Question

在我的Spring应用程序中，我在User和Area之间有一个ManyToMany关系，用户可以将Area保存到Area对象的ArrayList。用户可以查看他们的个人资料，并在jsp页面上以表格的形式查看他们保存的区域。我在表格中有一个标题值用于区域名称，下面的行将显示区域对象的用户ArrayList中的每个区域，用于查看Google Map上的区域的链接以及用于从其ArrayList中删除区域的按钮。

        // Loop to go through the ArrayList of Areas
        <c:forEach var="o" items="${savedAreas}">
        <tr>
            // Display the name of the area
            <td width="10%" height="50"><c:out value="${o.areaName}" /></td>

            // View area on the map
            <a href = "welcome"> View on the map</a></td>

            // Button to pass the particular area object to the "deletearea" 
            // method in the Controller in the Spring application to run the 
            // delete method and remove the area object from the ArrayList
            <td width="3%" height="50"  class="tg-yw4l">      
                 <form th:action="@{/deletearea}" method="post" th:object="${area}">

                <button type="submit" value="Submit" class="btn btn-danger">Delete</button>
              </form>
            </td>
         </tr>
    </c:forEach>

区域对象应该传递给Controller中的以下方法。

    @RequestMapping(value = "/deletearea", method = RequestMethod.POST)
public String deleteArea(@Valid Area area, BindingResult bindingResult, Model model) {

      // Gets the current logged in user
      Authentication loggedInUser = SecurityContextHolder.getContext().getAuthentication();
      String username = loggedInUser.getName(); // Authentication for 

      //Finds the user details in the database
      User user = userRepository.findByUsername(username);

      // Calls deleteArea from User Class and deletes area object from 
      // Arralist. Will include this method below
      user.deleteArea(area);

     // Saves update to user
      userRepository.save(user);


      //Simple print debug
      System.out.println(user + " deleted : " + area);

      // Refresh the jsp page
      return "savedAreas";
}

在Controller中的方法中调用deleteArea。它来自User Object类。

    public void deleteArea(Area area) {
    if (!savedAreas.isEmpty()){
        savedAreas.remove(area);
    }
}

问题是当我按下删除按钮时出现以下错误。

There was an unexpected error (type=Method Not Allowed, status=405).
Request method 'POST' not supported

对于我如何解决这个问题，有人会有任何建议吗？干杯

请求方法＆＃39; POST＆＃39;从ManyToMany关系中删除对象时不支持？

0 个答案: