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》