new BooleanData(((TagByte) itemProxy.get(getNBTPath())).getByte() == 1);
     }
 
 }

src/main/java/com/io/yutian/elementoriginlib/item/stat/type/DoubleStat.java

@@ -3,8 +3,8 @@ package com.io.yutian.elementoriginlib.item.stat.type;
 import com.io.yutian.elementoriginlib.item.OriginItemStackBuilder;
 import com.io.yutian.elementoriginlib.item.stat.ItemStat;
 import com.io.yutian.elementoriginlib.item.stat.data.DoubleData;
-import com.io.yutian.elementoriginlib.nbt.TagDouble;
+import com.io.yutian.elementoriginlib.tag.TagDouble;
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -16,14 +16,14 @@ public abstract class DoubleStat extends ItemStat<DoubleData> {
 
     @Override
     public void whenApplied(@NotNull OriginItemStackBuilder itemStackBuilder, @NotNull DoubleData statData) {
-        NBTItem nbtItem = itemStackBuilder.getNBTItem();
+        ItemProxy itemProxy = itemStackBuilder.getNBTItem();
-        nbtItem.editTag(nbtCompound -> nbtCompound.putDouble(getNBTPath(), statData.getValue()));
+        itemProxy.editTag(nbtCompound -> nbtCompound.putDouble(getNBTPath(), statData.getValue()));
     }
 
     @Nullable
     @Override
-    public DoubleData getLoadedNBT(@NotNull NBTItem nbtItem) {
+    public DoubleData getLoadedNBT(@NotNull ItemProxy itemProxy) {
-        return new DoubleData(((TagDouble) nbtItem.get(getNBTPath())).getDouble());
+        return new DoubleData(((TagDouble) itemProxy.get(getNBTPath())).getDouble());
     }
 
 }

src/main/java/com/io/yutian/elementoriginlib/item/stat/type/IntStat.java

@@ -3,8 +3,8 @@ package com.io.yutian.elementoriginlib.item.stat.type;
 import com.io.yutian.elementoriginlib.item.OriginItemStackBuilder;
 import com.io.yutian.elementoriginlib.item.stat.ItemStat;
 import com.io.yutian.elementoriginlib.item.stat.data.IntData;
-import com.io.yutian.elementoriginlib.nbt.TagInt;
+import com.io.yutian.elementoriginlib.tag.TagInt;
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -16,14 +16,14 @@ public abstract class IntStat extends ItemStat<IntData> {
 
     @Override
     public void whenApplied(@NotNull OriginItemStackBuilder itemStackBuilder, @NotNull IntData statData) {
-        NBTItem nbtItem = itemStackBuilder.getNBTItem();
+        ItemProxy itemProxy = itemStackBuilder.getNBTItem();
-        nbtItem.editTag(nbtCompound -> nbtCompound.putInt(getNBTPath(), statData.getInt()));
+        itemProxy.editTag(nbtCompound -> nbtCompound.putInt(getNBTPath(), statData.getInt()));
     }
 
     @Nullable
     @Override
-    public IntData getLoadedNBT(@NotNull NBTItem nbtItem) {
+    public IntData getLoadedNBT(@NotNull ItemProxy itemProxy) {
-        return new IntData(((TagInt)nbtItem.get(getNBTPath())).getInt());
+        return new IntData(((TagInt) itemProxy.get(getNBTPath())).getInt());
     }
 
 }

src/main/java/com/io/yutian/elementoriginlib/item/stat/type/StringListStat.java

@@ -3,9 +3,9 @@ package com.io.yutian.elementoriginlib.item.stat.type;
 import com.io.yutian.elementoriginlib.item.OriginItemStackBuilder;
 import com.io.yutian.elementoriginlib.item.stat.ItemStat;
 import com.io.yutian.elementoriginlib.item.stat.data.StringListData;
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
-import com.io.yutian.elementoriginlib.nbt.TagList;
+import com.io.yutian.elementoriginlib.tag.TagList;
-import com.io.yutian.elementoriginlib.nbt.TagString;
+import com.io.yutian.elementoriginlib.tag.TagString;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -20,19 +20,19 @@ public abstract class StringListStat extends ItemStat<StringListData> {
 
     @Override
     public void whenApplied(@NotNull OriginItemStackBuilder itemStackBuilder, @NotNull StringListData statData) {
-        NBTItem nbtItem = itemStackBuilder.getNBTItem();
+        ItemProxy itemProxy = itemStackBuilder.getNBTItem();
         TagList<TagString> tagList = new TagList<>();
         statData.getList().forEach(s -> tagList.add(new TagString(s)));
-        nbtItem.editTag(nbtCompound -> nbtCompound.put(getNBTPath(), tagList));
+        itemProxy.editTag(nbtCompound -> nbtCompound.put(getNBTPath(), tagList));
     }
 
