Cookie对象的创建以及数据的获取

1.java代码如下：

package com.ask.cookie;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.LinkedList;

import java.util.List;

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 CookieAdd extends HttpServlet{

@Override

protected void service(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

resp.setCharacterEncoding("utf-8");

resp.setContentType("text/html;charset=utf-8");

req.setCharacterEncoding("utf-8");

//创建coolie

Cookie cookie1=new Cookie("username", "tom");

Cookie cookie2=new Cookie("pwd", "123456");

//将创建的cookie写到浏览器中

resp.addCookie(cookie1);

resp.addCookie(cookie2);

//获取浏览器保存的cookie数据

Cookie[] cookies=req.getCookies();

String name="";

String pwd="";

//遍历

for (Cookie cookie : cookies) {

//分别判断cookie的名字获取值

if ("username".equals(cookie.getName())) {

name=cookie.getValue();

}

if ("pwd".equals(cookie.getName())) {

pwd=cookie.getValue();

}

}

//设置打印输出;

PrintWriter out=resp.getWriter();

out.println("username: "+name+"<br>");

out.println("pwd: "+pwd);

}

}

2.web.xml配置文件如下：

<!-- 测试CookieAdd的用户的数据的取值 -->

<servlet>

<servlet-name>CookieAdd</servlet-name>

<servlet-class>com.ask.cookie.CookieAdd</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>CookieAdd</servlet-name>

<url-pattern>/CookieAdd</url-pattern>

</servlet-mapping>