What is the method of permission management in Java front-end and back-end separation?

1. Front-end interface

1.1 Button

With the help of the table part in elementui

<template slot-scope="scope">
    <el-button @click="permissionClick(scope.row)" type="primary" size="mini">修改权限222</el-button>
</template>

1.2 Dialog tree control

With the help of the table part in elementui Dialog and tree structure

 <!--自写权限222-->
        <el-dialog
                title="提示"
                :visible.sync="dialogPerVisible"
                width="30%"
                >
            <!--
                :default-expanded-keys="[2, 3]"默认展开项
                :default-checked-keys="[5]"默认选中项
            -->
            <el-tree
                    :data="treeData"
                    show-checkbox
                    node-key="id"
                    :props="defaultProps">
            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogPerVisible = false">取 消</el-button>
                <el-button type="primary" @click="dialogPerVisible = false">确 定</el-button>
            </span>
        </el-dialog>

 data(){
            return{
                //自写权限树遮罩层
                dialogPerVisible:false,
                treeData:[],
                defaultProps: {
                    children: 'children',
                //如果不显示命名，注意看请求结果是否为label不是则修改‘label'中的内容
                    label: 'label'
                }
            }
        }

methods:{
            //自写权限点击
            permissionClick(row){
              this.dialogPerVisible=true;
              this.$http.get("/system/permission/findPermessionByRoleId/"+row.id).then(result=>{
                  this.treeData=result.data.data.treeData;
              })
            }
        }

2. Back-end operation

2.1 controller layer

//自写权限树
    @GetMapping("findPermessionByRoleId/{roleId}")
    public CommonResult findPermessionByRoleId(@PathVariable String roleId){
        return iPermissionService.findPermessionByRoleId(roleId);
    }

2.2 serviceImpl layer

Use TODO here to do it later Search whether this business is completed

 //自写树结构的获取
    @Override
    public CommonResult findPermessionByRoleId(String roleId) {
        //查询所有的权限
        QueryWrapper<Permission> wrapper=new QueryWrapper<>();
        //逻辑删除列考虑在内 还有一个状态列数据库暂未考虑
        wrapper.eq("is_deleted",0);
        List<Permission> permissionList = permissionMapper.selectList(wrapper);
        //设置层级关系
        List<Permission> firstMenus=new ArrayList<>();
        for (Permission first:permissionList) {
            //int
            if(first.getPid().equals("1")){
                firstMenus.add(first);
            }
        }
        //为一级菜单设置二级菜单
        for (Permission first : firstMenus) {
            //根据一级菜单id 查询 该菜单的二级菜单，如果出现不确定有几级菜单 那么我们可以使用方法的递归调用
            first.setChildren(findChildren(permissionList,first.getId()));
        }
        //TODO根据角色查询该角色具有的权限id
        Map<String,Object> map=new HashMap<>();
        //treeData为前端要接收的值
        map.put("treeData",firstMenus);
        return new CommonResult(2000,"查询成功",map);
    }
    //方法递归
    public void getCheckKey(Permission p,List<String> list){
        if(p.getChildren() == null || p.getChildren().size() == 0){
            list.add(p.getId());
            return;
        }
        List<Permission> children = p.getChildren();
        for (Permission per : children){
            getCheckKey(per, list);
        }
    }

2.3 Result display

2.4 Check the corresponding permission menu (using an intermediate table)

2.4.1 Back-end processing (permission echo)

Use mybatis-plus to generate an intermediate table (rolePermission)

Relative Previously added the content of querying the permission id of the role based on the role

//调中间层
    @Autowired
    private IRolePermissionService iRolePermissionService;
    //自写树结构的获取
    @Override
    public CommonResult findPermessionByRoleId(String roleId) {
        //查询所有的权限
        QueryWrapper<Permission> wrapper=new QueryWrapper<>();
        //逻辑删除列考虑在内 还有一个状态列数据库暂未考虑
        wrapper.eq("is_deleted",0);
        List<Permission> permissionList = permissionMapper.selectList(wrapper);
        //设置层级关系
        List<Permission> firstMenus=new ArrayList<>();
        for (Permission first:permissionList) {
            //int
            if(first.getPid().equals("1")){
                firstMenus.add(first);
            }
        }
        //为一级菜单设置二级菜单
        for (Permission first : firstMenus) {
            //根据一级菜单id 查询 该菜单的二级菜单，如果出现不确定有几级菜单 那么我们可以使用方法的递归调用
            first.setChildren(findChildren(permissionList,first.getId()));
        }
        //根据角色查询该角色具有的权限id
        QueryWrapper<RolePermission> wrapper1=new QueryWrapper<>();
        //根据角色id获得权限
        wrapper1.eq("role_id",roleId);
        List<RolePermission> list = iRolePermissionService.list(wrapper1);
        //由集合转换为查询permissionId
        List<String> collect = list.stream().map(item -> item.getPermissionId()).distinct().collect(Collectors.toList());
        Map<String,Object> map=new HashMap<>();
        //treeData为前端要接收的值
        map.put("treeData",firstMenus);
        map.put("checkIds",collect);
        return new CommonResult(2000,"查询成功",map);
    }
    //方法递归
    public void getCheckKey(Permission p,List<String> list){
        if(p.getChildren() == null || p.getChildren().size() == 0){
            list.add(p.getId());
            return;
        }
        List<Permission> children = p.getChildren();
        for (Permission per : children){
            getCheckKey(per, list);
        }
    }

2.4.2 Front-end processing

##

methods:{
            //自写权限点击
            permissionClick(row){
              this.dialogPerVisible=true;
              this.$http.get("/system/permission/findPermessionByRoleId/"+row.id).then(result=>{
                  this.treeData=result.data.data.treeData;
                  setTimeout(()=>{
                      result.data.data.checkIds.forEach(value=>{
                          this.$refs.rootTree.setChecked(value,true,false);
                      })
                  },100)
              })
            }
}

Click the confirmation processing of the mask layer

<el-button type="primary" @click="confirmFen()">确 定</el-button>

Add role id

When you click OK

 methods:{
            //自写权限遮罩层确定
            confirmFen(){
                //1.获取全选和半选的树 获取对象
               var checkedNodes = this.$refs.rootTree.getCheckedNodes(false,true);
               //console.log(checkedNodes)
                var ids=[];
                checkedNodes.forEach(item=>{
                    ids.push(item.id);
                })
                //console.log(ids)
                this.$http.post("/system/rolePermission/"+this.roleId,ids).then(result=>{
                    if(result.data.code===2000){
                        this.dialogPerVisible=false;
                        this.$message.success("分配权限成功");
                    }
                })
            }
}

The result printed by console.log (the second ids)

2.4.3 Back-end processing (determine modification permissions)

controller layer

//自写权限树
    @GetMapping("findPermessionByRoleId/{roleId}")
    public CommonResult findPermessionByRoleId(@PathVariable String roleId){
        return iPermissionService.findPermessionByRoleId(roleId);
    }

serviceImpl layer

 @Override
    @Transactional//事务
    public CommonResult fen(String roleId, List<String> ids) {
        //删除roleid对应的权限
        QueryWrapper<RolePermission> wrapper=new QueryWrapper<>();
        wrapper.eq("role_id",roleId);
        this.remove(wrapper);
        //添加
        List<RolePermission> collect = ids.stream().map(item -> new RolePermission(null, roleId, item, 0, LocalDateTime.now(), LocalDateTime.now())).collect(Collectors.toList());
        this.saveBatch(collect);
        return new CommonResult(2000,"分配成功",null);
    }

Entity class addition

Startup class added

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