我如何通过Ajax从Spring Controller中获取数据? [英] How can I get data from spring controller by ajax?

问题描述

我在jsp页面上有一个ajax，该页面通过URL /check调用spring控制器.

I have an ajax on a jsp page which calls a spring controller through URL /check .

$.ajax({
    type : "GET",
    url : "${pageContext.request.contextPath}/check",
    data : {
    "id" : ${articleCount}
    },
    success: function(data){
    //response from controller
    }
});

现在，控制器看起来像

@RequestMapping("/check")
public String check(@RequestParam Integer id, HttpServletRequest request,
        HttpServletResponse response, Model model) {
    boolean a = getSomeResult();
    if (a == true) {
        model.addAttribute("alreadySaved", true);
        return view;
    } else
        model.addAttribute("alreadySaved", false);

    return view;
}

我使用模型发送数据，并尝试在success: function(data)中以"${alreadySaved}"身份访问它，但显示空白.

I sent data using model and tried to access it in success: function(data) as "${alreadySaved}"but it shows blank.

我可以通过任何方式在视图页面上接收true/false数据吗?

Is there any way I can receive that true/false data on the view page?

推荐答案

您必须为Spring Ajax调用示例添加@ResponseBody批注

You have to add the @ResponseBody annotation for spring ajax calls example

@RequestMapping("/check")     
@ResponseBody
public String check(@RequestParam Integer id, HttpServletRequest request, HttpServletResponse response, Model model) {
    boolean a = getSomeResult();
    if (a == true) {
        model.addAttribute("alreadySaved", true);
        return view;
    } else {
        model.addAttribute("alreadySaved", false);
        return view;
    }
}

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