会话跟踪技术之——cookie
Posted 初夏的一棵歪脖子树
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了会话跟踪技术之——cookie相关的知识，希望对你有一定的参考价值。
1.cookieForm
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 action="setCookie.jsp" method="post"> 11 网名：<input type="text" name="webName"/><br/> 12 网址：<input type="url" name="url"/><br/> 13 <button type="submit">提交</button> 14 </form> 15 </body> 16 </html>
2.setCookie
1 <%@page import="java.net.URLEncoder"%> 2 <%@ page language="java" contentType="text/html; charset=UTF-8" 3 pageEncoding="UTF-8"%> 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>Insert title here</title> 9 </head> 10 <body> 11 <% 12 //获取从表单提交过来的数据，作为cookie的对象 13 String webName=request.getParameter("webName"); 14 String url=request.getParameter("url"); 15 //解决表单传到另一个页面乱码问题 16 webName=new String(webName.getBytes("ISO-8859-1"),"utf-8"); 17 18 //分别创建两个cookie对象 19 Cookie cookie1=new Cookie("name",URLEncoder.encode(request.getParameter("webName"),"utf-8")); 20 Cookie cookie2=new Cookie("url",url); 21 22 //分别设置Cookie的有限期 23 cookie1.setMaxAge(3*3600);//设置3小时 24 cookie2.setMaxAge(300); 25 26 //在响应头部添加Cookie 27 response.addCookie(cookie1); 28 response.addCookie(cookie2); 29 %> 30 </body> 31 </html>
3.getCookie
1 <%@page import="java.net.URLDecoder"%> 2 <%@ page language="java" contentType="text/html; charset=UTF-8" 3 pageEncoding="UTF-8"%> 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>Insert title here</title> 9 </head> 10 <body> 11 <% 12 Cookie[] cookie=request.getCookies(); 13 if(cookie.length>0) 14 { 15 for(int i=0;i<cookie.length;i++) 16 { 17 String name=cookie[i].getName(); 18 String value=cookie[i].getValue(); 19 /* //查找某个cookie来删除 20 if(name.equalsIgnoreCase("name")) 21 { 22 cookie[i].setMaxAge(0); 23 response.addCookie(cookie[i]); 24 } */ 25 //如果value的值出现乱码，则要进行解码 26 value=URLDecoder.decode(value, "utf-8"); 27 out.print(name+"<br/>"); 28 out.print(value); 29 30 } 31 32 } 33 34 %> 35 </body> 36 </html>
以上是关于会话跟踪技术之——cookie的主要内容，如果未能解决你的问题，请参考以下文章