用Servlet获取表单数据
用Servlet获取表单数据
在webroot下新建userRegist2.jsp
代码如下：
<%@ 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="/javaweb/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="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="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>
可运行查看下结果：
然后新建一个servlet，AcceptUserRegist.java，代码如下：
package yqq.request.study; 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>"); } }
一定要记得配置好web.xml，下面是我的，
<servlet-name>AcceptUserRegist</servlet-name>
<servlet-class>yqq.request.study.AcceptUserRegist</servlet-class>
<servlet-mapping>
<servlet-name>AcceptUserRegist</servlet-name>
<url-pattern>/AcceptUserRegist</url-pattern>
</servlet-mapping>
输入相关内容，可以得到以下结果：
邮箱数据出问题了，先记下这个问题了。
《 Java_Web轻量级开发全体验》
