springboot项目中Java8时间问题和Long类型丢精度问题解决

  long 类型在接口中传输会使最后几位变0

LocalDateTime 类型会把年月日时分秒拆成每个字段 不符合我们之间需要的格式 在配置中添加专门的序列化格式（如果之间项目里面有配置过 MappingJackson2HttpMessageConverter ）就直接在里面加对应类型的序列化方式就可以

@Configuration
public class WebConfiguration implements WebMvcConfigurer {
	
	@Override
	public void configureMessageConverters(List> converters) {
		MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
		ObjectMapper objectMapper = new ObjectMapper();
		SimpleModule simpleModule = new SimpleModule();
		//long类型处理
		simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
		simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
		//时间
		simpleModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(dateTimeFormat)));
		simpleModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(dateFormat)));
		objectMapper.registerModule(simpleModule);
		jackson2HttpMessageConverter.setObjectMapper(objectMapper);
		converters.add(0, jackson2HttpMessageConverter);
	}

	private static final String dateFormat = "yyyy-MM-dd";
	private static final String dateTimeFormat = "yyyy-MM-dd HH:mm:ss";

}