这里面包括java操作cookie的工具类，设置cookie,删除cookie,以及得到cookie的值，你可以参考下，如果需要例子，您可以去下载，在tomcat中部署一下就可以用了！谢谢
package com.hanchao.util;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* cookie工具类
* @author hanchao
* 2013-04-23
*/
public class CookieUtil {
/*******************
* 返回用户访问的次数
* hanchao
* 2013-04-23
* *****************
* @param request
* @param cName
* @param value
* @return
*/
public static String getValue(HttpServletRequest request,String cName,String value) {
Cookie[] cookies = request.getCookies();
if(cookies != null) {
for(int i = 0; i < cookies.length; i++) {
Cookie cookie = cookies[i];
if(cName.equals(cookie.getName())) {
return cookie.getValue();
}
}
}
return value;
}
/**************************
* get Cookie By cookieName
* hanchao
* 2013-04-23
* ***********************
* @param request
* @param cName
* @return
*/
public static Cookie getCookie(HttpServletRequest request,String cName) {
Cookie[] cookies = request.getCookies();
if(cookies != null) {
for(int i = 0; i < cookies.length; i++) {
Cookie cookie = cookies[i];
if(cookie != null && cName.equals(cookie.getName())) {
return cookie;
}
}
}
return null;
}
/**
* 添加cookie
* @param response
* @param namecookie的key值
* @param valuecookie的value值
* @param pathcookie的路径
* @param domaincookie的域
* @param timeoutcookie的过期时间
* 2013-6-18
* @author： 韩超
*/
public static void addCookie(HttpServletResponse response,String name,String value,String path,String domain,int timeout) {
Cookie cookie = new Cookie(name, value);
if(domain == null) {
domain = ".baidu.com";//Constant.PASSPORTDOMAIN;
}
if(path == null) {
path = "/";
}
cookie.setDomain(domain);
cookie.setPath(path);
cookie.setMaxAge(timeout);
response.addCookie(cookie);
}
/**
* 删除cookie
* @param request
* @param response
* @param namecookie的名称
* 2013-6-18
* @author： 韩立伟
*/
public static void delCookie(HttpServletRequest request,HttpServletResponse response,String name) {
Cookie[] cookies = request.getCookies();
for(Cookie cookie : cookies) {
if(cookies != null && (name).equals(cookie.getName())) {
addCookie(response,name,null,null,null,0);
return;
}
}
}
/**
* 修改cookie的value值
* @param request
* @param response
* @param name
* @param value
* 2013-6-18
* @author： 韩超
*/
public static void updateCookie(HttpServletRequest request,HttpServletResponse response,String name,String value) {
Cookie[] cookies = request.getCookies();
for(Cookie cookie : cookies) {
if(cookies != null && (name).equals(cookie.getName())) {
addCookie(response,name,value,cookie.getPath(),cookie.getDomain(),cookie.getMaxAge());
return;
}
}
}
}