     @Nullable
     @Override
-    public StringListData getLoadedNBT(@NotNull NBTItem nbtItem) {
+    public StringListData getLoadedNBT(@NotNull ItemProxy itemProxy) {
-        if (!nbtItem.has(getNBTPath(), TagList.TYPE_ID)) {
+        if (!itemProxy.has(getNBTPath(), TagList.TYPE_ID)) {
             return new StringListData(new ArrayList<>());
         }
-        TagList<TagString> tagList = (TagList<TagString>) nbtItem.get(getNBTPath());
+        TagList<TagString> tagList = (TagList<TagString>) itemProxy.get(getNBTPath());
         List<String> list = new ArrayList<>();
         for (int i = 0; i < tagList.size(); i++) {
             list.add(tagList.get(i).getString());

src/main/java/com/io/yutian/elementoriginlib/item/stat/type/StringStat.java

@@ -3,8 +3,8 @@ package com.io.yutian.elementoriginlib.item.stat.type;
 import com.io.yutian.elementoriginlib.item.OriginItemStackBuilder;
 import com.io.yutian.elementoriginlib.item.stat.ItemStat;
 import com.io.yutian.elementoriginlib.item.stat.data.StringData;
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
-import com.io.yutian.elementoriginlib.nbt.TagString;
+import com.io.yutian.elementoriginlib.tag.TagString;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -16,15 +16,15 @@ public abstract class StringStat extends ItemStat<StringData> {
 
     @Override
     public void whenApplied(@NotNull OriginItemStackBuilder itemStackBuilder, @NotNull StringData statData) {
-        NBTItem nbtItem = itemStackBuilder.getNBTItem();
+        ItemProxy itemProxy = itemStackBuilder.getNBTItem();
-        nbtItem.editTag(nbtCompound -> nbtCompound.putString(getNBTPath(), statData.getString()));
+        itemProxy.editTag(nbtCompound -> nbtCompound.putString(getNBTPath(), statData.getString()));
     }
 
 
     @Nullable
     @Override
-    public StringData getLoadedNBT(@NotNull NBTItem nbtItem) {
+    public StringData getLoadedNBT(@NotNull ItemProxy itemProxy) {
-        return new StringData(((TagString) nbtItem.get(getNBTPath())).getString());
+        return new StringData(((TagString) itemProxy.get(getNBTPath())).getString());
     }
 
 }

src/main/java/com/io/yutian/elementoriginlib/item/stat/type/UUIDStat.java

@@ -3,8 +3,8 @@ package com.io.yutian.elementoriginlib.item.stat.type;
 import com.io.yutian.elementoriginlib.item.OriginItemStackBuilder;
 import com.io.yutian.elementoriginlib.item.stat.ItemStat;
 import com.io.yutian.elementoriginlib.item.stat.data.UUIDData;
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
-import com.io.yutian.elementoriginlib.nbt.TagString;
+import com.io.yutian.elementoriginlib.tag.TagString;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -18,14 +18,14 @@ public abstract class UUIDStat extends ItemStat<UUIDData> {
 
     @Override
     public void whenApplied(@NotNull OriginItemStackBuilder itemStackBuilder, @NotNull UUIDData statData) {
-        NBTItem nbtItem = itemStackBuilder.getNBTItem();
+        ItemProxy itemProxy = itemStackBuilder.getNBTItem();
-        nbtItem.editTag(nbtCompound -> nbtCompound.putString(getNBTPath(), statData.getUUID().toString()));
+        itemProxy.editTag(nbtCompound -> nbtCompound.putString(getNBTPath(), statData.getUUID().toString()));
     }
 
     @Nullable
     @Override
-    public UUIDData getLoadedNBT(@NotNull NBTItem nbtItem) {
+    public UUIDData getLoadedNBT(@NotNull ItemProxy itemProxy) {
-        return new UUIDData(UUID.fromString(((TagString) nbtItem.get(getNBTPath())).getString()));
+        return new UUIDData(UUID.fromString(((TagString) itemProxy.get(getNBTPath())).getString()));
     }
 
 }

src/main/java/com/io/yutian/elementoriginlib/manager/CommandManager.java

@@ -1,6 +1,7 @@
 package com.io.yutian.elementoriginlib.manager;
 
 import com.io.yutian.elementoriginlib.command.SimpleCommandManager;
+import com.io.yutian.elementoriginlib.command.list.CommandHelp;
 import com.io.yutian.elementoriginlib.command.list.CommandTest;
 import org.bukkit.plugin.Plugin;
 
@@ -8,8 +9,8 @@ public class CommandManager extends SimpleCommandManager {
 
     public CommandManager(Plugin plugin) {
         super(plugin, "elementoriginlib");
-//        register(new CommandHelp(this, "help"));
+        register(new CommandHelp(this, "help"));
-        register(CommandTest.class);
+        register(new CommandTest());
     }
 
 }

src/main/java/com/io/yutian/elementoriginlib/serialize/serializers/ItemStackDeserializer.java

@@ -4,7 +4,7 @@ import com.fasterxml.jackson.core.JacksonException;
 import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.databind.DeserializationContext;
 import com.fasterxml.jackson.databind.JsonDeserializer;
-import com.io.yutian.elementoriginlib.nbt.TagHelper;
+import com.io.yutian.elementoriginlib.tag.TagHelper;
 import net.minecraft.core.HolderLookup;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.server.MinecraftServer;

src/main/java/com/io/yutian/elementoriginlib/serialize/serializers/ItemStackSerializer.java

