zoukankan      html  css  js  c++  java
  • Servlet基础下

    生成后的web.xml文件中要注册servlet的配置

    代码如下

    配置完毕后打开网页

    提交

    这里就会跳转至servlet页面

    其余jsp代码和servlet代码如下

    jsp代码

    <%@ page contentType="text/html;charset=gb2312"%>
    <script language="javascript">
    function on_submit()
    {//验证数据的合法性
    if (form1.username.value == "")
    {
    alert("用户名不能为空,请输入用户名!");
    form1.username.focus();
    return false;
    }
    if (form1.userpassword.value == "")
    {
    alert("用户密码不能为空,请输入密码!");
    form1.userpassword.focus();
    return false;
    }
    if (form1.reuserpassword.value == "")
    {
    alert("用户确认密码不能为空,请输入密码!");
    form1.reuserpassword.focus();
    return false;
    }
    if (form1.userpassword.value != form1.reuserpassword.value)
    {
    alert("密码与确认密码不同");
    form1.userpassword.focus();
    return false;
    }
    if (form1.email.value.length!= 0)
    {
    for (i=0; i<form1.email.value.length; i++)
    if (form1.email.value.charAt(i)=="@")
    break;
    if (i==form1.email.value.length)
    {
    alert("非法EMail地址!");
    form1.email.focus();
    return false;
    }
    }
    else
    {
    alert("请输入Email!");
    form1.email.focus();
    return false;

    }
    }
    </script>
    <html>
    <head>
    <title>新用户注册</title>
    </head>
    <body>
    <form method="POST" action="servlet/accept" name="form1" onsubmit="return on_submit()">
    新用户注册<br>
    用户名(*):<input type="text" name="username" size="20"><br>
    密&nbsp; 码(*):<input type="password" name="userpassword" size="20"><br>
    再输一次密码(*):<input type="password" name="reuserpassword" size="20"><br>
    性别:<input type="radio" value="男" checked name="sex">男<input type="radio" name="sex" value="女">女<br>
    出生年月:<input name="year" size="4" maxlength=4>年
    <select name="month">
    <option value="1" selected>1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
    <option value="5">5</option>
    <option value="6">6</option>
    <option value="8">7</option>
    <option value="9">9</option>
    <option value="10">10</option>
    <option value="11">11</option>
    <option value="12">12</option>
    </select>月
    <input name="day" size="3" maxlength=4>日<br>
    电子邮箱(*):<input name="email" maxlength=28><br>
    家庭住址:<input type="text" name="address" size="20"><br>
    <input type="submit" value="提交" name="B1"><input type="reset" value="全部重写" name="B2"><br>
    </form>
    </body>
    </html>

     servlet代码

    package servlet;

    import java.io.*;
    import javax.servlet.*;
    import javax.servlet.http.*;
    public class accept extends HttpServlet
    {
    public String codeToString(String str)
    {//处理中文字符串的函数
    String s=str;
    try
    {
    byte tempB[]=s.getBytes("ISO-8859-1");
    s=new String(tempB);
    return s;
    }
    catch(Exception e)
    {
    return s;
    }
    }
    public void init(ServletConfig config) throws ServletException
    {
    super.init(config);
    }
    public void doPost(HttpServletRequest request,HttpServletResponse response)
    throws ServletException,IOException
    {
    //设置mime
    response.setContentType("text/html;charset=GB2312");
    PrintWriter out=response.getWriter();
    out.println("<HTML><head><title>接收新用户注册</title></head><BODY>");
    out.println("这是新用户注册所提交的数据:<br>");
    out.println("用户名是:"+codeToString(request.getParameter("username"))+"<br>");
    out.println("密码是:"+codeToString(request.getParameter("userpassword"))+"<br>");
    out.println("性别是:"+codeToString(request.getParameter("sex"))+"<br>");
    out.println("出生年月是:"+request.getParameter("year")+request.getParameter("month")+request.getParameter("day")+"<br>");
    out.println("电子邮箱是:"+request.getParameter("email")+"<br>");
    out.println("家庭住址是:"+codeToString(request.getParameter("address"))+"<br>");
    out.println("</body> </html>");
    }
    }

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  • 原文地址:https://www.cnblogs.com/liuliuyiming/p/7784892.html
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