Java序列化JSON丢失精度问题的解决方法(修复Long类型太长)

    @JsonSerialize(using=ToStringSerializer.class)
    private Long createdBy;

Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
    MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();

    ObjectMapper objectMapper = new ObjectMapper();
    
    SimpleModule simpleModule = new SimpleModule();
    simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
    simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
    objectMapper.reGISterModule(simpleModule);

    jackson2HttpMessageConverter.setObjectMapper(objectMapper);
    converters.add(jackson2HttpMessageConverter);
}

    @JsonSerialize(using = DateToLongSerializer.class)
    private Date createTiem;

public class DateToLongSerializer extends JsonSerializer<Date> {
    @Override
    public void serialize(Date date, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws ioException {
        jsonGenerator.writeNumber(date.getTime() / 1000);
    }
}