springboot jackson 将date转成long

依赖

 <jackson.version>2.12.5</jackson.version>

  <!-- Jackson -->
     <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-databind</artifactId>
     </dependency>
     <!-- Jackson -->
     <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-annotations</artifactId>
     </dependency>
     <dependency>
         <groupId>com.fasterxml.jackson.datatype</groupId>
         <artifactId>jackson-datatype-jsr310</artifactId>
     </dependency>

配置文件

spring:
	jackson:
    	serialization:
      		write-dates-as-timestamps: true

代码配置

@Configuration
public class JacksonConfig {

    @Bean
    public ObjectMapper objectMapper() {

        ObjectMapper mapper = new Jackson2ObjectMapperBuilder()
                .serializerByType(Long.TYPE, ToStringSerializer.instance)
                .serializerByType(Long.class, ToStringSerializer.instance)
                .createXmlMapper(false)
                .build();
        // 当接收到未定义的枚举类型时, 将枚举字段设为NULL
        mapper.configure(DeserializationFeature.READ_UNKNOWN_ENUM_VALUES_AS_NULL, true);
        // 设置时区
        mapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));
        // 设置日期格式
        mapper.setDateFormat(new SimpleDateFormat(DatePattern.NORM_DATETIME_PATTERN));

        // 序列化成时间戳时间
        mapper.configure(SerializationFeature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS, true);
        mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, true);
        return mapper;
    }
}