2.3.2、通用类Msg

package com.wzy.pojo;
import com.github.pagehelper.PageInfo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.util.HashMap;
import java.util.Map;
//通用的返回类
@AllArgsConstructor
@NoArgsConstructor
@Data
public class Msg {
    //状态码 例：100成功 200失败
    private int code;
    //提示信息
    private String msg;
    //用户返回浏览器的数据
    private Map<String,Object> extend = new HashMap<>();
    public static Msg success(){
        Msg result = new Msg();
        result.setCode(100);
        result.setMsg("处理成功！");
        return result;
    }
    public static Msg fail(){
        Msg result = new Msg();
        result.setCode(200);
        result.setMsg("处理失败！");
        return result;
    }
    public Msg add(String key, PageInfo pageInfo) {
        this.getExtend().put(key,pageInfo);
        return this;
    }
}