java - Spring MVC : correct exception handling

Question

我想知道如何将异常处理方法绑定(bind)到url映射方法:

@Controller
public class UserController {

    @Autowired
    UserDao userDao;

    @RequestMapping(value = "/user", method = RequestMethod.GET)
    public String users(@ModelAttribute("model") ModelMap model) {
        model.addAttribute("userList", userDao.getAll());
        String[] b = new String[0];
        String a = b[1];
        return "user";
    }

    @ExceptionHandler(Exception.class)
    public String handleAllException(Exception ex, @ModelAttribute("model") ModelMap model) {
        model.addAttribute("error", "Exception happened");
        return "error_screen";
    }
}

我故意在users方法中引发java.lang.ArrayIndexOutOfBoundsException。但我看到 handleAllException 方法没有执行。

问题:为了让异常处理正常工作，我忘记做什么？

Answer 1

尝试做这样的事情:

 @ExceptionHandler(Exception.class)
 public ModelAndView handleAllException(Exception ex) {
  ModelAndView model = new ModelAndView("error_screen");
  model.addAttribute("error", "Exception happened");
  return model;
 }