浏览器cookie的学习与测试

生成cookie:

package web;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLEncoder;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SaveCookie extends HttpServlet {

	public void service(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String name = "李四";
		String name1 = URLEncoder.encode(name, "utf-8");
		Cookie c1 = new Cookie("username", name1);
		Cookie c2 = new Cookie("password", "test");
       c2.setMaxAge(10);//设置cookie当中密码的存活时间为：10秒
		response.addCookie(c1);
		response.addCookie(c2);
		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();
		out.print("<h1>add cookie success</h1>");
		out.println("<a href='Get'>查询</a>");
		out.flush();
		out.close();
	}
}

获取cookie：

package web;

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

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class GetCookie extends HttpServlet {

	public void service(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();

		Cookie[] cookies = request.getCookies();
		if (cookies != null) {
			for (int i = 0; i < cookies.length; i++) {
				Cookie c = cookies[i];
				String name = c.getName();
				String value = c.getValue();
				if (name.equals("username")) {
					value = URLDecoder.decode(value, "utf-8");
				}
				out.println(name + ":" + value + "<br/>");
			}
		}
	}
}