入门：HTML表单与Java 后台交互(复选框提交)

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仅仅给出部分关键代码：

HTML form code:

<form action="JavaFormTest" method="post" name="Form">

  <p>

    清输入用户名：<input type="text" name="username"/><br />

    请输入用户密码：<input type="password" name="password" /><br />

  </p>

     请选择你的课程<br />

  <p>

     <input type="checkbox" name="checkbox" value="足球" />足球

     <input type="checkbox" name="checkbox" value="篮球" /> 篮球

     <input type="checkbox" name="checkbox" value="乒乓球" />乒乓球

     <input type="checkbox" name="checkbox" value="排球" />排球球

   </p>

     <input type="button" name="but" onclick="submit()" value="提交" />

</form>

JavaFormTest.java 处理程序doPost 部分：

protected void doPost(HttpServletRequest request,

            HttpServletResponse response) throws ServletException, IOException {

        request.setCharacterEncoding("utf-8");

        response.setContentType("text/html;charset=utf-8");

        PrintWriter out = response.getWriter();

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

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

        String[] list = request.getParameterValues("checkbox");

        if (username.isEmpty())

            out.println("name is empty!<br />");

        else

            out.println("name:" + username + "<br />");

        if (password.isEmpty())

            out.println("password is empty!<br />");

        else

            out.println("password:" + password + "<br />");

        if (list == null)

            out.println("none list");

        else {

            out.println("list: <br />");

            for (int i=0;i<list.length;i++) {

                out.println("第 "+(i+1)+" 课程是："+ list[i]+"<br />");

            }

        }

    }