com.github.hdy.common.util.CookiesUtil Maven / Gradle / Ivy
package com.github.hdy.common.util;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
/**
* Cookie工具类
*
* @author hdy
* @date 2019/7/23
*/
public class CookiesUtil {
/**
* 根据名字获取cookie
*
* @param request
* @param name cookie名字
*
* @return
*/
public static String getCookieByName(HttpServletRequest request, String name) {
Map cookieMap = ReadCookieMap(request);
if (cookieMap.containsKey(name)) {
Cookie cookie = cookieMap.get(name);
return cookie.getValue();
} else {
return null;
}
}
/**
* 将cookie封装到Map里面
*
* @param request
*
* @return
*/
private static Map ReadCookieMap(HttpServletRequest request) {
Map cookieMap = new HashMap();
Cookie[] cookies = request.getCookies();
if (null != cookies) {
for (Cookie cookie : cookies) {
cookieMap.put(cookie.getName(), cookie);
}
}
return cookieMap;
}
/**
* 保存Cookies
*
* @param response servlet请求
* @param value 保存值
*
* @author jxf
*/
public static HttpServletResponse setCookie(HttpServletResponse response, String name, String value, int time) {
// new一个Cookie对象,键值对为参数
Cookie cookie = new Cookie(name, value);
// tomcat下多应用共享
cookie.setPath("/");
// 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
try {
URLEncoder.encode(value, "utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
cookie.setMaxAge(time);
// 将Cookie添加到Response中,使之生效
response.addCookie(cookie); // addCookie后，如果已经存在相同名字的cookie，则最新的覆盖旧的cookie
return response;
}
/**
* 清除cookie
*
* @param response
* @param name
*/
public static void removeCookie(HttpServletResponse response, String name) {
setCookie(response, name, "", 0);
}
}