登陆界面(jsp)客户端验证
第二步：通过servlet处理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 {//获得用户的信息String username=req.getParameter("username");String password=req.getParameter("password");String repassword=req.getParameter("repassword");String shuoming=req.getParameter("shuoming");//说明String []sex=req.getParameterValues("sex");//获得性别String []aihao=req.getParameterValues("aihao");//获得兴趣String []add=req.getParameterValues("add");//获得地址//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);//说明for(int i=0;i<sex.length;i++)//性别req.setAttribute("sex",sex[i]);//兴趣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]);//说明req.getRequestDispatcher("success.jsp").forward(req,resp);}else{req.setAttribute("list",list);req.getRequestDispatcher("unsuccess.jsp").forward(req,resp);}}}
最近在学习jsp先写了个登陆界面的例子第一步：<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><html><head><title> 登录界面 </title><%--客户端验证服务器端验证未启动 --%><script type="text/javascript"> function validate() { //判断姓名 var username=document.getElementById("username1"); if (username.value.length==0) { alert("用户名不能为空！"); return false; } //判断密码 var password=document.getElementById("password1"); var repassword=document.getElementById("repassword1"); if (password.value.length<6||password.value.length>10) { alert("密码长度不能少于六位超过10位！"); return false; } if (repassword.value.length<6||repassword.value.length>10) { alert("密码长度不能少于六位超过10位！"); return false; } if (password.value != repassword.value) { alert("两次密码不相同！"); return false; } //判断性别 var f=document.getElementById("f"); var m=document.getElementById("m"); if (!f.checked&&!m.checked) { alert("性别没选择！"); return false; } //判断兴趣选项 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("兴趣必须多于两个！"); return false; } //判断说明是否为空 var txtValue=document.getElementById("txtTest").value; if (txtValue.length<10) { alert("说明长度不能少于十个字母！"); return false; } return true; } </script></head><body> <form onsubmit="return validate();" action="validateServlet" ><%//服务器端验证：<form action="validateServlet" > %><table><tr><td >用户登录：</td></tr><tr><td ></td></tr><tr><td>用户名：</td><td><input type="text" name="username" id="username1"></td></tr><tr><td>密 码：</td><td><input type="password" name="password" id="password1"></td></tr><tr><td>重新输入密码：</td><td><input type="password" name="repassword" id="repassword1"></td></tr><tr><td>性 别：</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>兴 趣：</td><td>篮球：<input type="checkbox" name="aihao" value="basketball"></td><td>足球：<input type="checkbox"" name="aihao" value="football" ></td><td>听歌：<input type="checkbox"" name="aihao" value="music"></td><td>书法：<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" >烟台<option value="beijing" >北京</select></td></tr><tr><td>说 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>登陆成功页面：<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><html> <head> <title>成功登陆页面</title> </head> <body> <%= "个人信息："+"<br>" +"<br>"+"<br>"%> <%= "姓名: "+request.getAttribute("username")+"<br>" %> <%= "密码: "+request.getAttribute("password")+"<br>" %> <%= "性别: "+request.getAttribute("sex")+"<br>" %> <%= "兴趣: "+request.getAttribute("aihao")+"<br>" %> <%= "地址: "+request.getAttribute("add") +"<br>"%> <%= "说明 : "+request.getAttribute("shuoming")+"<br>" %> </body></html>