update 优化查询用户的角色组、岗位组代码

ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserServiceImpl.java

@@ -1,5 +1,6 @@
 package com.ruoyi.system.service.impl;
 
+import cn.hutool.core.collection.CollUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
@@ -29,6 +30,7 @@ import org.springframework.transaction.annotation.Transactional;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.stream.Collectors;
 
 /**
  * 用户 业务层处理
@@ -127,14 +129,10 @@ public class SysUserServiceImpl extends ServicePlusImpl<SysUserMapper, SysUser,
     @Override
     public String selectUserRoleGroup(String userName) {
         List<SysRole> list = roleMapper.selectRolesByUserName(userName);
-        StringBuilder idsStr = new StringBuilder();
-        for (SysRole role : list) {
-            idsStr.append(role.getRoleName()).append(",");
+        if (CollUtil.isEmpty(list)) {
+            return StringUtils.EMPTY;
         }
-        if (StringUtils.isNotEmpty(idsStr.toString())) {
-            return idsStr.substring(0, idsStr.length() - 1);
-        }
-        return idsStr.toString();
+        return list.stream().map(SysRole::getRoleName).collect(Collectors.joining(","));
     }
 
     /**
@@ -146,14 +144,10 @@ public class SysUserServiceImpl extends ServicePlusImpl<SysUserMapper, SysUser,
     @Override
     public String selectUserPostGroup(String userName) {
         List<SysPost> list = postMapper.selectPostsByUserName(userName);
-        StringBuilder idsStr = new StringBuilder();
-        for (SysPost post : list) {
-            idsStr.append(post.getPostName()).append(",");
-        }
-        if (StringUtils.isNotEmpty(idsStr.toString())) {
-            return idsStr.substring(0, idsStr.length() - 1);
+        if (CollUtil.isEmpty(list)) {
+            return StringUtils.EMPTY;
         }
-        return idsStr.toString();
+        return list.stream().map(SysPost::getPostName).collect(Collectors.joining(","));
     }
 
     /**