java方法没有返回正确的类型

Question

我在一个类中有一个方法，它应该在点击“下一步”按钮后返回一个 jsp 文件。但它只是删除当前页面的数据并返回当前页面。

这是方法

@RequestMapping(value = "/addQuestion", method = RequestMethod.POST)
        public String addQuestion(Model model, @RequestParam(value="question", required = true)  String theQuestion , @RequestParam(value="questionId", required = true)  Integer questionId, @RequestParam(value="category", required = true)   String category, @RequestParam(value="correctAnswer", required = true)   String correctAnswer) throws SQLException{
                ViewController viewController = new ViewController();
                viewController.createQuestion(questionId, theQuestion, category, correctAnswer);
                model.addAttribute("question", new Question());
                return "qFour";
        }

它应该返回 qFour.jsp 但它只返回 addQuestion.jsp，这是它当前所在的页面

Answer 1

您可以从如下方法返回 ModelAndView。

@RequestMapping(value = "/addQuestion", method = RequestMethod.POST)
    public ModelAndView addQuestion(Model model, @RequestParam(value="question", required = true)  String theQuestion , @RequestParam(value="questionId", required = true)  Integer questionId, @RequestParam(value="category", required = true)   String category, @RequestParam(value="correctAnswer", required = true)   String correctAnswer) throws SQLException{
        ViewController viewController = new ViewController();
        viewController.createQuestion(questionId, theQuestion, category, correctAnswer);

        return return new ModelAndView("qFour", "question", new Question());
    }