CookieUtils.java

/**
 * Copyright © 2012-2013 <a href="https://github.com/thinkgem/jeesite">JeeSite</a> All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 */
package com.fang.bbks.common.utils;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;

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

import org.apache.http.HttpResponse;

import com.fang.bbks.common.constant.ApplicationCanstant;
import com.fang.bbks.modules.sys.entity.User;

/**
 * Cookie工具类
 * @author ThinkGem
 * @version 2013-01-15
 */
public class CookieUtils {
	
	/**
	 * 设置用户信息
	 * @param response
	 * @param name
	 * @param pwd
	 * @param uid
	 */
	public static void setUser(HttpServletResponse response, String name,String pwd,String uid){
		setCookie(response, ApplicationCanstant.COOKIE_USER_NAME, name);
		setCookie(response, ApplicationCanstant.COOKIE_USER_PWD, pwd);
		setCookie(response, ApplicationCanstant.COOKIE_USER_ID, uid);
	}
	
	/**
	 * 
	 * !!!Exception!!!
	 * 跨浏览器时，会出现异常
	 * 
	 * 读取cookies用户信息
	 * @param request
	 * @return
	 */
	public static User getUser(HttpServletRequest request){
		User u = new User();
		
		String is = getCookie(request, ApplicationCanstant.COOKIE_USER_ID);
		if(is == null || "".equals(is)){
			return null;
		}
		try{
			u.setId(Long.parseLong(is));
		}catch(NumberFormatException e){
			return null;
		}
		
		u.setUsername(getCookie(request,  ApplicationCanstant.COOKIE_USER_NAME));
		u.setPassword(getCookie(request, ApplicationCanstant.COOKIE_USER_PWD));
		
		return u;
	}
	
	/**
	 * 设置 Cookie（生成时间为1天）
	 * @param name 名称
	 * @param value 值
	 */
	public static void setCookie(HttpServletResponse response, String name, String value) {
		setCookie(response, name, value, 60*60*24);
	}
	
	/**
	 * 设置 Cookie
	 * @param name 名称
	 * @param value 值
	 * @param maxAge 生存时间（单位秒）
	 * @param uri 路径
	 */
	public static void setCookie(HttpServletResponse response, String name, String value, int maxAge) {
		Cookie cookie = new Cookie(name, null);
		cookie.setMaxAge(maxAge);
		try {
			cookie.setValue(URLEncoder.encode(value, "utf-8"));
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		response.addCookie(cookie);
	}
	/**
	 * 获得指定Cookie的值
	 * @param name 名称
	 * @return 值
	 */
	public static String getCookie(HttpServletRequest request, String name) {
		return getCookie(request, null, name, false);
	}
	/**
	 * 获得指定Cookie的值，并删除。
	 * @param name 名称
	 * @return 值
	 */
	public static String getCookie(HttpServletRequest request, HttpServletResponse response, String name) {
		return getCookie(request, response, name, true);
	}
	/**
	 * 获得指定Cookie的值
	 * @param request 请求对象
	 * @param response 响应对象
	 * @param name 名字
	 * @param isRemove 是否移除
	 * @return 值
	 */
	public static String getCookie(HttpServletRequest request, HttpServletResponse response, String name, boolean isRemove) {
		String value = null;
		Cookie[] cookies = request.getCookies();
		if (cookies != null) {
			for (Cookie cookie : cookies) {
				if (cookie.getName().equals(name)) {
					try {
						value = URLDecoder.decode(cookie.getValue(), "utf-8");
					} catch (UnsupportedEncodingException e) {
						e.printStackTrace();
					}
					if (isRemove) {
						cookie.setMaxAge(0);
						response.addCookie(cookie);
					}
				}
			}
		}
		return value;
	}
}