springboot 返回统一json渲染格式的几种方式

原创已于 2023-01-11 14:17:29 修改 · 645 阅读

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#spring boot #java #后端

于 2022-12-03 17:55:33 首次发布

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本文介绍了一种用于统一处理HTTP响应的实用方法，包括定义错误码、使用枚举类及JSON封装类来简化前后端交互流程。

一实操案例方式1

1.1 使用

1.定义map类型

package com.ljf.spring.boot.demo.common;

import java.util.LinkedHashMap;
import java.util.Map;

/**
 * @ClassName: R
 * @Description: TODO
 * @Author: liujianfu
 * @Date: 2022/12/03 15:53:28 
 * @Version: V1.0
 **/
public class R {
    private Boolean success;
    private Integer code;
    private String message;
    private Map<String, Object> data = new LinkedHashMap<String, Object>();
    //把构造方法私有
    private R() {}

    //成功静态方法
    public static R ok() {
        R r = new R();
        r.setSuccess(true);
        r.setCode(ResultCode.SUCCESS);
        r.setMessage("成功");
        return r;
    }

    //失败静态方法
    public static R error() {
        R r = new R();
        r.setSuccess(false);
        r.setCode(ResultCode.ERROR);
        r.setMessage("失败");
        return r;
    }

    public R success(Boolean success){
        this.setSuccess(success);
        return this;
    }

    public R message(String message){
        this.setMessage(message);
        return this;
    }

    public R code(Integer code){
        this.setCode(code);
        return this;
    }

    public R data(String key, Object value){
        this.data.put(key, value);
        return this;
    }

    public R data(Map<String, Object> map){
        this.setData(map);
        return this;
    }
    public Boolean getSuccess() {
        return success;
    }

    public void setSuccess(Boolean success) {
        this.success = success;
    }

    public Integer getCode() {
        return code;
    }

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

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public Map<String, Object> getData() {
        return data;
    }

    public void setData(Map<String, Object> data) {
        this.data = data;
    }
}

2.定义错误编码

package com.ljf.spring.boot.demo.common;

public interface ResultCode {

    public static Integer SUCCESS = 20000; //成功

    public static Integer ERROR = 20001; //失败
}

3.使用

    @ResponseBody
    @GetMapping("/allMp")
    public R findAllUserByMp(
            @RequestParam(name = "pageNum", required = false, defaultValue = "1")
                    int pageNum,
            @RequestParam(name = "pageSize", required = false, defaultValue = "10")
                    int pageSize){
        System.out.println("进入查询......");
        return R.ok().data("items",userService.queryAllUserByMp(pageNum,pageSize));
    }

4.效果

二实操案例方式2

2.1 定义格式使用

1.定义一个枚举类

package com.atguigu.common.result;

import lombok.Getter;

@Getter
public enum ResultCodeEnum {

    SUCCESS(200,"成功"),
    FAIL(201, "失败"),
    SERVICE_ERROR(2012, "服务异常"),
    DATA_ERROR(204, "数据异常"),
    ILLEGAL_REQUEST(205, "非法请求"),
    REPEAT_SUBMIT(206, "重复提交"),
    ARGUMENT_VALID_ERROR(210, "参数校验异常"),

    LOGIN_AUTH(208, "未登陆"),
    PERMISSION(209, "没有权限"),
    ACCOUNT_ERROR(214, "账号不正确"),
    PASSWORD_ERROR(215, "密码不正确"),
    LOGIN_MOBLE_ERROR( 216, "账号不正确"),
    ACCOUNT_STOP( 217, "账号已停用"),
    NODE_ERROR( 218, "该节点下有子节点，不可以删除")
    ;

    private Integer code;

    private String message;

    private ResultCodeEnum(Integer code, String message) {
        this.code = code;
        this.message = message;
    }
}

2.定义一个封装json类

@Data
public class Result<T> {

    //返回码
    private Integer code;

    //返回消息
    private String message;

    //返回数据
    private T data;

    public Result(){}

    // 返回数据
    protected static <T> Result<T> build(T data) {
        Result<T> result = new Result<T>();
        if (data != null)
            result.setData(data);
        return result;
    }

    public static <T> Result<T> build(T body, Integer code, String message) {
        Result<T> result = build(body);
        result.setCode(code);
        result.setMessage(message);
        return result;
    }

    public static <T> Result<T> build(T body, ResultCodeEnum resultCodeEnum) {
        Result<T> result = build(body);
        result.setCode(resultCodeEnum.getCode());
        result.setMessage(resultCodeEnum.getMessage());
        return result;
    }

    public static<T> Result<T> ok(){
        return Result.ok(null);
    }

    /**
     * 操作成功
     * @param data  baseCategory1List
     * @param <T>
     * @return
     */
    public static<T> Result<T> ok(T data){
        Result<T> result = build(data);
        return build(data, ResultCodeEnum.SUCCESS);
    }

    public static<T> Result<T> fail(){
        return Result.fail(null);
    }

    /**
     * 操作失败
     * @param data
     * @param <T>
     * @return
     */
    public static<T> Result<T> fail(T data){
        Result<T> result = build(data);
        return build(data, ResultCodeEnum.FAIL);
    }

    public Result<T> message(String msg){
        this.setMessage(msg);
        return this;
    }

    public Result<T> code(Integer code){
        this.setCode(code);
        return this;
    }
}

3.controller类