默認的JSON到對象映射不起作用

Question

我想執行POST的JSON消息並想要轉換爲Employee Object。 JSON消息是{"employee":{"id":2231,"name":"jeffarry2231","niNumber":"SN10KTL"}} 。

Employee對象

public class Employee { 
    private Long id; 
    private String name; 
    private String niNumber; 
    ... 
} 

的EmployeeController

@Controller 
public class EmployeeController { 

    @RequestMapping(value = "/employee/add/", method = RequestMethod.POST) 
    public void addEmployee(Employee employee){ 
     System.out.println(employee.getName()); 
    } 
} 

的RestTemplate被過帳請求

@Test 
public void postMethod() { 
    RestTemplate restTemplate = new RestTemplate(); 
    String jsonEmployee = "{'id':2231,'name':'jeffarry2231','niNumber':'SN10KTL'}}"; 

    HttpHeaders headers = new HttpHeaders(); 
    headers.setAccept(newArrayList(MediaType.APPLICATION_JSON)); 
    HttpEntity<String> requestEntity = new HttpEntity<String>(jsonEmployee, headers); 
    restTemplate.exchange("http://localhost:8080/employee/add/", POST, requestEntity, String.class); 
} 

applicationContext.xml文件具有

<mvc:annotation-driven/> 

我期待MappingJacksonHttpMessageConverter默認使用，但它似乎沒有轉換，不知道我在這裏錯過了什麼！

Answer 1

嘗試添加@RequestBody註釋：

@RequestMapping(value = "/employee/add/", method = RequestMethod.POST) 
public void addEmployee(@RequestBody Employee employee){ 
    System.out.println(employee.getName()); 
}