jsp4 Cookie

Screenshot_2016-05-04-11-11-52-576.png
(1)Screenshot_2016-05-04-11-12-53-120.png
（2）Session----Coolie
(3)
Screenshot_2016-05-04-11-15-08-930.png

Screenshot_2016-05-04-11-16-16-891.png
(4)Screenshot_2016-05-04-11-16-43-735.pngScreenshot_2016-05-04-11-17-38-989.png

cookie保存
index.jsp
  1. <%@ page language="java" import="java.util.*,java.net.*"  contentType="text/html; charset=UTF-8"%>
  2. <%
  3. String path = request.getContextPath();
  4. String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
  5. %>
  7. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
  8. <html>
  9.   <head>
  10.     <base href="<%=basePath%>">
  11.     
  12.     <title>My JSP 'index.jsp' starting page</title>
  13. 	<meta http-equiv="pragma" content="no-cache">
  14. 	<meta http-equiv="cache-control" content="no-cache">
  15. 	<meta http-equiv="expires" content="0">    
  16. 	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  17. 	<meta http-equiv="description" content="This is my page">
  19.   </head>
  20.   
  21.   <body>
  22.  
  23. 		<h1>用户登录</h1>
  24. 		<hr>
  25. 			<%
  26. 			 request.setCharacterEncoding("utf-8");
  27. 		String username = "";
  28. 		String password = "";
  29. 		Cookie[] cookies = request.getCookies();
  30. 		if (cookies != null && cookies.length > 0) {
  31. 			for (Cookie c : cookies) {
  32. 				if (c.getName().equals("username")) {//(名称)
  33. 					username=URLDecoder.decode(c.getValue(),"utf-8");
  34. 				}
  35. 				if( c.getName().equals("password")){
  36. 					password=URLDecoder.decode(c.getValue(),"utf-8");
  37. 				}
  38. 			}
  39. 		}
  40. 	%>
  41. 			<form action="dologin.jsp" method="post" name="loginForm">
  42. 			<table>
  43. 			  <tr><td>用户名：</td><td><input type="text" name="username" value="<%=username %>" /> </td></tr>
  44. 			   <tr><td>密码：</td><td><input	type="password" name="password" value="<%=password %>" /></td></tr>
  45. 			    <tr><td colspan="2" ><input type="checkbox" name="isUseCookie" checked="checkd" />十天内记住登陆状态</td></tr>
  46. 			    <tr><td colspan="2" aligin="center"><input type="submit" value="登录"></td></tr>
  47. 			</table>
  48. 				
  49. 			</form>
  50. 		
  51.   </body>
  52. </html>
dologin.jsp
  1. <%@ page language="java" import="java.util.*,java.net.*"  contentType="text/html; charset=UTF-8"%>
  2. <%
  3. String path = request.getContextPath();
  4. String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
  5. %>
  7. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
  8. <html>
  9.   <head>
  10.     <base href="<%=basePath%>">
  11.     
  12.     <title>My JSP 'dologin.jsp' starting page</title>
  13.     
  14. 	<meta http-equiv="pragma" content="no-cache">
  15. 	<meta http-equiv="cache-control" content="no-cache">
  16. 	<meta http-equiv="expires" content="0">    
  17. 	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  18. 	<meta http-equiv="description" content="This is my page">
  19.   </head>
  20.   
  21.   <body>
  22.     <h1>登陆成功</h1> <br><br><br><br>
  23.     <%
  24.     request.setCharacterEncoding("utf-8");//防止中文乱码
  25.        //首先判断用户是否选择了记录登陆状态
  26.        String[] isUseCookie=request.getParameterValues("isUseCookie");//返回包含参数name的所有值的数组
  27.        if(isUseCookie!=null&&isUseCookie.length>0){
  28.     	   //吧用户名和密码保存在Cookie对象里面
  29.     	   String username= URLEncoder.encode(request.getParameter("username"),"utf-8");//返回name指定函数的参数值
  30.     	   //URLEncoder.encode(s, enc)防止中文乱码。。短码
  31.     	   String password= URLEncoder.encode(request.getParameter("password"),"utf-8");  
  32.     	 
  33.     	   Cookie usernameCookie=new Cookie("username",username);//创建cookie对象
  34.     	   Cookie passwordCookie=new Cookie("password",password);
  35.     	   usernameCookie.setMaxAge(8640000);//设置最大生存期限为10天(有效期)
  36.     	   passwordCookie.setMaxAge(8640000);
  37.     	   response.addCookie(usernameCookie);//加入cookie对象
  38.     	   response.addCookie(passwordCookie);
  39.        }else{
  40.     	   Cookie[] cookies=request.getCookies();//读取cookie对象
  41.     	   if(cookies!=null&&cookies.length>0){
  42.     		   for(Cookie c:cookies){
  43.     			   if(c.getName().equals("username")||c.getName().equals("password")){//(名称)
  44.     				   c.setMaxAge(0);//设置cookie失效
  45.     			        response.addCookie(c);//重新保存
  46.     			   }
  47.     		   }
  48.     	   }
  49.        }
  50.     %>
  51.     <a href="users.jsp" target="_blank">查看用户信息</a>
  52.   </body>
  53. </html>
users.jsp
  1. <%@ page language="java" import="java.util.*,java.net.*"
  2. 	contentType="text/html; charset=UTF-8"%>
  3. <%
  4. 	String path = request.getContextPath();
  5. 	String basePath = request.getScheme() + "://"
  6. 			+ request.getServerName() + ":" + request.getServerPort()
  7. 			+ path + "/";
  8. %>
  10. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
  11. <html>
  12. <head>
  13. <base href="<%=basePath%>">
  15. <title>My JSP 'users.jsp' starting page</title>
  17. <meta http-equiv="pragma" content="no-cache">
  18. <meta http-equiv="cache-control" content="no-cache">
  19. <meta http-equiv="expires" content="0">
  20. <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  21. <meta http-equiv="description" content="This is my page">
  22. </head>
  24. <body>
  25. 	<h1>用户信息</h1>
  26. 	<br>
  27. 	<br>
  28. 	<br>
  29. 	<br>
  30. 	<%
  31. 	 request.setCharacterEncoding("utf-8");
  32. 		String username = "";
  33. 		String password = "";
  34. 		Cookie[] cookies = request.getCookies();
  35. 		if (cookies != null && cookies.length > 0) {
  36. 			for (Cookie c : cookies) {
  37. 				if (c.getName().equals("username")) {//(名称)
  38. 					//解码用URLDecoder.decode(s, enc)
  39. 					username=URLDecoder.decode(c.getValue(),"utf-8");
  40. 				}
  41. 				if( c.getName().equals("password")){
  42. 					password=URLDecoder.decode(c.getValue(),"utf-8");
  43. 				}
  44. 			}
  45. 		}
  46. 	%>
  47. 	用户名：<%=username %>
  48. 	<br> 密码：<%=password %>
  49. 	<br>
  50. </body>
  51. </html>
(5)Session-Cookie





posted @ 2016-05-04 17:37  半夏来福  阅读(247)  评论(0)  编辑  收藏  举报