dtree删除父节点和子节点

需求：在删除父节点时子节点也要一并删除，子节点可以单独删除

注意：当表中有外键关系时，这种方式可能不行，可能会报错！！！！！！

效果图1：删除父节点

效果图2：子节点

前端代码：

<!-- 行内工具栏 -->
    <script type="text/html" id="listBar">
        <a class="layui-btn layui-btn-xs layui-btn-danger" lay-event="del"><i class="layui-icon layui-icon-delete"></i>删除</a>
    </script>
</script>
 //监听行工具事件
        table.on('tool(TableList)', function(obj){
            var layEvent = obj.event,
                data = obj.data;
            switch(layEvent) {
                case 'del':
                    deleteDept(data);
                    break;
                case 'edit':
                    edit(data);
                    break;

            }
        });

 // 删除
        function deleteDept(data){
            // 判断有没有子节点
            var aa = '';
            $.post({
              // 判断有没有父节点下有没有子节点
                url: "/dept/isNodeChildrens",
                data: {"id" : data.id},
                async: false,
                success:function (result) {
                    if (result.success){
                        aa = '确定删除【'+data.title+'】和其子部门吗？';
                    }else{
                        aa = '确定删除【'+data.title+'】吗？';
                    }
                }
            })

            layer.confirm(aa,{icon:3, title:'提示信息'},function(index){
                $.post("/dept/deletedept",{
                    id : data.id,
                },function(data){
                    if (data.code == 200){
                        layer.msg(data.msg);
                        tableIns.reload();
                        //刷新左侧部门数
                        window.parent.left.dateTree.reload();
                    }else{
                        layer.msg(data.msg);
                    }
                    layer.close(index);
                })
            });
        }
  </script>

后端代码：

@RestController
@RequestMapping("dept")
public class DeptController {

    @Autowired
    private DeptService deptService;


    // 判断有没有父节点下有没有子节点
    @RequestMapping("isNodeChildrens")
    public Map<String,Object>isNodeChildrens(Integer id){
        Map<String,Object>map=new HashMap<>();
        List<Integer>idlist=deptService.isNodeChildrens(id);
        if(idlist.size()>0){
            //返回状态码用于提示框
            map.put("success",true);
        }
        return map;
    }


    //删除部门
    @RequestMapping("deletedept")
    public ResultObj deletedept(Integer id){
        try {
            deptService.deletedept(id);
            return ResultObj.DELETE_SUCCESS;
        } catch (BindingException e) {
            e.printStackTrace();
            return ResultObj.DELETE_ERROR;
        }
    }


}

在DeptMapper.xml中SQL语句

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="xxx.xx.mapper.DeptMapper">
    <delete id="deletedept">
        delete from sys_dept where id=#{id} or pid=#{id}
    </delete>
   <select id="isNodeChildrens" resultType="int">
       select * from sys_dept d where d.pid = #{id}
   </select>
</mapper>