remove bukkit commands

src/main/java/expvintl/tools/Tools.java

@@ -1,17 +1,21 @@
 package expvintl.tools;
 
 import expvintl.tools.listeners.LoginHandler;
+import expvintl.tools.utils.CommandHelper;
 import org.bukkit.*;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
+import org.bukkit.command.SimpleCommandMap;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
 
 import java.io.File;
+import java.lang.reflect.Field;
 import java.math.BigInteger;
 import java.security.MessageDigest;
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.Map;
 import java.util.Objects;
 import java.util.logging.Logger;
@@ -66,10 +70,41 @@ public final class Tools extends JavaPlugin {
             logger.warning(e.getMessage());
         }
     }
+
+    private void DisableBukkitCommands(){
+        try {
+            Field commands=SimpleCommandMap.class.getDeclaredField("knownCommands");
+            commands.setAccessible(true);
+            Map<String, Command> map= (Map<String, Command>) commands.get(CommandHelper.getCommandMap());
+            Iterator<String> it=map.keySet().iterator();
+            //取消注册下列命令
+            while(it.hasNext()) {
+                String cmd= it.next();
+                //移除bukkit命名空间中的命令
+                if (cmd.startsWith("bukkit:")) {
+                    it.remove();
+                }
+                //移除直接执行的命令
+                switch (cmd) {
+                    case "ver":
+                    case "version":
+                    case "pl":
+                    case "plugins":
+                    case "about":
+                        it.remove();
+                        break;
+                }
+            }
+            commands.setAccessible(false);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+    }
     @Override
     public void onEnable() {
-        // Plugin startup logic
         logger.info("expvintl:Tools ²å¼þÒÑÆôÓÃ!");
+        DisableBukkitCommands();
         initConfigs();
     }
 

src/main/java/expvintl/tools/utils/CommandHelper.java

@@ -0,0 +1,22 @@
+package expvintl.tools.utils;
+
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandMap;
+
+import java.lang.reflect.Field;
+
+public class CommandHelper {
+    private static CommandMap commandMap=null;
+    //获取命令Map并缓存
+    public static CommandMap getCommandMap(){
+        try {
+            Field map=Bukkit.getServer().getClass().getDeclaredField("commandMap");
+            map.setAccessible(true);
+            if(commandMap==null) commandMap=(CommandMap)map.get(Bukkit.getServer());
+            map.setAccessible(false);
+        } catch (Exception e) {
+            Bukkit.getLogger().warning("无法获取CommandMap:\n"+e.getMessage());
+        }
+        return commandMap;
+    }
+}