Spring 4 Restfull Service with bean - rest

Question

I am trying to create a simple Server / Client application that can send a bean as parameter instead of String but failing below is my code
Server
#Controller
public class GreetingController {
private static final String template = "Hello, %s!";
private final AtomicLong counter = new AtomicLong();
#RequestMapping(method=RequestMethod.POST,value="/returnGreet")
public #ResponseBody Greeting returnGreet(
#RequestBody(required=false) Greeting greet) {
if(greet == null)
return new Greeting(counter.incrementAndGet(),
String.format(template, greet));
else
return new Greeting(0,"Testing");
}
}
Client
RestTemplate restTemplate = new RestTemplate();
MultiValueMap<String,Greeting> greet = new LinkedMultiValueMap<String, Greeting>();
greet.add("greet", new Greeting(0,"XOXO"));
greeting = restTemplate.postForObject("http://localhost:8080/returnGreet",greet, Greeting.class,greet);
System.out.println("Content: " + greeting.getContent());
System.out.println("Id: " + greeting.getId() );
The result is always null for the object greet at the server side.
Any Idea ?

Answer 1

You're not using the RestTemplate correctly. Why are you passing a MultiValueMap as the Entity to be sent? This won't get serialized the way your Server expects.
Just use the Greeting object directly.
restTemplate.postForObject("http://localhost:8080/returnGreet", new Greeting(0, "XOXO"), Greeting.class);
Also, the last argument is not necessary, you don't have any URI variables.