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forms - 如何将输入发送到 servlet 但不从动作发送？

问题描述

我有一个表单，用于将一些输入发布到一个站点，但我也想将它们发布到我的 servlet - 甚至可能吗？

我试图用提交按钮做一些事情，我的意思是用函数执行 onclick，但有些东西不能正常工作

            <input type="submit" value="value1" onclick="afterSubmit()"/>
...some inputs...
        </form>

            form=document.getElementById("${initParam['posturl']}";
            function afterSubmit() {
                form.action="http://localhost:8080/url/servlet";
            }
        </script>

我的小服务程序：

public class sendThis extends HttpServlet {

    public void doPost(HttpServletRequest request,
            HttpServletResponse response)   throws ServletException, IOException {

        PrintWriter out = response.getWriter();
        out.println(request.getParameter("item_name_1"));
    }
}```

So when I click on submit button and then go to localhost:8080/url/servlet, I get this error:

HTTP Status 405 – Method Not Allowed

Type Status Report
Message HTTP method GET is not supported by this URL
Description The method received in the request-line is known by the origin server but not supported by the target resource.

标签： formspostservletsaction

解决方案

将doGet方法添加到您的 servlet 并处理请求：

protected void doGet(HttpServletRequest request,
            HttpServletResponse response)   throws ServletException, IOException {
    PrintWriter out = response.getWriter();
    out.println(request.getParameter("item_name_1"));
}

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