我在这个问题上花了很多时间，但无法解决。请帮忙！当我从JSP提交表单时，出现此错误。
我的代码：
<form action="/albums/add" method="post">
<%--<div><input type="file"></div>--%>
<div>Name: <input type="text" name="name" placeholder="Name"></div>
<div>Year: <input type="text" name="year" placeholder="Release year"></div>
<div>
<select name="singer" id="singer">
<c:forEach items="${singers}" var="s">
<option value="${s.id}">${s.name}</option>
</c:forEach>
</select>
</div>
<input type="submit" >
而我的控制器代码：
@RequestMapping(value = "", method = RequestMethod.GET)
public String albumsGET(ModelMap map) {
List<Album> albums = albumDAO.getAllAlbums();
map.addAttribute("albums", albums);
return "forward:/Albums.jsp";
}
@RequestMapping(value = "/add", method = RequestMethod.GET)
public String albumsAddGET(ModelMap map) {
map.put("singers", singerDAO.getAllSingers());
return "forward:/WEB-INF/Pages/Album/AddAlbum.jsp";
}
@RequestMapping(value = "/add", method = RequestMethod.POST)
public String albumsPOST(@ModelAttribute Album album, HttpServletRequest req) {
Singer s = singerDAO.getSingerById(Long.valueOf(req.getParameter("singer")));
s.getAlbumList().add(album);
album.setSinger(s);
singerDAO.updateSinger(s);
return "redirect:/albums";
}
}
最佳答案
您可以引发spring提供的自定义异常，使用@ControllerAdvice批注创建类，并使用不同的HTTP状态代码引发自定义异常