小编Den*_* K.的帖子

我已经通过Spring文档和源代码,仍然没有找到我的问题的答案.

我在我的域模型中有这些类,并希望在spring-mvc中将它们用作后备表单对象.

public abstract class Credentials {
  private Long     id;
  ....
}
public class UserPasswordCredentials extends Credentials {
  private String            username;
  private String            password;
  ....
}
public class UserAccount {
  private Long              id;
  private String            name;
  private Credentials       credentials;
  ....
}

我的控制器:

@Controller
public class UserAccountController
{
  @RequestMapping(value = "/saveAccount", method = RequestMethod.POST)
  public @ResponseBody Long saveAccount(@Valid UserAccount account)
  {
    //persist in DB
    return account.id;
  }

  @RequestMapping(value = "/listAccounts", method = RequestMethod.GET)
  public String listAccounts()
  {
    //get all accounts from …