Springboot中如何使用Jackson

  @RequestMapping("/addUserInfo")
  public UserInfo addUserInfo(@RequestBody UserInfo userInfo){

  }

public class UserInfo {

  private String name;

  private String password;

  private Integer age;

  @JsonFormat(pattern = "yyyy-MM-dd")
  private Date birth;

@Configuration
public class WebMvcConfig {

  @Bean
  MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {
    MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
    ObjectMapper objectMapper = new ObjectMapper();
    objectMapper.setDateFormat(new SimpleDateFormat("yyyy/MM/dd"));
    mappingJackson2HttpMessageConverter.setObjectMapper(objectMapper);
    return mappingJackson2HttpMessageConverter;
  }

}

 @ConditionalOnClass({ObjectMapper.class})
  @ConditionalOnBean({ObjectMapper.class})
  @ConditionalOnProperty(
    name = {"spring.mvc.converters.preferred-json-mapper"},
    havingValue = "jackson",
    matchIfMissing = true
  )
  static class MappingJackson2HttpMessageConverterConfiguration {
    MappingJackson2HttpMessageConverterConfiguration() {
    }

    @Bean
    @ConditionalOnMissingBean(
      value = {MappingJackson2HttpMessageConverter.class},
      ignoredType = {"org.springframework.hateoas.server.mvc.TypeConstrainedMappingJackson2HttpMessageConverter", "org.springframework.data.rest.webmvc.alps.AlpsJsonHttpMessageConverter"}
    )
    MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter(ObjectMapper objectMapper) {
      return new MappingJackson2HttpMessageConverter(objectMapper);
    }
  }

@ConditionalOnClass({Jackson2ObjectMapperBuilder.class})
  static class JacksonObjectMapperConfiguration {
    JacksonObjectMapperConfiguration() {
    }

    @Bean
    @Primary
    @ConditionalOnMissingBean
    ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {
      return builder.createXmlMapper(false).build();
    }
  }

@Configuration
public class WebMvcConfig {


  @Bean
  ObjectMapper jacksonObjectMapper() {
    ObjectMapper objectMapper = new ObjectMapper();
    objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd"));
    return objectMapper;
  }
}

  //测试jackSon
  public static void main(String[] args) throws JsonProcessingException {
    UserInfo userInfo = getTestUser();
    ObjectMapper objectMapper = new ObjectMapper();

    //将对象序列化为json字符串
    objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); //忽略为null的字段
    String userJsonString = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(userInfo);
    System.out.println(userJsonString);


    //将json反序列化为java对象
    objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    UserInfo userInfo2 = objectMapper.readValue(userJsonString, UserInfo.class);
    System.out.println(userInfo2);
  }