Java Cookie工具类代码

​Java Cookie工具类代码​

1. 1. 
      
2. 添加cookie（设置有效时间）
3. 检索所有cookie 封装到map集合 以其cookie name作为key cookie value作为value
4. 通过cookie name 获取 cookie value

import java.util.HashMap;
import java.util.Map;

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

public class CookieTool {
    /**
     * 添加cookie
     * 
     * @param response
     * @param name
     * @param value
     * @param maxAge 有效时间
     */
    public static void addCookie(HttpServletResponse response, String name, String value, int maxAge) {
        Cookie cookie = new Cookie(name, value);
        cookie.setPath("/");
        cookie.setMaxAge(maxAge);
        cookie.setDomain(".189.cn"); // cookie作用域
        response.addCookie(cookie);
    }

    /**
     * 检索所有cookie 封装到map集合 以其cookie name作为key cookie value作为value
     * 
     * @param request
     * @return
     */
    public static Map<String, String> ReadCookieMap(HttpServletRequest request) {
        Map<String, String> cookieMap = new HashMap<String, String>();
        Cookie[] cookies = request.getCookies();
        if (null != cookies) {
            for (Cookie cookie : cookies) {
                cookieMap.put(cookie.getName(), cookie.getValue());
            }
        }
        return cookieMap;
    }

    /**
     * 通过cookie name 获取 cookie value
     * 
     * @param request
     * @param name
     * @return
     */
    public static String getCookieValueByName(HttpServletRequest request, String name) {
        Map<String, String> cookieMap = ReadCookieMap(request);
        if (cookieMap.containsKey(name)) {
            String cookieValue = (String) cookieMap.get(name);
            return cookieValue;
        } else {
            return null;
        }
    }

}

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