在使用带有json的jquery ajax的Spring MVC中，出现错误：“不支持的媒体类型”

Question

I am creating Spring MVC application, in JSP I need to send object to controller and then return the object to jsp. But I am getting "Unsupported media type" error. Could someone help me ? below is my code:

** In Controller :

@RequestMapping(value = "/addPerson", method = RequestMethod.POST,
                headers = {"Content-type=application/json" })
@ResponseBody
public Person addPerson(@RequestBody Person person) {
     System.out.println(person.getName());
     return person;
}

**In JSP :

  $.ajax({
          type: "POST",
          url: "addPerson.view",
          data: JSON.stringify({ name: "Adam", age: 30, city: "Paris" }),
          contentType: 'application/json',
          success: function(data) {
            alert(data.name + " has been added");

          },
            error : function(xhr, errorType, exception) {
                var errorMessage = exception || xhr.statusText; 
                alert("error : " + errorMessage);
            }
        });

Answer 1

Try this:

@RequestMapping(value = "/addPerson", method = RequestMethod.POST, consumes= {"application/json"})

Answer 2

For Spring to deserialize JSON from the request body and provide the generated object to a @RequestBody annotated parameter, you need to have Jackson (1 or 2) on the classpath. If Spring detects Jackson, it will register a MappingJackson2HttpMessageConverter which will do the conversion. This HttpMessageConverter can handle application/json content. No other default HttpMessageConverter can, which is why you get an Unsupported media type error.

Answer 3

contentType：“应用程序/ json； charset = UTF-8”