[html]
<pre class="html" name="code">第二步：通過servlet處理</pre><pre class="html" name="code"> </pre><pre class="html" name="code"> </pre><pre class="html" name="code">import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class validateServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
//獲得用戶的信息
String username=req.getParameter("username");
String password=req.getParameter("password");
String repassword=req.getParameter("repassword");
String shuoming=req.getParameter("shuoming");//說明
String []sex=req.getParameterValues("sex");//獲得性別
String []aihao=req.getParameterValues("aihao");//獲得興趣
String []add=req.getParameterValues("add");//獲得地址
//String repassword=req.getParameter("repassword");
//String repassword=req.getParameter("repassword");
List<String> list=new ArrayList<String>();
List<String> xingqu=new ArrayList<String>();
if (null=="username"||"".equals(username))
{
list.add("there can't be a blank!");
}
if (password==null||password.length()<6||password.length()>10)
{
list.add(" the password's length must Between6 and 10 !");
}
if (repassword==null||repassword.length()<6||repassword.length()>10)
{
list.add(" the password's length must Between 6 and 10!");
}
if (password!=null&&repassword!=null&&!password.equals(repassword))
{
list.add("the two password isn't the same!");
}
if (list.isEmpty())
{
req.setAttribute("username",username);
req.setAttribute("password",password);
req.setAttribute("repassword",repassword);
req.setAttribute("shuoming",shuoming);//說明
for(int i=0;i<sex.length;i++)//性別
req.setAttribute("sex",sex[i]);
//興趣
for(int i=0;i<aihao.length;i++)
{
xingqu.add(aihao[i]);
}
req.setAttribute("aihao",xingqu+" ");
//地址
for(int i=0;i<add.length;i++)
req.setAttribute("add",add[i]);
//說明
req.getRequestDispatcher("success.jsp").forward(req,resp);
}
else
{
req.setAttribute("list",list);
req.getRequestDispatcher("unsuccess.jsp").forward(req,resp);
}
}
}
</pre><br>
最近在學習jsp先寫了個登陸界面的例子
<pre></pre>
<pre class="html" name="code">第一步：</pre><pre class="html" name="code"> </pre><pre class="html" name="code"><%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<head>
<title> 登錄界面 </title>
<%--客戶端驗證服務器端驗證未啟動 --%>
<script type="text/javascript">
function validate()
{
//判斷姓名
var username=document.getElementById("username1");
if (username.value.length==0)
{
alert("用戶名不能為空！");
return false;
}
//判斷密碼
var password=document.getElementById("password1");
var repassword=document.getElementById("repassword1");
if (password.value.length<6||password.value.length>10)
{
alert("密碼長度不能少於六位超過10位！");
return false;
}
if (repassword.value.length<6||repassword.value.length>10)
{
alert("密碼長度不能少於六位超過10位！");
return false;
}
if (password.value != repassword.value)
{
alert("兩次密碼不相同！");
return false;
}
//判斷性別
var f=document.getElementById("f");
var m=document.getElementById("m");
if (!f.checked&&!m.checked)
{
alert("性別沒選擇！");
return false;
}
//判斷興趣選項
var aihao=document.getElementsByName("aihao");
var m=0;
for ( var i=0;i<aihao.length;i++)
{
if (aihao[i].checked)
{
m++;
}
}
if (m<2)
{
alert("興趣必須多於兩個！");
return false;
}
//判斷說明是否為空
var txtValue=document.getElementById("txtTest").value;
if (txtValue.length<10)
{
alert("說明長度不能少於十個字母！");
return false;
}
return true;
}
</script>
</head>
<body>
<form onsubmit="return validate();" action="validateServlet" >
<%//服務器端驗證：<form action="validateServlet" > %>
<table>
<tr>
<td >用戶登錄：</td>
</tr>
<tr>
<td ></td>
</tr>
<tr>
<td>用戶名：</td>
<td><input type="text" name="username" id="username1"></td>
</tr>
<tr>
<td>密 碼：</td>
<td><input type="password" name="password" id="password1"></td>
</tr>
<tr>
<td>重新輸入密碼：</td>
<td><input type="password" name="repassword" id="repassword1"></td>
</tr>
<tr>
<td>性 別：</td>
<td>男：<input type="radio" name="sex" value="female" id="f" ></td>
<td>女：<input type="radio" name="sex" id="male"></td>
</tr>
<tr>
<td>興 趣：</td>
<td>籃球：<input type="checkbox" name="aihao" value="basketball"></td>
<td>足球：<input type="checkbox"" name="aihao" value="football" ></td>
<td>聽歌：<input type="checkbox"" name="aihao" value="music"></td>
<td>書法：<input type="checkbox"" name="aihao" value="writing"></td>
</tr>
<tr>
<td>地 址：</td>
<td><select name="add" size="1">
<option value="shanghai" selected>上海
<option value="yantai" >煙台
<option value="beijing" >北京
</select></td>
</tr>
<tr>
<td>說 明：</td>
<td><textarea name="shuoming" clos="20" rows="5" id="txtTest"></textarea></td>
</tr>
<tr>
<td><input type="submit" value="提交" ></td>
<td><input type="reset" value="重置"></td>
</tr>
</table>
</form>
<a href="http://www.baidu.com">百度</a>
</body>
</html></pre><pre class="html" name="code"> </pre><pre class="html" name="code">登陸成功頁面：</pre><pre class="html" name="code"><pre class="html" name="code"><%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<head>
<title>成功登陸頁面</title>
</head>
<body>
<%= "個人信息："+"<br>" +"<br>"+"<br>"%>
<%= "姓名: "+request.getAttribute("username")+"<br>" %>
<%= "密碼: "+request.getAttribute("password")+"<br>" %>
<%= "性別: "+request.getAttribute("sex")+"<br>" %>
<%= "興趣: "+request.getAttribute("aihao")+"<br>" %>
<%= "地址: "+request.getAttribute("add") +"<br>"%>
<%= "說明 : "+request.getAttribute("shuoming")+"<br>" %>
</body>
</html>
</pre><br>
<pre></pre>
<pre class="html" name="code"> </pre><pre class="html" name="code"> </pre><pre class="html" name="code"> </pre><br>
</pre>
作者：superlele123
