小编jch*_*ont的帖子

我有一个具有枚举属性的域对象,我想显示一个下拉列表,其中包含该对象表单中所有可能的枚举值.想象一下以下对象:

public class Ticket {

  private Long id;

  private String title;

  private State state;

  // Getters & setters

  public static enum State {
    OPEN, IN_WORK, FINISHED
  }

}

在我的控制器中,我有一个方法,为这个对象呈现一个表单:

@RequestMapping("/tickets/new")
public String showNewTicketForm(@ModelAttribute Ticket ticket) {
  return "tickets/new";
}

模板看起来像这样:

<form th:action="@{/tickets}" method="post" th:object="${ticket}">
  <input type="text" th:field="*{title}" />
  <select></select>
</form>

以后它应该转换成这样的东西:

<form action="/tickets" method="post">
  <input type="text" name="title" />
  <select name="state">
    <option>OPEN</option>
    <option>IN_WORK</option>
    <option>FINISHED</option>
  </select>
</form>

如何创建选择标签？所选值也应自动映射到票证,以便我可以在控制器中执行以下操作:

@RequestMapping(value = "/tickets", method = RequestMethod.POST)
public String createTicket(@Valid Ticket ticket) {
  service.createTicket(ticket);

  return …