1.✨前后端时间不一致

解决方法1：在实体类属性上添加

    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")

解决方法2：springboot配置文件中

spring:
	jackson:
		date-format: yyyy-MM-dd HH:mm:ss
		time-zone: GMT+8

2.定义返回标准格式

思路

标配：
code状态码： 后端定义统一的状态码
message描述: 本次接口结果调用的描述
data数据: 返回的数据
拓展：
temestamp: 接口调用时间

步骤

新建枚举类 举值-构造-遍历

@Getter
public enum ReturnCodeEnum
{	
	//#######################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");
	
	//########################构造#########################

    /**自定义状态码**/
    private final String code;
    /**自定义描述**/
    private final String message;

    ReturnCodeEnum(String code, String message){
        this.code = code;
        this.message = message;
    }
	
	//#######################遍历############################

    //遍历枚举V1
    public static ReturnCodeEnum getReturnCodeEnum(String code)
    {
        for (ReturnCodeEnum element : ReturnCodeEnum.values()) {
            if(element.getCode().equalsIgnoreCase(code))
            {
                return element;
            }
        }
        return null;
    }
    //遍历枚举V2
    public static ReturnCodeEnum getReturnCodeEnumV2(String code)
    {
        return Arrays.stream(ReturnCodeEnum.values()).filter(x -> x.getCode().equalsIgnoreCase(code)).findFirst().orElse(null);
    }


    /*public static void main(String[] args)
    {
        System.out.println(getReturnCodeEnumV2("200"));
        System.out.println(getReturnCodeEnumV2("200").getCode());
        System.out.println(getReturnCodeEnumV2("200").getMessage());
    }*/

新建统一返回对象

@Data
@Accessors(chain = true)
public class ResultData<T> {

    private String code;/** 结果状态 ,具体状态码参见枚举类ReturnCodeEnum.java*/
    private String message;
    private T data;
    private long timestamp ;


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

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

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

        return resultData;
    }

}

3.全局异常处理

@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler
{
    /**
     * 默认全局异常处理。
     * @param e the e
     * @return ResultData
     */
    @ExceptionHandler(RuntimeException.class)
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public ResultData<String> exception(Exception e) {
        System.out.println("----come in GlobalExceptionHandler");
        log.error("全局异常信息exception:{}", e.getMessage(), e);
        return ResultData.fail(ReturnCodeEnum.RC500.getCode(),e.getMessage());
    }
}