Question

我在类中有一个方法，并且一旦命中“下一个”按钮，就会返回一个jsp文件。但它只是从当前页面擦除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

您可以从以下方法返回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());
    }

Answer 2

由于您没有提供配置文件内容，因此很难准确确定需要更改的内容。但我认为您的 addQuestion 方法的返回类型需要 ModelAndView 而不是 String 才能达到您的目的。试试这个return语句：

return new ModelAndView("qFour.jsp");

java方法没有返回正确的类型

2 个答案: