springboot返回数据封装类

 封装类的代码实现

package com.example.demo.model;

public class AjaxResult <T> {

    private static final int CODE_SUCCESS = 200;

    private static final int CODE_FAIL = 400;
    
    private static final String MSG_SUCCESS="success";
    private static final String MSG_FAIL="failed";

    private int code;
    private T data;
    private String msg;

    public AjaxResult(){

    }

    public AjaxResult(int code){
        this.code = code;
    }

    public AjaxResult(int code, T data){
        this.code = code;
        this.data = data;
    }

    public AjaxResult(int code, String msg){
        this.code = code;
        this.msg = msg;
    }
    public AjaxResult(int code, String msg,T data) {
    	this.code = code;
        this.msg = msg;
        this.data=data;
    }
    public static AjaxResult success(){
        return new AjaxResult(CODE_SUCCESS,MSG_SUCCESS);
    }

    public static AjaxResult success(Object data){
        return new AjaxResult(CODE_SUCCESS,MSG_SUCCESS, data);
    }

    public static AjaxResult fail(){
        return new AjaxResult(CODE_FAIL, MSG_FAIL);
    }


    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }
}

Controller的登录方法

@RequestMapping("/login")
	public AjaxResult login(@RequestParam("username") String username,@RequestParam("password") String password) {
	
		if(userService.isloginSuccess(username, password).isEmpty()) {
			return AjaxResult.fail();
		}
		List<UserModel> list=new ArrayList<>();
		list=userService.isloginSuccess(username, password);
		return AjaxResult.success(list);
	}