cookie

--servlet类

package serverlet;

import java.io.IOException;
import java.net.URLDecoder;

import javax.servlet.ServletException;
import javax.servlet.http.*;

@SuppressWarnings("serial")
public class HelloWorldServlet extends HttpServlet {

	@Override
	protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException 
	{
		request.setCharacterEncoding("UTF-8");
		String name =URLDecoder.decode(request.getParameter("name"),"UTF-8");;
		String password = request.getParameter("password");	
		Cookie cookie = new Cookie(name,password);
		cookie.setMaxAge(60*60); 
		response.addCookie(cookie);
		response.sendRedirect("index.jsp");
	}
}

--jsp页面代码

<%@ page language="java" pageEncoding="UTF-8"%>
<%@ page import="java.net.URLDecoder"%>

<%
	String name = null;
	String password = null;
	Cookie[] cookies = request.getCookies();
	if (cookies != null) {
		int i = cookies.length - 2;		
		name = cookies[i].getName();
		password = URLDecoder.decode(cookies[i].getValue(),"utf-8");
	} 
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<title>测试cookie</title>
	</head>
	<body>
		<form action="HelloWorldServlet" name="myForm" method="get">
			<%
				if(null == name || "" == name || name.isEmpty()){			
			 %>
				姓名:<input id="name" name="name" type="text" />	<br />
				密码:<input id="password" name="password" type="password" />	<br />
			<%
				}else{		
			%>
				姓名:<input id="name" name="name" type="text" value="<%=name %>"/> <br />
				密码:<input id="password" name="password" type="password" value="<%=password %>"/> <br />
			<%}%>			
			<br />
			<input value="提交" type="submit">
		</form>
	</body>
</html>

三、连接地址

http://liujianeye.iteye.com/blog/1157455

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