Spring 4 Restfull服务用豆(Spring 4 Restfull Service with bean)

 我正在尝试创建一个简单的服务器/客户端应用程序，可以将bean作为参数而不是String发送，但是下面的失败是我的代码 
 
 服务器 
 
@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");
}
}
 
 客户 
 
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() );
 
 对于服务器端的对象问候，结果始终为null。 
 
 任何想法 ？ 

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 ?

原文：https://stackoverflow.com/questions/21287186