java开发对controller返回数据统一封装结果集

在日常开发中前后端对接一般要约定好某种规则，比如说一个接口甲同学返回code=100表示返回成功数据，乙同学返回code=200表示返回成功数据，就会形成很多各自的规则，前端对接起来也麻烦，因此针对这种情况要进行同一返回的规则，对code和message进行约定好

用到的工具类如下，可直接拿走：

Result:

package com.atguigu.yygh.common.result;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

/**
 * 全局统一返回结果类
 */
@Data
@ApiModel(value = "全局统一返回结果")
public class Result<T> {

    @ApiModelProperty(value = "返回码")
    private Integer code;

    @ApiModelProperty(value = "返回消息")
    private String message;

    @ApiModelProperty(value = "返回数据")
    private T data;

    public Result(){}

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

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

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

    /**
     * 操作成功
     * @param data
     * @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;
    }

    public boolean isOk() {
        if(this.getCode().intValue() == ResultCodeEnum.SUCCESS.getCode().intValue()) {
            return true;
        }
        return false;
    }
}

ResultCodeEnum:

package com.atguigu.yygh.common.result;

import lombok.Getter;

/**
 * 统一返回结果状态信息类
 */
@Getter
public enum ResultCodeEnum {

    SUCCESS(200,"成功"),
    FAIL(201, "失败"),
    PARAM_ERROR( 202, "参数不正确"),
    SERVICE_ERROR(203, "服务异常"),
    DATA_ERROR(204, "数据异常"),
    DATA_UPDATE_ERROR(205, "数据版本异常"),

    LOGIN_AUTH(208, "未登陆"),
    PERMISSION(209, "没有权限"),

    CODE_ERROR(210, "验证码错误"),
//    LOGIN_MOBLE_ERROR(211, "账号不正确"),
    LOGIN_DISABLED_ERROR(212, "改用户已被禁用"),
    REGISTER_MOBLE_ERROR(213, "手机号已被使用"),
    LOGIN_AURH(214, "需要登录"),
    LOGIN_ACL(215, "没有权限"),

    URL_ENCODE_ERROR( 216, "URL编码失败"),
    ILLEGAL_CALLBACK_REQUEST_ERROR( 217, "非法回调请求"),
    FETCH_ACCESSTOKEN_FAILD( 218, "获取accessToken失败"),
    FETCH_USERINFO_ERROR( 219, "获取用户信息失败"),
    //LOGIN_ERROR( 23005, "登录失败"),

    PAY_RUN(220, "支付中"),
    CANCEL_ORDER_FAIL(225, "取消订单失败"),
    CANCEL_ORDER_NO(225, "不能取消预约"),

    HOSCODE_EXIST(230, "医院编号已经存在"),
    NUMBER_NO(240, "可预约号不足"),
    TIME_NO(250, "当前时间不可以预约"),

    SIGN_ERROR(300, "签名错误"),
    HOSPITAL_OPEN(310, "医院未开通，暂时不能访问"),
    HOSPITAL_LOCK(320, "医院被锁定，暂时不能访问"),
    PARAM_ILL(555,"参数异常"),
    PARAM_ILL2(555,"参数异常2"),
    ;

    private Integer code;
    private String message;

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

controller调用如下所示：