package com.matrix.core.tools;
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import java.io.UnsupportedEncodingException;
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import java.net.URLEncoder;
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import java.util.HashMap;
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import java.util.Map;
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import javax.servlet.http.Cookie;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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/**
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* 该类可以从浏览器请求中提取出cookies并进行对cookis的相关操作
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*
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* @author JIANGYOUYAO
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* @email 935090232@qq.com
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* @date 2018年1月24日
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*/
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public class CookiesUtil {
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/**
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* 根据名字获取cookie
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*
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* @param request
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* @param name
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* cookie名字
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* @return
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*/
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public static Cookie getCookieByName(HttpServletRequest request, String name) {
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Map<String, Cookie> cookieMap = readCookieMap(request);
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if (cookieMap.containsKey(name)) {
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Cookie cookie = (Cookie) cookieMap.get(name);
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return cookie;
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} else {
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return null;
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}
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}
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/**
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* 将cookie封装到Map里面
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*
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* @param request
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* @return
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*/
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private static Map<String, Cookie> readCookieMap(HttpServletRequest request) {
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Map<String, Cookie> cookieMap = new HashMap<String, Cookie>();
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Cookie[] cookies = request.getCookies();
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if (null != cookies) {
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for (Cookie cookie : cookies) {
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cookieMap.put(cookie.getName(), cookie);
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}
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}
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return cookieMap;
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}
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/**
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* 保存Cookies
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*
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* @param response
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* servlet请求
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* @param value
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* 保存值
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* @author jxf
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*/
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public static HttpServletResponse setCookie(HttpServletResponse response, String name, String value, int time,String domain) {
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// new一个Cookie对象,键值对为参数
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Cookie cookie = new Cookie(name, value);
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// tomcat下多应用共享
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cookie.setPath("/");
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cookie.setDomain(domain);
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// 如果cookie的值中含有中文时，需要对cookie进行编码，不然会产生乱码
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try {
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URLEncoder.encode(value, "utf-8");
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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cookie.setMaxAge(time);
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// 将Cookie添加到Response中,使之生效
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// addCookie后，如果已经存在相同名字的cookie，则最新的覆盖旧的cookie
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response.addCookie(cookie);
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return response;
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}
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}
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