方法一:配置

这种方式只对 Date 类型生效

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

方法二:@JsonFormat

部分格式化:@JsonFormat 注解需要用在实体类的时间字段上，对应的字段才能进行格式化。

@Getter
@Setter
public class TestTime {

    @JsonFormat(locale = "zh", timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss")
    private Date date;

    private LocalDateTime localDateTime;

    @JsonFormat(locale = "zh", timezone = "GMT+8", pattern = "yyyyMMdd")
    private LocalDate localDate;

    @JsonFormat(locale = "zh", timezone = "GMT+8", pattern = "HHmmss")
    private LocalTime localTime;

}

方法三:@JsonComponent

使用 @JsonComponent 注解自定义一个全局格式化类，分别对 Date 和 LocalDate 类型做格式化处理。

@JsonComponent
public class JsonComponentConfig {

    @Value("${spring.jackson.date-format:yyyy-MM-dd HH:mm:ss}")
    private String pattern;

    /**
     * date 类型全局时间格式化
     */
    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilder() {
        return builder -> {
            TimeZone tz = TimeZone.getTimeZone("UTC");
            DateFormat df = new SimpleDateFormat(pattern);
            df.setTimeZone(tz);
            builder.failOnEmptyBeans(false)
                    .failOnUnknownProperties(false)
                    .featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
                    .dateFormat(df);
        };
    }

    /**
     * LocalDate 类型全局时间格式化
     */
    public LocalDateTimeSerializer localDateTimeDeserializer() {
        return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(pattern));
    }

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        return builder -> builder.serializerByType(LocalDateTime.class, localDateTimeDeserializer());
    }

}

完整项目：

新增OrderInfo

public class OrderInfo {
    //@JsonFormat(locale = "zh", timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss")
    private LocalDateTime createTime;

    //@JsonFormat(locale = "zh", timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss")
    private Date updateTime;

    public LocalDateTime getCreateTime() {
        return createTime;
    }

    public void setCreateTime(LocalDateTime createTime) {
        this.createTime = createTime;
    }

    public Date getUpdateTime() {
        return updateTime;
    }

    public void setUpdateTime(Date updateTime) {
        this.updateTime = updateTime;
    }
}

新增controller

@RestController
public class TimeTestClass {

    @GetMapping("/timeTest")
    public OrderInfo timeTest(){
        OrderInfo orderInfo = new OrderInfo();
        orderInfo.setCreateTime(LocalDateTime.now());
        orderInfo.setUpdateTime(new Date());
        return  orderInfo;
    }
}

添加依赖

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.12.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.12.3</version>
</dependency>