1, 登录页面
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>登录页</title> 8 <script type="text/javascript"> 9 function check() //函数检查登录框内的内容不能为空 10 { 11 var uid = document.getElementById("userid"); //获得id=userid的document 12 if (uid.value == "") 13 { 14 alert("用户代码不能为空"); 15 return false; 16 } 17 if (uform.password.value == "") 18 { 19 alert("密码不能为空"); 20 return false; 21 } 22 return true; 23 } 24 </script> 25 </head> 26 <body> 27 <form id="uform" action="yanzheng.jsp" method="post" onSubmit="return check();" > 28 用户代码：<input id="userid" type="text" name="userid" width=30 /> 29 密码：<input id="password" type="password" name="password" width=30 /> 30 <input type="submit" value="登录" /> 31 <a href="zhuce.jsp" >注册新用户</a> 32 </form> 33 </body> 34 </html>
2, 注册页面
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>用户注册</title> 8 <script type="text/javascript"> 9 function check() //函数检查注册帐号的内容不能为空 10 { 11 var uid = document.getElementById("userid"); 12 if (uid.value == "") 13 { 14 alert("用户代码不能为空"); 15 return false; 16 } 17 if (uform.username.value == "") 18 { 19 alert("用户名称不能为空"); 20 return false; 21 } 22 if (uform.password.value == "") 23 { 24 alert("密码不能为空"); 25 return false; 26 } 27 if (uform.password.value != uform.queren.value) 28 { 29 alert("登录密码和确认密码不一致"); 30 return false; 31 } 32 return true; 33 } 34 </script> 35 </head> 36 <body> 37 <form id="uform" action="saveUser.jsp" onSubmit="return check();"> 38 用户代码：<input id="userid" type="text" name="userid" width=30 /> 39 <br><br> 40 用户名称：<input id="username" type="text" name="username" width=30 /> 41 <br><br> 42 登录密码：<input id="password" type="password" name="password" width=30 /> 43 <br><br> 44 确认密码：<input id="queren" type="password" name="queren" width=30 /> 45 <br><br> 46 <input type="submit" value="提交" /> 47 </form> 48 </body> 49 </html>
3, 保存注册的信息
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <%@page import="com.hanqi.*" %> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 8 <title>保存用户信息</title> 9 </head> 10 <body> 11 <% 12 String strUserid = request.getParameter("userid"); 13 String strUsername = request.getParameter("username"); 14 String strPW = request.getParameter("password"); //获取注册的信息 15 if (strUserid == null || strUserid.trim().length() == 0) 16 { 17 response.sendRedirect("message.jsp?msgid=1"); 18 } 19 else if (strUsername == null || strUsername.trim().length() == 0) 20 { 21 response.sendRedirect("message.jsp?msgid=5"); 22 } 23 else if (strPW == null || strPW.trim().length() == 0) 24 { 25 response.sendRedirect("message.jsp?msgid=2"); 26 } 27 else 28 { 29 //查找用户信息 30 Object obj = application.getAttribute(strUserid); 31 if (obj != null) 32 { 33 response.sendRedirect("message.jsp?msgid=7"); 34 } 35 else 36 { 37 strUsername = new String(strUsername.getBytes("ISO-8859-1"),"UTF-8"); //将获取到的值进行转码 38 String strUser = strUserid + "#" + strUsername + "#" + strPW; //将获取到的值组合成一个字符串并储存起来 44 application.setAttribute(strUserid, strUser); //设置application的属性值 45 response.sendRedirect("message.jsp?msgid=6"); 46 } 47 } 48 %> 49 </body> 50 </html>
4, 验证登陆的帐号
