JSP简单练习-用Servlet获取表单数据

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// javaBean代码package servlet;import java.io.*;import javax.servlet.*;import javax.servlet.http.*;public class AcceptUserRegist 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mimeresponse.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("E-mail")+"<br>");out.println("家庭住址是:"+codeToString(request.getParameter("address"))+"<br>");out.print("</body> </html>");}}

<!-- servletform.jsp --><%@ 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E-mail地址!");            form1.email.focus();            return false;         }      }      else      {         alert("请输入E-mail!");         form1.email.focus();         return false;      }   }</script><html><head><title>新用户注册</title></head><body><form method="POST" action="acceptUserRegist" name="form1" onsubmit="return on_submit()">新用户注册<br>用户名(*):<input type="text" name="username" size="20"><br>密 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="7">7</option>              <option value="8">8</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="E-mail" 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>

另外，在web.xml文件的<web-app>与</web-app>中加入如下配置：

  <servlet>     <servlet-name>acceptUserRegist</servlet-name>     <servlet-class>servlet.AcceptUserRegist</servlet-class>  </servlet>  <servlet-mapping>     <servlet-name>acceptUserRegist</servlet-name>     <url-pattern>/acceptUserRegist</url-pattern>  </servlet-mapping>

输入网址：localhost:8080/jspdemo/servletform.jsp

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