@@ -3,7 +3,7 @@ package com.io.yutian.elementoriginlib.serialize.serializers;
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.SerializerProvider;
-import com.io.yutian.elementoriginlib.nbt.TagHelper;
+import com.io.yutian.elementoriginlib.tag.TagHelper;
 import org.bukkit.craftbukkit.inventory.CraftItemStack;
 import org.bukkit.inventory.ItemStack;
 

src/main/java/com/io/yutian/elementoriginlib/tag/ITag.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 import net.minecraft.nbt.*;
 

src/main/java/com/io/yutian/elementoriginlib/tag/ItemProxy.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 import com.io.yutian.elementoriginlib.serialize.serializers.ItemStackDeserializer;
 import net.minecraft.core.component.DataComponents;
@@ -11,23 +11,23 @@ import org.jetbrains.annotations.NotNull;
 import javax.annotation.Nullable;
 import java.util.function.Consumer;
 
-public class NBTItem {
+public class ItemProxy {
 
     private ItemStack originalItemStack;
     private net.minecraft.world.item.ItemStack nmsItemStack;
 
     protected ItemStack resultItemStack;
 
-    public NBTItem(ItemStack itemStack) {
+    public ItemProxy(ItemStack itemStack) {
         this.originalItemStack = itemStack;
         this.nmsItemStack = CraftItemStack.asNMSCopy(itemStack);
     }
 
     @NotNull
     public TagCompound getTag() {
-        CompoundTag tag = nmsItemStack.getComponents().get(DataComponents.CUSTOM_DATA).getUnsafe();
+        CompoundTag tag = new CompoundTag();
-        if (tag == null) {
+        if (nmsItemStack.getComponents().has(DataComponents.CUSTOM_DATA)) {
-            tag = new CompoundTag();
+            tag = nmsItemStack.getComponents().get(DataComponents.CUSTOM_DATA).getUnsafe();
         }
         return (TagCompound) ITag.as(tag);
     }
@@ -71,13 +71,13 @@ public class NBTItem {
         return nmsItemStack;
     }
 
-    public static NBTItem build(ItemStack itemStack) {
+    public static ItemProxy build(ItemStack itemStack) {
-        return new NBTItem(itemStack);
+        return new ItemProxy(itemStack);
     }
 
-    public static NBTItem build(TagCompound tagCompound) {
+    public static ItemProxy build(TagCompound tagCompound) {
         net.minecraft.world.item.ItemStack nmsItemStack = net.minecraft.world.item.ItemStack.parse(ItemStackDeserializer.getRegistry(), ITag.asNMS(tagCompound)).get();
-        return new NBTItem(CraftItemStack.asBukkitCopy(nmsItemStack));
+        return new ItemProxy(CraftItemStack.asBukkitCopy(nmsItemStack));
     }
 
 }

src/main/java/com/io/yutian/elementoriginlib/tag/TagByte.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 public class TagByte extends TagNumber {
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagByteArray.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 import java.util.Arrays;
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagCompound.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 import java.util.*;
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagDouble.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 public class TagDouble extends TagNumber {
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagFloat.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 public class TagFloat extends TagNumber {
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagHelper.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 import net.minecraft.nbt.*;
 import net.minecraft.nbt.Tag;

src/main/java/com/io/yutian/elementoriginlib/tag/TagInt.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 public class TagInt extends TagNumber {
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagIntArray.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 import java.util.Arrays;
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagList.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 import java.util.ArrayList;
 import java.util.List;

src/main/java/com/io/yutian/elementoriginlib/tag/TagLong.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 public class TagLong extends TagNumber {
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagLongArray.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 import java.util.Arrays;
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagNumber.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 public abstract class TagNumber implements ITag {
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagShort.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 public class TagShort extends TagNumber {
 

src/main/java/com/io/yutian/elementoriginlib/tag/TagString.java

@@ -1,4 +1,4 @@
-package com.io.yutian.elementoriginlib.nbt;
+package com.io.yutian.elementoriginlib.tag;
 
 import java.util.Objects;
 

src/main/java/com/io/yutian/elementoriginlib/util/ItemStackUtil.java

@@ -1,7 +1,7 @@
 package com.io.yutian.elementoriginlib.util;
 
-import com.io.yutian.elementoriginlib.nbt.TagCompound;
+import com.io.yutian.elementoriginlib.tag.TagCompound;
-import com.io.yutian.elementoriginlib.nbt.NBTItem;
+import com.io.yutian.elementoriginlib.tag.ItemProxy;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.inventory.Inventory;
@@ -45,8 +45,8 @@ public class ItemStackUtil {
         if (!flag) {
             return false;
         }
-        NBTItem nbtOriginal = new NBTItem(original);
+        ItemProxy nbtOriginal = new ItemProxy(original);
-        NBTItem nbtTester = new NBTItem(tester);
+        ItemProxy nbtTester = new ItemProxy(tester);
         TagCompound tagCompound0 = nbtOriginal.getTag();
         TagCompound tagCompound1 = nbtTester.getTag();
         return tagCompound0.equals(tagCompound1);