javaajax变量传递

我有一个java文件，我想通过它使用AJAX将类似于：{id:5，GPA:5}的映射传递到我的jsp文件。我正在为此使用以下代码：

在我的JAVA文件中：

protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
            JSONObject jsonResult = new JSONObject();
            jsonResult.put("id", "5");
            jsonResult.put("GPA", "5");

            response.setContentType("application/json");
            response.setCharacterEncoding("UTF-8");
            response.getWriter().write(jsonResult.toString());
}

在jsp文件中： --一些extJS代码--

response.responseText正在打印整个jsp文件，而不是打印id:5、GPA:5 有人能帮我吗

protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
            JSONObject jsonResult = new JSONObject();
            jsonResult.put("id", "5");
            jsonResult.put("GPA", "5");

            response.setContentType("application/json");
            response.setCharacterEncoding("UTF-8");
            response.getWriter().write(jsonResult.toString());
}

这将无法编译，您缺少return语句

---

根据

ModelAndView

返回类型判断，这似乎是一个Spring MVC控制器。我猜您返回的是一个JSP视图，而不是想要返回的JSON对象。有关如何从Spring MVC返回JSON对象的信息，请参阅。

您的函数不返回任何内容，这是正确的，因此请将其更改为void:

protected void handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
            JSONObject jsonResult = new JSONObject();
            jsonResult.put("id", "5");
            jsonResult.put("GPA", "5");

            response.setContentType("application/json");
            response.setCharacterEncoding("UTF-8");
            response.getWriter().write(jsonResult.toString());
}

---

重新标记，因为您似乎正在使用Spring MVCI。很抱歉，我添加了返回语句ModelAndView mav=new ModelAndView（“屏幕上的断言”、“AssertRules”、“A”）；返回mav；

protected void handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
            JSONObject jsonResult = new JSONObject();
            jsonResult.put("id", "5");
            jsonResult.put("GPA", "5");

            response.setContentType("application/json");
            response.setCharacterEncoding("UTF-8");
            response.getWriter().write(jsonResult.toString());
}