Return JSON from RestTemplate

[Johnny B]

Dear all,

help me to understand how I should pass any object to restTemplate.post...() to send a json request to controller.

Here is a test method:

...
private RestTemplate restTemplate;
	
@BeforeClass
public void configure() {		
	restTemplate = new RestTemplate();
    	List<HttpMessageConverter<?>> list = new ArrayList<HttpMessageConverter<?>>();
    	list.add(new MappingJacksonHttpMessageConverter());
    	restTemplate.setMessageConverters(list);
}

...

@Test
public void post() {
	Person person = new Person();
	person.setName("Mr. Putin");
	Person res = restTemplate.postForObject("http://localhost:8080/rest-json/rest/person", person, Person.class);
	Assert.assertEquals(res.getName(), "Mr. Putin");
}
...

The line restTemplate.postForObject(...) returns org.springframework.web.client.HttpClientErrorExce ption: 415 Unsupported Media Type


Where is my mistake?

My spring config is:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	   xmlns:p="http://www.springframework.org/schema/p"
	   xmlns:context="http://www.springframework.org/schema/context"
	   xmlns:mvc="http://www.springframework.org/schema/mvc"
	   xsi:schemaLocation="http://www.springframework.org/schema/beans 
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context 
                           http://www.springframework.org/schema/context/spring-context.xsd
                           http://www.springframework.org/schema/mvc
                           http://www.springframework.org/schema/mvc/spring-mvc.xsd">


	<context:component-scan base-package="org.putin.rest.controller" />
	
	<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
	
	<mvc:annotation-driven />
	
	<bean id="viewResolver" class="org.springframework.web.servlet.view.BeanNameViewResolver" />
	
	<bean id="jsonView" class="org.putin.rest.view.MappingJacksonJsonPutinView" /> 
	
</beans>

MappingJacksonJsonPutinView is:

public class MappingJacksonJsonPutinView extends MappingJacksonJsonView {
	
	@SuppressWarnings("unchecked")
	@Override
	protected Object filterModel(Map<String, Object> model) {
		Object result = super.filterModel(model);
		if (!(result instanceof Map)) {
			return result;
		}

		Map map = (Map) result;
		if (map.size() == 1) {
			return map.values().toArray()[0];
		}
		return map;
	}

}

Finally, my controller is:

@Controller
public class PersonController {

	private Logger log = LoggerFactory.getLogger(this.getClass().getName());

	@RequestMapping(method=RequestMethod.POST, value="/person")
	public ModelAndView post(@RequestBody Person person) {
		log.info("Received person: " + person.toString());
		return new ModelAndView("jsonView").addObject(person);
	}
}

BTW, restTemplate.getForObject(...) works well.

Thanks in advance.

Johnny

[Johnny B]

Hi guys, any idea?

[guznik]

Hi,

I guess you get this error because you don't set the "Accept" header in the request, so on the server side the request is not dispatched as you expect.

I encountered a similar problem trying to use RestTemplate, and apparently it is not yet possible to set the request headers (please correct me if I'm wrong about that), so I used Apache HTTP Client instead.

Another option is to use suffix as an alternative to the "Accept" header on the server side, for example use ".json" URL suffix to act the same as "text/json" accept header as demonstrated here: http://static.springsource.org/sprin...epresentations

[basha]

Hi guznik,

We tried for the same but not able to find the solution so, requesting to provide the changes that are to be done at the server side as well as the client side.


Thanks!
Basha

[a184878]

Hi Guys,

can you plz help me out for below isuues.

* can we pass more than one request object (userdefined object not predifined)
through postForObject of restTemplate? if yes plz let me know.

* i am using restTemplate.postForObject(url,myProduct,DefaultSt ock.class);
with MappingJacksonMessageConverter and sending myProduct (userdefined object) as a request object.
In controller i am receiving this object as String i.e Json object and then i need to convert this json object to java object below is the code in controller
@RequestMapping(method = RequestMethod.POST , value="/stock/", headers="Accept=application/json")
public @ResponseBody DefaultStock getDecreaseStock(@RequestBody String product)

my question can i receive this myProduct object as a product instead of stiring ?
like this
@RequestBody Product product not like this @RequestBody String product

Thanks@Regards,
Manoj