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

@@ -2,6 +2,8 @@ package com.ruoyi.system.service.impl;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Collectors;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -25,6 +27,7 @@ import com.ruoyi.system.mapper.SysUserPostMapper;
 import com.ruoyi.system.mapper.SysUserRoleMapper;
 import com.ruoyi.system.service.ISysConfigService;
 import com.ruoyi.system.service.ISysUserService;
+import org.springframework.util.CollectionUtils;
 
 /**
  * 用户 业务层处理
@@ -127,16 +130,11 @@ public class SysUserServiceImpl implements ISysUserService
     public String selectUserRoleGroup(String userName)
     {
         List<SysRole> list = roleMapper.selectRolesByUserName(userName);
-        StringBuffer idsStr = new StringBuffer();
+        if (CollectionUtils.isEmpty(list))
-        for (SysRole role : list)
-        {
-            idsStr.append(role.getRoleName()).append(",");
-        }
-        if (StringUtils.isNotEmpty(idsStr.toString()))
         {
-            return idsStr.substring(0, idsStr.length() - 1);
+            return StringUtils.EMPTY;
         }
-        return idsStr.toString();
+        return list.stream().map(SysRole::getRoleName).collect(Collectors.joining(","));
     }
 
     /**
@@ -149,16 +147,11 @@ public class SysUserServiceImpl implements ISysUserService
     public String selectUserPostGroup(String userName)
     {
         List<SysPost> list = postMapper.selectPostsByUserName(userName);
-        StringBuffer idsStr = new StringBuffer();
+        if (CollectionUtils.isEmpty(list))
-        for (SysPost post : list)
-        {
-            idsStr.append(post.getPostName()).append(",");
-        }
-        if (StringUtils.isNotEmpty(idsStr.toString()))
         {
-            return idsStr.substring(0, idsStr.length() - 1);
+            return StringUtils.EMPTY;
         }
-        return idsStr.toString();
+        return list.stream().map(SysPost::getPostName).collect(Collectors.joining(","));
     }
 
     /**