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>登录验证页</title> 8 </head> 9 <body> 10 <% 11 String strUserid = request.getParameter("userid"); //获取登录页面的信息并验证 12 String strPW = request.getParameter("password"); 13 if (strUserid == null || strUserid.trim().length() == 0) 14 { 15 response.sendRedirect("message.jsp?msgid=1"); 16 } 17 else if (strPW == null || strPW.trim().length() == 0) 18 { 19 response.sendRedirect("message.jsp?msgid=2"); 20 } 21 else 22 { 23 //查找用户信息, 若已经存在则输出信息 24 Object obj = application.getAttribute(strUserid); 25 if (obj != null) 26 { 27 String strUser = obj.toString(); //将获取的application的值 28 String[] user = strUser.split("#"); //将组合的字符串分割,分别赋值 29 String strUID = user[0]; 30 String strUsername = user[1]; 31 String strP = user[2]; 32 if(strPW.equals(strP)) 33 { 34 out.print("欢迎 " + strUsername + " 登录系统"); 35 //跳转到系统页面 36 session.setAttribute("login", strUsername); 37 } 38 else 39 { 40 response.sendRedirect("message.jsp?msgid=3"); 41 } 42 } 43 else 44 { 45 response.sendRedirect("message.jsp?msgid=4"); 46 } 47 } 48 %> 49 <br><br> 50 <a href="liuyan.jsp" >留言簿</a> 51 </body> 52 </html>
5, 留言簿界面
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <%@ page import="java.util.*"%> 4 <%@ page import="java.text.*" %> 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 6 <html> 7 <head> 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 9 <title>留言簿</title> 10 <% 11 String userName = ""; 12 13 //检查登录状态 14 Object o = session.getAttribute("login"); //检查在验证登陆帐号的页面的session对象,利用其特点防止跳过登录页面 15 if (o == null) 16 { 17 response.sendRedirect("message.jsp?msgid=8"); 18 } 19 else 20 { 21 userName = o.toString(); 22 } 23 String liuy = request.getParameter("liuy"); 24 if (liuy != null && !liuy.equals("")) 25 { 26 String strLiuy = new String(liuy.getBytes("ISO-8859-1"), "UTF-8"); 27 //附加时间信息 28 Date dt = new Date(); 29 //格式化时间 30 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 31 strLiuy += " " + sdf.format(dt) + " 留言人：" + userName; 32 Object obj = application.getAttribute("liuy"); 33 ArrayList<String> A; 34 if (obj == null) 35 { 36 A = new ArrayList<String>(); 37 } 38 else 39 { 40 A = (ArrayList<String>) obj; 41 } 42 A.add(strLiuy); //添加留言,存入application 43 application.setAttribute("liuy", A); 44 } 45 %> 46 </head> 47 <body> 48 <form> //<form>表单编辑留言 49 最新留言： <br> <br> 50 <% 51 int i = 1; 52 Object obj = application.getAttribute("liuy"); 53 if (obj != null) 54 { 55 ArrayList<String> A = (ArrayList<String>) obj; //将留言的内容保存为集合的形式 56 for (int m = A.size() - 1; m >= 0; m--) 57 { 58 out.print(i + ". " + A.get(m) + "<br>"); 59 i++; 60 } 61 } 62 %> 63 <br> <br> <br> 留言内容： <br> 64 <textarea rows="10" cols="30" name="liuy"></textarea> 65 <br> <input type=submit value="提交"> 66 </form> 67 </body> 68 </html>
6, 各种错误信息
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <%@ page import="java.util.*" %> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 8 <title>消息页面</title> 9 </head> 10 <body> 11 <% 12 String strMsgID = request.getParameter("msgid"); 13 if (strMsgID == null || strMsgID.trim().length() == 0) 14 { 15 out.print("请正确传递信息"); 16 } 17 else 18 { 19 int iMsgid = Integer.parseInt(strMsgID); 20 switch (iMsgid) 21 { 22 case 1: 23 out.print("请正确输入用户代码"); 24 break; 25 case 2: 26 out.print("请正确输入密码"); 27 break; 28 case 3: 29 out.print("密码输入错误"); 30 break; 31 case 4: 32 out.print("该用户不存在"); 33 break; 34 case 5: 35 out.print("请正确输入用户名称"); 36 break; 37 case 6: 38 out.print("提交成功"); 39 break; 40 case 7: 41 out.print("用户代码已存在"); 42 break; 43 case 8: 44 out.print("请登录系统"); 45 break; 46 default: 47 out.print("传递的msgid错误"); 48 break; 49 } 50 } 51 response.setHeader("refresh", "3;URL=Login.jsp"); 52 %> 53 </body> 54 </html>
