diff --git a/src/main/resources/modules/bukkit.js b/src/main/resources/modules/bukkit.js
index 0b597b3..55af460 100644
--- a/src/main/resources/modules/bukkit.js
+++ b/src/main/resources/modules/bukkit.js
@@ -7,6 +7,7 @@
 /*global Java, base, module, exports, require, __FILE__*/
 var Bukkit = Java.type("org.bukkit.Bukkit");
 // noinspection JSUnresolvedVariable
+var Server = Bukkit.server;
 var PluginManager = Bukkit.pluginManager;
 exports.$ = Bukkit;
 /**
@@ -19,6 +20,22 @@ exports.nmsVersion = Bukkit.server.class.name.split('.')[3];
 exports.nmsCls = function (name) {
     return Java.type(['net.minecraft.server', exports.nmsVersion, name].join('.'));
 }
+exports.command = function (name) {
+    return Server.getPluginCommand(name);
+}
+/**
+ * 获取玩家
+ */
+exports.player = function(){
+    switch (arguments.length) {
+        case 0:
+            return undefined;
+        case 1:
+            return Bukkit.getPlayer(arguments[0]);
+        default:
+            return Bukkit.getPlayerExtra(arguments[0]);
+    }
+}
 /**
  * 获取在线玩家
  */
diff --git a/src/main/resources/modules/command.js b/src/main/resources/modules/command.js
index 06364b9..21f9391 100644
--- a/src/main/resources/modules/command.js
+++ b/src/main/resources/modules/command.js
@@ -12,7 +12,7 @@ var PluginCommand = Java.type('org.bukkit.command.PluginCommand');
 
 var Arrays = Java.type('java.util.Arrays')
 
-function init(jsp){
+function enable(jsp){
     var commands = jsp.description.commands;
     if(commands){
         var pluginCmds = [];
@@ -66,7 +66,8 @@ function on(jsp, name, exec) {
     }
 }
 
-exports.init = init
+exports.enable = enable
+
 exports.on = on;
 exports.off = function () {
 
diff --git a/src/main/resources/modules/permission.js b/src/main/resources/modules/permission.js
new file mode 100644
index 0000000..3eca344
--- /dev/null
+++ b/src/main/resources/modules/permission.js
@@ -0,0 +1,48 @@
+'use strict';
+/**
+ * Bukkit 权限相关类
+ */
+
+/*global Java, base, module, exports, require, __FILE__*/
+var manager = require('./bukkit').plugin.manager;
+
+/**
+ * Permission(String name, String description)
+ */
+var Permission = Java.type("org.bukkit.permissions.Permission");
+var PermissionDefault = Java.type('org.bukkit.permissions.PermissionDefault');
+
+function enable (plugin) {
+    var permissions = plugin.description.permissions;
+    if(permissions){
+       for (var name in permissions){
+           var permission = permissions[name];
+           if (typeof permission !== 'object') continue;
+           var desc = permission.description;
+           var def = permission.default || 'OP';
+           try {
+               manager.addPermission(new Permission(name, desc, PermissionDefault.getByName(def)));    
+           } catch (ex) {
+               // ignore eg: java.lang.IllegalArgumentException: The permission xxxxxx.default is already defined!
+           }
+           log.d('插件 %s 注册权限 %s Default %s ...', plugin.description.name, name, def);
+       }
+    }
+}
+
+function disable (plugin) {
+    var permissions = plugin.description.permissions;
+    if(permissions){
+       for (var name in permissions){
+           try {
+               manager.removePermission(name);    
+           } catch (ex) {
+               // ignore eg: java.lang.IllegalArgumentException: The permission xxxxxx.default is already defined!
+           }
+           log.d('插件 %s 注销权限 %s ...', plugin.description.name, name);
+       }
+    }
+}
+
+exports.enable = enable
+exports.disable = disable
\ No newline at end of file
diff --git a/src/main/resources/modules/plugin.js b/src/main/resources/modules/plugin.js
index e4a9cb8..fde3630 100644
--- a/src/main/resources/modules/plugin.js
+++ b/src/main/resources/modules/plugin.js
@@ -9,6 +9,7 @@ var yaml = require('modules/yaml');
 var event = require('modules/event');
 var bukkit = require('./bukkit');
 var command = require('./command');
+var permission = require('./permission');
 
 /**
  * 载入插件
@@ -126,8 +127,9 @@ function initPlugin(file, plugin){
         return fs.file(plugin.getDataFolder(), name);
     }
     initPluginConfig(plugin);
-    initPluginCommand(plugin);
-    initPluginPermission(plugin);
+    
+    command.enable(plugin);
+    permission.enable(plugin);
 }
 
 /**
@@ -177,37 +179,6 @@ function initPluginConfig(plugin){
     }
 }
 
-/*
- * 初始化插件命令
- */
-function initPluginCommand(plugin) {
-    command.init(plugin);
-}
-
-
-/**
- * Permission(String name, String description)
- */
-var Permission = Java.type("org.bukkit.permissions.Permission");
-var PermissionDefault = Java.type('org.bukkit.permissions.PermissionDefault');
-/*
- * 初始化插件命令
- */
-function initPluginPermission(plugin) {
-    var permissions = plugin.description.permissions;
-    var manager = bukkit.plugin.manager;
-    if(permissions){
-       for (var name in permissions){
-           var permission = permissions[name];
-           if (typeof permission !== 'object') continue;
-           var desc = permission.description;
-           var def = permission.default || 'OP';
-           manager.addPermission(new Permission(name, desc, PermissionDefault.getByName(def)));
-           log.d('插件 %s 注册权限 %s Default %s ...', plugin.description.name, name, def);
-       }
-    }
-}
-
 function runAndCatch(jsp, exec, ext) {
     if (exec) {
         try {