【LocalDateTime与Spring Mvc、Lombok、Jackson的坑】

坑1: Lombok的@Data + @Builder注解同时使用导致LocalDateTime无法格式化

如下接收参数实体类

@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@Builder
public class CampusAntigenInfo implements Serializable {

    private static final long serialVersionUID = 1L;

    @ApiModelProperty(value = "检测编号", example = "0124TESax15")
    private String antigenDetectionNo;


    @ApiModelProperty(value = "检测结果 0：阴性，1阳性，2无效", example = "0")
    private Integer antigenDetectionType;


    @ApiModelProperty(value = "检测地点 0：校内，1校外", example = "0")
    private String antigenDetectionAddress;


    @ApiModelProperty(value = "检测时间", example = "2022-05-10 09:25:41")
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
    private LocalDateTime antigenDetectionTime;

    private String photoUrl;



}

当@Data和@Builder注解同时使用时：会导致无参构造丢失
Lombok的@Builder注解带来的两大坑

同时会导致时间类型字段格式化失败！

• 解决方案：添加无参+全参构造器注解

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class CampusAntigenInfo implements Serializable {
 ..........
}

坑2: 使用@JsonForma无法格式化LocalDateTime

Jackson 默认不支持@JsonFormat格式化

• 方案1：需要引入 jsr310依赖

        <!--    解决localDateTime格式化问题    -->
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jsr310</artifactId>
        </dependency>

• 方案2：使用@@DateTimeFormat

	    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
	    private LocalDateTime antigenDetectionTime;

坑3： LocalDateTime 格式化必须要有时分秒！

如

	 @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd", timezone = "GMT+8")
	 private LocalDateTime antigenDetectionTime;

Spring Mvc 接口格式化时会报错！

• 一定要带时分秒！！！！

	@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
	private LocalDateTime antigenDetectionTime;

• 如果没有时分秒使用 LocalDate

	@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd", timezone = "GMT+8")
	private LocalDate antigenDetectionTime;