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();
    /**
     * 序列换成json时,将所有的long变成string
     * 因为js中得数字类型不能包含所有的java long值
     */
    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);
}

/** 订单创建时间 */
    @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);
    }
}