Spring Rest JSON Binding

I'm trying to create a Restful service with Spring.

A method accepts a "UserContext" object via argument i.e. @RequestBody.

The client sends the JSON object with content-type "application/json". But I get the error "HTTP/1.1 415 Unsupported Media Type".

..even when the client sends a null "{}" JSON object.

My controller:

@Controller
@RequestMapping(value = "/entityService")
class RestfulEntityService {

  @Resource
  private EntityService entityService;

  @ResponseBody
  @RequestMapping(value = "/getListOfEntities", method = RequestMethod.POST)
  public List<Entity> getListOfEntities(@RequestBody UserContext userContext) {
    System.out.println(userContext);
    return null;
  }
}

UserContext.java

public class UserContext {

    private Long userId;

    private String userName;

    private UserAddress userAddress;

    private CustomerInfo customerInfo;

}

Application context:

  <开发者_开发技巧;bean id="xstreamMarshaller" class="org.springframework.oxm.xstream.XStreamMarshaller"/>
  <bean id="xmlMessageConverter"
        class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter">
    <constructor-arg ref="xstreamMarshaller"/>
    <property name="supportedMediaTypes" value="application/xml"/>
  </bean>

  <bean id="jsonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
    <property name="supportedMediaTypes" value="application/json"/>
  </bean>

  <bean
    class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="messageConverters">
      <util:list id="beanList">
        <ref bean="xmlMessageConverter" />
        <ref bean="jsonHttpMessageConverter"/>
      </util:list>
    </property>
  </bean>

  <mvc:annotation-driven/>

Struggling with this for a while. Help will be appreciated!

Try with a Accept header in your request of application/json, based on what I see with the messageconverter samples at mvc-showcase

This is a related question: use spring mvc3 @ResponseBody had 415 Unsupported Media Type why?

This is probably not the main problem, but your UserContext bean would not work as is, if it only has private fields. There are multiple ways to resolve this; from making fields public, to adding @JsonProperty for each, or just changing minimum visibility jackson uses for detecting property fields (@JsonAutoDetect annotation).

But with empty JSON, this should not give problems; and if there was an issue, you should see different kind of error/exception (I assume).

Make sure that you have the Jackson libraries on your classpath, If you're using maven, define the following on your pom.xml:

<dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-core-asl</artifactId>
    <version>1.7.5</version>
    <scope>compile</scope>
 </dependency>
 <dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-mapper-asl</artifactId>
    <version>1.7.5</version>
    <scope>compile</scope>
 </dependency>