有两种方式可以解决日期转换Json问题:
1、(不推荐)局部修改,自定义注解进行将日期类型转换为Date类型。
2、(强烈推荐)全局修改,用MappingJackson2HttpMessageConverter配置在XML(SpringMVC)或者配置在Application.Java启动类(Spring boot、Spring cloud)。
配置在Application.Java启动类(Spring boot、Spring cloud):
@Bean public MappingJackson2HttpMessageConverter getMappingJackson2HttpMessageConverter() { MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter(); //设置日期格式 ObjectMapper objectMapper = new ObjectMapper(); SimpleDateFormat smt = new SimpleDateFormat("yyyy-MM-dd"); objectMapper.setDateFormat(smt); mappingJackson2HttpMessageConverter.setObjectMapper(objectMapper); //设置中文编码格式 List<MediaType> list = new ArrayList<MediaType>(); list.add(MediaType.APPLICATION_JSON_UTF8); mappingJackson2HttpMessageConverter.setSupportedMediaTypes(list); return mappingJackson2HttpMessageConverter; }
配置在XML(SpringMVC):
<mvc:annotation-driven> <mvc:message-converters> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"> <property name="objectMapper" ref="customObjectMapper"/> </bean> </mvc:message-converters> </mvc:annotation-driven>
自定义objectMapper:
public class CustomObjectMapper extends ObjectMapper { public CustomObjectMapper() { CustomSerializerFactory factory = new CustomSerializerFactory(); factory.addGenericMapping(Date.class, new JsonSerializer<Date>() { @Override public void serialize(Date value, JsonGenerator jsonGenerator, SerializerProvider provider) throws IOException, JsonProcessingException { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); jsonGenerator.writeString(sdf.format(value)); } }); this.setSerializerFactory(factory); } }
注意:如果想要单个bean的某个日期字段显示年月日时分秒的话,只需要在对应日期的get方法上添加@JsonFormat(pattern="yyyy-MM-dd HH:mm:ss")即可。
转 : https://my.oschina.net/u/3672057/blog/1844715