Method catcher

ch2/ExceptionController.java:20–28

(Exception ex, Model m)

	}

	@ExceptionHandler(Exception.class)
	@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR) // 200 -> 500
	public String catcher(Exception ex, Model m) {
		System.out.println("catcher() in ExceptionController");
		System.out.println("m="+m);
//		m.addAttribute("ex", ex);

		return "error";
	}
	
	@RequestMapping("/ex")
	public String main(Model m) throws Exception {