转换json中的日期格式方法

方法1 注解方式定义pattern

方法2 注解自定义JsonDeserializer

public class DateJacksonConverter extends JsonDeserializer

方法3 配置MappingJackson2HttpMessageConverter

@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;
    }

或

@Configuration
public class ConverterConfig {
    //DateJacksonConverter extends JsonDeserializer<Date>
    @Bean
    public DateJacksonConverter dateJacksonConverter() {
        return new DateJacksonConverter();
    }
    //Jackson2ObjectMapperFactoryBean生产objectMapper
    @Bean
    public Jackson2ObjectMapperFactoryBean jackson2ObjectMapperFactoryBean(
    @Autowired
    DateJacksonConverter dateJacksonConverter) {
        Jackson2ObjectMapperFactoryBean jackson2ObjectMapperFactoryBean = new Jackson2ObjectMapperFactoryBean();
        jackson2ObjectMapperFactoryBean.setDeserializers(dateJacksonConverter);
        return jackson2ObjectMapperFactoryBean;
    }
    //注入上面产生的objectMapper
    @Bean
    public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter(@Autowired
    ObjectMapper objectMapper) {
        MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        mappingJackson2HttpMessageConverter.setObjectMapper(objectMapper);
        return mappingJackson2HttpMessageConverter;
    }
}

忽略null值：让Jackson和Gson对于Null的默认行为一致方法

或