从xml映射到Java配置的Jackson2HttpMessageConverter出现故障

Question

I change my application from a xml-based configuration to a java-based configuration. In the java-based configuration, I get below error, which I don't get in the xml-based configuration. What I'm missing in the java configuration? Please assist.

The method throwing this error:

 response = restTemplate.exchange(uri.toUri(), HttpMethod.GET, entity, UserProfiles.class);

The error :

nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of com.mycompany.wsg.profile.model.v26.gen.ListItemDef: no String-argument constructor/factory method to deserialize from String value ('U-71155f93-8413-457c-a045-256dc6ab0a93@poims001.ucc2.ucc.stgsip.t-mobile.com')

Answer 1

The issue was definitely the java configuration. Here's how I resolve it:

public class SpringWebConfig extends WebMvcConfigurationSupport {

  ....//unrelated configuration here

 @Bean
    public RestTemplate restTemplate()
    {
        RestTemplate restTemplate =  new RestTemplate(httpClientFactory());

        restTemplate.setMessageConverters(getMessageConverters());

        return restTemplate;
    }


 @Override
    public void configureMessageConverters(
      List<HttpMessageConverter<?>> converters) {

        converters.add(createXmlHttpMessageConverter());
        converters.add(new MappingJackson2HttpMessageConverter());

        super.configureMessageConverters(converters);
    }

    private HttpMessageConverter<Object> createXmlHttpMessageConverter() {
        MarshallingHttpMessageConverter xmlConverter = 
          new MarshallingHttpMessageConverter(jaxb2Marshaller(), jaxb2Marshaller());

        return xmlConverter;
    }
}

Hope this helps someone else