这可以通过自定义编辑器完成，该编辑器将JSON转换为UserProfile对象：

public class UserProfileEditor extends PropertyEditorSupport  {

    @Override
    public void setAsText(String text) throws IllegalArgumentException {
        ObjectMapper mapper = new ObjectMapper();

        UserProfile value = null;

        try {
            value = new UserProfile();
            JsonNode root = mapper.readTree(text);
            value.setEmail(root.path("email").asText());
        } catch (IOException e) {
            // handle error
        }

        setValue(value);
    }
}

这是为了在控制器类中注册编辑器：

@InitBinder
public void initBinder(WebDataBinder binder) {
    binder.registerCustomEditor(UserProfile.class, new UserProfileEditor());
}

这是使用编辑器解组JSONP参数的方法：

@RequestMapping(value = "/jsonp", method = RequestMethod.GET, produces = {MediaType.APPLICATION_JSON_VALUE})
@ResponseBody
SessionInfo register(@RequestParam("profileJson") UserProfile profileJson){
  ...
}

现在为答案。假设你有一个类似于以下内容的UserProfile pojo：

public class UserProfile {

private String email;
// etc...

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

// more getters and setters...
}

…然后，你的Spring MVC方法将JSON参数为{“ email”：“ mymail@gmail.com”}的GET参数名称“ profileJson”转换为以下代码：

import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper; // this is your lifesaver right here

//.. your controller class, blah blah blah

@RequestMapping(value="/register", method = RequestMethod.GET) 
public SessionInfo register(@RequestParam("profileJson") String profileJson) 
throws JsonMappingException, JsonParseException, IOException {

    // now simply convert your JSON string into your UserProfile POJO 
    // using Jackson's ObjectMapper.readValue() method, whose first 
    // parameter your JSON parameter as String, and the second 
    // parameter is the POJO class.

    UserProfile profile = 
            new ObjectMapper().readValue(profileJson, UserProfile.class);

        System.out.println(profile.getEmail());

        // rest of your code goes here.
}