登录页
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>Insert title here</title> 8 </head> 9 <body> 10 <form name="form1",acion="lianxi2.jsp"> 11 12 13 用户名： 14 <input name="user" type="text" width="30"/><br> 15 16 密 码： 17 <input name="mima" type="password" width="30"/><br> 18 19 <input name="denglu" type="submit" value="登录"/> 20 21 22 </form> 23 24 </body> 25 </html>
处理页
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>Insert title here</title> 8 </head> 9 <body> 10 <% 11 12 //设置用户名为abc，密码为123 13 String s1 = new String(request.getParameter("user")); 14 15 String s2 = new String(request.getParameter("mima")); 16 17 if(s1 != "abc" || s2 != "123") 18 { 19 out.print("登录失败"); 20 } 21 22 response.sendRedirect("lianxi3.jsp"); 23 %> 24 </body> 25 </html>
错误提示页
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>Insert title here</title> 8 </head> 9 <body> 10 用户名或密码错误！ 11 <% 12 13 response.setHeader("refresh", "30;URL=lianxi1.jsp"); 14 15 %> 16 17 </body> 18 </html>