理解邮件服务器与电子邮件服务的工作原理

<div>
            <form name="" method="Get" action="MyServlet">
            <table border="1">
                <tr>
                    <td>Num1</td>
                    <td><input type="text" name="text">
                </tr>
                 <tr>
                    <td>Num2</td>
                    <td><input type="text" name="text2">
                </tr>
                <tr>
                    <td><input type="submit" value="+" name="btnSubmit">
                        <input type="submit" value="-" name="btnSubmit"></td>
                     <td>   <input type="submit" value="*" name="btnSubmit">
                        <input type="submit" value="/" name="btnSubmit"> 
                    
                    </td>
                </tr>
            </table>
            </form>

²»ÀËÂþ¤Ä ¥·ÏÈÉú©Y 2015/4/3 9:49:05
 protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        PrintWriter out=response.getWriter();
        try{
        String a=request.getParameter("text");
        int a1=Integer.parseInt(a);
         String b=request.getParameter("text2");