Spring MVC HttpServletRequest请求:点击了哪个按钮

时间:2013-04-25 02:25:57

标签: java spring spring-mvc

我有一个带有三个按钮的表单,一个用于保存,更新和查询,但是我想在服务器端知道用户点击了什么按钮。我尝试使用request.getParameter(“action”)和request.getAttribute(“action”),但它们都返回null。有没有办法在服务器上获得这个可能我可以在会话中存储“动作”值?如果是这样,我如何创建和存储会话变量?

代码

<button class="btn" value="save"  id="action"></button>

<button class="btn" value="update"  id="action"></button>

<button class="btn" value="query"  id="action"></button>

基本上我试图避免重新发布到服务器。我知道我想使用POST / redirect / GET模式但是我的方法不支持重定向,即使更改了,表单也有错误,我将无法返回服务器验证。

控制器

@RequestMapping(value = "crime_registration_save.htm", method = RequestMethod.POST)
    public ModelAndView handleSave(@Valid @ModelAttribute Crime crime,HttpServletRequest request,
            HttpServletResponse response,BindingResult result, ModelMap m, Model model) throws Exception {


        String action = request.getParameter("action");

    logger.info("The requested action is "+ action);
        if (result.hasErrors()) {

            logger.debug("Has Errors In crime_registration_save");
            model.addAttribute("dbcriminals", myCriminalList);
            model.addAttribute("dbvictims", myVictimList);
            model.addAttribute("status", myStatusList);
            model.addAttribute("crimeCategory", myCrimeCategoryList);
            model.addAttribute("crimeLevel", myCrimeLevelList);
            model.addAttribute("officers", myOfficerList);

            model.addAttribute("victimList", crime.getVictims());
            model.addAttribute("criminalList", crime.getCriminals());

            model.addAttribute("crimeTypeList",
                    crimeTypeManager.getCrimeTypeList(crime.getOffenceCatId()));
            model.addAttribute("icon", "ui-icon ui-icon-circle-close");
            model.addAttribute("results", "Error: Unable to Save Record!");

            return new ModelAndView("crime_registration");
        }
        logger.debug("No errors going to preform save");

        int crimeRecNo;

        crimeRecNo = crimeManager.saveCrime(crime);

        model.addAttribute("dbcriminals", myCriminalList);
        model.addAttribute("dbvictims", myVictimList);
        model.addAttribute("status", myStatusList);
        model.addAttribute("crimeCategory", myCrimeCategoryList);
        model.addAttribute("crimeLevel", myCrimeLevelList);
        model.addAttribute("officers", myOfficerList);
        model.addAttribute("save", "disabled");
        model.addAttribute("victimList", crime.getVictims());
        model.addAttribute("criminalList", crime.getCriminals());

        model.addAttribute("crimeTypeList",
                crimeTypeManager.getCrimeTypeList(crime.getOffenceCatId()));
        model.addAttribute("crimeRecNo", crimeRecNo);
        model.addAttribute("crimeRecordNoStatus", "true");
        model.addAttribute("icon", "ui-icon ui-icon-circle-check");
        model.addAttribute("results", "Record Was Saved");



        return new ModelAndView("crime_registration");
    }

jquery的

function submitPage(urlMapping,method,action) {
        alert(urlMapping);
        document.getElementById("crime_registration").action = urlMapping;
        document.getElementById("crime_registration").target = "_self";
        document.getElementById("crime_registration").method = method;
        document.getElementById("crime_registration").submit();
        $('#action').val(action);

        alert($('#action').val());
        return false;
    }

3 个答案:

答案 0 :(得分:2)

表格不是请求属性,而是参数。

使用提交,为其命名,并按该名称检索参数。

<input type="submit" class="btn" value="save" name="action" />

String button = request.getParameter("action");

如果表单中的不是,您需要一些JavaScript,但您的问题暗示它是。

答案 1 :(得分:1)

这里的解决方案是有一个名为action的隐藏变量,点击该按钮,您可以使用单击按钮的值更新隐藏变量,然后提交表单。

例如:

<form action="" method="post" name="myform">
    <input type="hidden" name="action" />

    ....

    <button class="btn" value="save"  id="action" onclick="submitForm(this)"></button>
    <button class="btn" value="update"  id="action" onclick="submitForm(this)"></button>
    <button class="btn" value="query"  id="action" onclick="submitForm(this)"></button>
</form>

然后

<script>

    function submitForm(btn){
        var frm = document.myform;

        frm.action.value = btn.value;
        frm.submit();
        return false;

    }

</script>

答案 2 :(得分:1)

您需要添加到按钮的所有内容是属性type =“submit”和属性name =“parametername”。然后按钮标签就像提交类型的输入一样,其优点是值可以与显示文本或按钮标签内的任何内容不同。

如果你想用ajax提交你的表单我现在会使用jquery ajaxform插件来处理这个问题。