Java项目枚举类和返回对象

枚举类

package com.atguigu.cloud.resp;

import lombok.Getter;

import java.util.Arrays;


@Getter
public enum ResultCodeEnum {

    // 1. 举值
    /**操作失败**/
    RC999("999","操作XXX失败"),
    /**操作成功**/
    RC200("200","success"),
    /**服务降级**/
    RC201("201","服务开启降级保护,请稍后再试!"),
    /**热点参数限流**/
    RC202("202","热点参数限流,请稍后再试!"),
    /**系统规则不满足**/
    RC203("203","系统规则不满足要求,请稍后再试!"),
    /**授权规则不通过**/
    RC204("204","授权规则不通过,请稍后再试!"),
    /**access_denied**/
    RC403("403","无访问权限,请联系管理员授予权限"),
    /**access_denied**/
    RC401("401","匿名用户访问无权限资源时的异常"),
    RC404("404","404页面找不到的异常"),
    /**服务异常**/
    RC500("500","系统异常，请稍后重试"),
    RC375("375","数学运算异常，请稍后重试"),

    INVALID_TOKEN("2001","访问令牌不合法"),
    ACCESS_DENIED("2003","没有权限访问该资源"),
    CLIENT_AUTHENTICATION_FAILED("1001","客户端认证失败"),
    USERNAME_OR_PASSWORD_ERROR("1002","用户名或密码错误"),
    BUSINESS_ERROR("1004","业务逻辑异常"),
    UNSUPPORTED_GRANT_TYPE("1003", "不支持的认证模式");

    // 定义枚举类口诀：举值-构造-遍历

    // 2. 构造
    private final String code; // 自定义状态码
    private final String message; // 自定义描述信息

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

    // 3. 遍历
    // 3.1 传统版
    public static ResultCodeEnum getResultCodeEnum(String code){
        for (ResultCodeEnum element : ResultCodeEnum.values()) {
            if (element.getCode().equalsIgnoreCase(code)) {
                return element;
            }
        }
        return null;
    }
    
    // 3.2 stream流式计算版
    
//    public static ResultCodeEnum getResultCodeEnum(String code){
//        return Arrays.stream(ResultCodeEnum.values()).filter(x->x.getCode().equalsIgnoreCase(code)).findFirst().orElse(null);
//    }
    
}

返回对象

package com.atguigu.cloud.resp;

import lombok.Data;
import lombok.experimental.Accessors;

@Data
@Accessors(chain = true)
public class ResultData<T> {
    private String code;
    private String message;
    private T data;
    private long timestamp;

    public ResultData(){
        this.timestamp = System.currentTimeMillis();
    }

    public static <T> ResultData<T> success(T data){
        ResultData resultData = new ResultData<>();
        resultData.setCode(ResultCodeEnum.RC200.getCode());
        resultData.setMessage(ResultCodeEnum.RC200.getMessage());
        resultData.setData(data);
        return resultData;
    }

    public static <T> ResultData<T> fail(String code, String message){
        ResultData resultData = new ResultData<>();
        resultData.setCode(code);
        resultData.setMessage(message);
        resultData.setData(null);
        return resultData;
    }
}