diff --git a/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/controller/UserController.java b/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/controller/UserController.java
index 573ffccf..9b7d5faa 100644
--- a/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/controller/UserController.java
+++ b/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/controller/UserController.java
@@ -33,6 +33,8 @@ public class UserController {
     private XxlJobUserDao xxlJobUserDao;
     @Resource
     private XxlJobGroupDao xxlJobGroupDao;
+    private  String systemLenghLimit ="system_lengh_limit";
+    private  String fourTwenty ="[4-20]";
 
     @RequestMapping
     @PermissionLimit(adminuser = true)
@@ -54,12 +56,12 @@ public class UserController {
 
         // page list
         List<XxlJobUser> list = xxlJobUserDao.pageList(start, length, username, role);
-        int list_count = xxlJobUserDao.pageListCount(start, length, username, role);
+        int listCount = xxlJobUserDao.pageListCount(start, length, username, role);
 
         // package result
-        Map<String, Object> maps = new HashMap<String, Object>();
-        maps.put("recordsTotal", list_count);		// 总记录数
-        maps.put("recordsFiltered", list_count);	// 过滤后的总记录数
+        Map<String, Object> maps = new HashMap<>();
+        maps.put("recordsTotal", listCount);		// 总记录数
+        maps.put("recordsFiltered", listCount);	// 过滤后的总记录数
         maps.put("data", list);  					// 分页列表
         return maps;
     }
@@ -71,19 +73,19 @@ public class UserController {
 
         // valid username
         if (!StringUtils.hasText(xxlJobUser.getUsername())) {
-            return new ReturnT<String>(ReturnT.FAIL_CODE, I18nUtil.getString("system_please_input")+I18nUtil.getString("user_username") );
+            return new ReturnT<>(ReturnT.FAIL_CODE, I18nUtil.getString("system_please_input")+I18nUtil.getString("user_username") );
         }
         xxlJobUser.setUsername(xxlJobUser.getUsername().trim());
         if (!(xxlJobUser.getUsername().length()>=4 && xxlJobUser.getUsername().length()<=20)) {
-            return new ReturnT<String>(ReturnT.FAIL_CODE, I18nUtil.getString("system_lengh_limit")+"[4-20]" );
+            return new ReturnT<>(ReturnT.FAIL_CODE, I18nUtil.getString(systemLenghLimit)+fourTwenty );
         }
         // valid password
         if (!StringUtils.hasText(xxlJobUser.getPassword())) {
-            return new ReturnT<String>(ReturnT.FAIL_CODE, I18nUtil.getString("system_please_input")+I18nUtil.getString("user_password") );
+            return new ReturnT<>(ReturnT.FAIL_CODE, I18nUtil.getString("system_please_input")+I18nUtil.getString("user_password") );
         }
         xxlJobUser.setPassword(xxlJobUser.getPassword().trim());
         if (!(xxlJobUser.getPassword().length()>=4 && xxlJobUser.getPassword().length()<=20)) {
-            return new ReturnT<String>(ReturnT.FAIL_CODE, I18nUtil.getString("system_lengh_limit")+"[4-20]" );
+            return new ReturnT<>(ReturnT.FAIL_CODE, I18nUtil.getString(systemLenghLimit)+fourTwenty );
         }
         // md5 password
         xxlJobUser.setPassword(DigestUtils.md5DigestAsHex(xxlJobUser.getPassword().getBytes()));
@@ -91,7 +93,7 @@ public class UserController {
         // check repeat
         XxlJobUser existUser = xxlJobUserDao.loadByUserName(xxlJobUser.getUsername());
         if (existUser != null) {
-            return new ReturnT<String>(ReturnT.FAIL_CODE, I18nUtil.getString("user_username_repeat") );
+            return new ReturnT<>(ReturnT.FAIL_CODE, I18nUtil.getString("user_username_repeat") );
         }
 
         // write
@@ -107,14 +109,14 @@ public class UserController {
         // avoid opt login seft
         XxlJobUser loginUser = (XxlJobUser) request.getAttribute(LoginService.LOGIN_IDENTITY_KEY);
         if (loginUser.getUsername().equals(xxlJobUser.getUsername())) {
-            return new ReturnT<String>(ReturnT.FAIL.getCode(), I18nUtil.getString("user_update_loginuser_limit"));
+            return new ReturnT<>(ReturnT.FAIL.getCode(), I18nUtil.getString("user_update_loginuser_limit"));
         }
 
         // valid password
         if (StringUtils.hasText(xxlJobUser.getPassword())) {
             xxlJobUser.setPassword(xxlJobUser.getPassword().trim());
             if (!(xxlJobUser.getPassword().length()>=4 && xxlJobUser.getPassword().length()<=20)) {
-                return new ReturnT<String>(ReturnT.FAIL_CODE, I18nUtil.getString("system_lengh_limit")+"[4-20]" );
+                return new ReturnT<>(ReturnT.FAIL_CODE, I18nUtil.getString(systemLenghLimit)+fourTwenty );
             }
             // md5 password
             xxlJobUser.setPassword(DigestUtils.md5DigestAsHex(xxlJobUser.getPassword().getBytes()));
@@ -135,7 +137,7 @@ public class UserController {
         // avoid opt login seft
         XxlJobUser loginUser = (XxlJobUser) request.getAttribute(LoginService.LOGIN_IDENTITY_KEY);
         if (loginUser.getId() == id) {
-            return new ReturnT<String>(ReturnT.FAIL.getCode(), I18nUtil.getString("user_update_loginuser_limit"));
+            return new ReturnT<>(ReturnT.FAIL.getCode(), I18nUtil.getString("user_update_loginuser_limit"));
         }
 
         xxlJobUserDao.delete(id);
@@ -148,11 +150,11 @@ public class UserController {
 
         // valid password
         if (password==null || password.trim().length()==0){
-            return new ReturnT<String>(ReturnT.FAIL.getCode(), "密码不可为空");
+            return new ReturnT<>(ReturnT.FAIL.getCode(), "密码不可为空");
         }
         password = password.trim();
         if (!(password.length()>=4 && password.length()<=20)) {
-            return new ReturnT<String>(ReturnT.FAIL_CODE, I18nUtil.getString("system_lengh_limit")+"[4-20]" );
+            return new ReturnT<>(ReturnT.FAIL_CODE, I18nUtil.getString(systemLenghLimit)+fourTwenty );
         }
 
         // md5 password