SpringBoot 中如何统一响应格式

今天药忘吃喽~ 2024-03-22 11:30 26阅读 0赞

> 在我们开发SpringBoot后端服务时，一般需要给前端统一响应格式，方便前端调试及配置错误提示等等。这篇文章讲讲实际工作中统一响应格式是如何做的。

#### 一、统一响应基础类 ####

在项目中对应工具类或Vo层来创建我们的统一响应类

![format_png][]

`ResponseResult`:

import com.fasterxml.jackson.annotation.JsonInclude;
    import com.zhang.enums.AppHttpCodeEnum;
    
    import java.io.Serializable;
    
    @JsonInclude(JsonInclude.Include.NON_NULL)
    public class ResponseResult<T> implements Serializable {
        private Integer code;
        private String msg;
        private T data;
    
        public ResponseResult() {
            this.code = AppHttpCodeEnum.SUCCESS.getCode();
            this.msg = AppHttpCodeEnum.SUCCESS.getMsg();
        }
    
        public ResponseResult(Integer code, T data) {
            this.code = code;
            this.data = data;
        }
    
        public ResponseResult(Integer code, String msg, T data) {
            this.code = code;
            this.msg = msg;
            this.data = data;
        }
    
        public ResponseResult(Integer code, String msg) {
            this.code = code;
            this.msg = msg;
        }
    
        public static ResponseResult errorResult(int code, String msg) {
            ResponseResult result = new ResponseResult();
            return result.error(code, msg);
        }
    
        public static ResponseResult okResult() {
            ResponseResult result = new ResponseResult();
            return result;
        }
    
        public static ResponseResult okResult(int code, String msg) {
            ResponseResult result = new ResponseResult();
            return result.ok(code, null, msg);
        }
    
        public static ResponseResult okResult(Object data) {
            ResponseResult result = setAppHttpCodeEnum(AppHttpCodeEnum.SUCCESS, AppHttpCodeEnum.SUCCESS.getMsg());
            if (data != null) {
                result.setData(data);
            }
            return result;
        }
    
        public static ResponseResult errorResult(AppHttpCodeEnum enums) {
            return setAppHttpCodeEnum(enums, enums.getMsg());
        }
    
        public static ResponseResult errorResult(AppHttpCodeEnum enums, String msg) {
            return setAppHttpCodeEnum(enums, msg);
        }
    
        public static ResponseResult setAppHttpCodeEnum(AppHttpCodeEnum enums) {
            return okResult(enums.getCode(), enums.getMsg());
        }
    
        private static ResponseResult setAppHttpCodeEnum(AppHttpCodeEnum enums, String msg) {
            return okResult(enums.getCode(), msg);
        }
    
        public ResponseResult<?> error(Integer code, String msg) {
            this.code = code;
            this.msg = msg;
            return this;
        }
    
        public ResponseResult<?> ok(Integer code, T data) {
            this.code = code;
            this.data = data;
            return this;
        }
    
        public ResponseResult<?> ok(Integer code, T data, String msg) {
            this.code = code;
            this.data = data;
            this.msg = msg;
            return this;
        }
    
        public ResponseResult<?> ok(T data) {
            this.data = data;
            return this;
        }
    
        public Integer getCode() {
            return code;
        }
    
        public void setCode(Integer code) {
            this.code = code;
        }
    
        public String getMsg() {
            return msg;
        }
    
        public void setMsg(String msg) {
            this.msg = msg;
        }
    
        public T getData() {
            return data;
        }
    
        public void setData(T data) {
            this.data = data;
        }
    }
    复制代码

里面还有用到一个响应的枚举类`AppHttpCodeEnum`，接下来我们创建这个枚举类

#### 二、响应枚举类 ####

![format_png 1][]

`AppHttpCodeEnum`:

public enum AppHttpCodeEnum {
        // 成功
        SUCCESS(200, "操作成功"),
        // 登录
        NEED_LOGIN(401, "需要登录后操作"),
        NO_OPERATOR_AUTH(403, "无权限操作"),
        SYSTEM_ERROR(500, "出现错误"),
        USERNAME_EXIST(501, "用户名已存在"),
        PHONENUMBER_EXIST(502, "手机号已存在"), EMAIL_EXIST(503, "邮箱已存在"),
        REQUIRE_USERNAME(504, "必需填写用户名"),
        CONTENT_NOT_NULL(506, "评论内容不能为空"),
        FILE_TYPE_ERROR(507, "文件类型错误"),
        USERNAME_NOT_NULL(508, "用户名不能为空"),
        NICKNAME_NOT_NULL(509, "昵称不能为空"),
        PASSWORD_NOT_NULL(510, "密码不能为空"),
        EMAIL_NOT_NULL(511, "邮箱不能为空"),
        NICKNAME_EXIST(512, "昵称已存在"),
        LOGIN_ERROR(505, "用户名或密码错误");
        int code;
        String msg;
    
        AppHttpCodeEnum(int code, String errorMessage) {
            this.code = code;
            this.msg = errorMessage;
        }
    
        public int getCode() {
            return code;
        }
    
        public String getMsg() {
            return msg;
        }
    }
    复制代码

一般我们在这个枚举类中管理需要响应的错误`code`及`msg`

#### 三、使用 ####

在对应的controller或者service里面使用统一响应类

![format_png 2][]

*  成功: `ResponseResult.okResult()`
 *  失败: `ResponseResult.errorResult(AppHttpCodeEnum.SYSTEM_ERROR)`, 参数传入我们定义的`响应枚举类`

[format_png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/c4637513374444b3b2a41ddbb27830a0.png
[format_png 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/a6bfce74f5a24285bf6244a7a57f8cfe.png
[format_png 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/446d153fde5f4645addf3b5efa6fa761.png