返回格式如下：

{ "code": 200/400,

    "msg": "成功"/"失败",

    "total": n,

    "data": [ {}，{}]}

1.在common中新增Result 类，代码如下

package com.xxx0523.common;
import lombok.Data;
@Data
public class Result {
    private int code;//编码 200.400
    private  String msg;//成功、失败
    private  Long total;//总记录数
    private  Object data;//数据
    private  String language;
    private static Result result (int code,String msg,String language,Long total,Object data){
        Result res =new Result();
        res.setLanguage(language);
        res.setData(data);
        res.setMsg(msg);
        res.setCode(code);
        res.setTotal(total);
        return  res;
    }
    public static  Result fail(){
        return result(400,"失败","中文",0L,null);
    }
    public static  Result suc(){
        return result(200,"成功","中文",0L,null);
    }
    public static  Result suc( Object data){
        return result(200,"成功","中文",0L,data);
    }
    public static  Result suc( Object data,Long total){
        return result(200,"成功","中文",total,data);
    }

}

2.更改用户控制类的代码

重启启动类并在在apipost中执行查看返回结果：