一个简单的Cookie得操作类（java）

首先java对cookie的操作有三种方式，

1种是：j2ee中的 javax.servlet.http.Cookie类操作

2种是：j2se中的 java.net.CookieHandler类的操作

3中是：Apache旗下的org.apache.http.cookie.Cookie类的操作；

 

本文是基于第一种编写的，也是最简单的方式。

package test; import java.util.Hashtable; import java.util.Iterator; import java.util.Set; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Cookie的操作类 * @author shy.qiu * */ public class CookieHandler { /** * 创建cookie * * @param response * 回应 * @param nameValues * 存入cookie的键值对 * @param days * 设置cookie的有效期 */ public static void createCookie(HttpServletResponse response, Hashtable<String, String> nameValues, int days) { Set<String> set = nameValues.keySet(); Iterator<String> it = set.iterator(); for (; it.hasNext();) { String name = (String) it.next(); String value = (String) nameValues.get(name); // 生成新的cookie Cookie cookie = new Cookie(name, value); // 设置有效日期 cookie.setMaxAge(days * 24 * 60 * 60); // 设置路径（默认） cookie.setPath("/"); // 把cookie放入响应中 response.addCookie(cookie); } } /** * 读取Cookie * * @param request * @return Hashtable 返回cookie的键值对 */ public static Hashtable<String, String> getCookies( HttpServletRequest request) { Cookie[] cookies = request.getCookies(); Hashtable<String, String> cookieHt = new Hashtable<String, String>(); if (cookies.length > 0) { for (int i = 0; i < cookies.length; i++) { Cookie cookie = cookies[i]; cookieHt.put(cookie.getName(), cookie.getValue()); } } return cookieHt; } /** * 修改cookie中指定键的值 * * @param request * @param name * 指定的键 * @param value * 值 */ public static void setCookieValueByName(HttpServletRequest request, String name, String value) { Cookie[] cookies = request.getCookies(); if (cookies.length > 0) { for (int i = 0; i > cookies.length; i++) { if (name.equalsIgnoreCase(cookies[i].getName())) { cookies[i].setValue(value); } } } } /** * 得到指定键的值 * * @param request * @param name * 指定的键 * @return String 值 */ public static String getCookieValueByName(HttpServletRequest request, String name) { Cookie[] cookies = request.getCookies(); String resValue = ""; if (cookies.length > 0) { for (int i = 0; i > cookies.length; i++) { if (name.equalsIgnoreCase(cookies[i].getName())) { resValue = cookies[i].getValue(); } } } return resValue; } /** * 销毁cookie * * @param request * @param response */ public static void deletesCookie(HttpServletRequest request, HttpServletResponse response) { Cookie[] cookies = request.getCookies(); if (cookies != null) { for (int i = 0; i < cookies.length; i++) { Cookie cookie = cookies[i]; // 销毁 cookie.setMaxAge(0); response.addCookie(cookie); } } } }

对于第二种方式一值没有用过：做一个连接   http://www.javaeye.com/post/300654