Java Cookie工具类，Java CookieUtils 工具类，Java如何增加Cookie

Java Cookie工具类，Java CookieUtils 工具类，Java如何增加Cookie

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©Copyright 蕃薯耀 2017年7月15日

http://www.cnblogs.com/fanshuyao/

import java.io.IOException;
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 CookieUtils {

	public static final int COOKIE_MAX_AGE = 7 * 24 * 3600;
	public static final int COOKIE_HALF_HOUR = 30 * 60;

    /**
     * 根据Cookie名称得到Cookie对象，不存在该对象则返回Null
     *
     * @param request
     * @param name
     * @return
     */
    public static Cookie getCookie(HttpServletRequest request, String name) {
        Cookie[] cookies = request.getCookies();
        if (StrUtils.isEmptyArray(cookies)) {
            return null;
        }
        Cookie cookie = null;
        for (Cookie c : cookies) {
            if (name.equals(c.getName())) {
                cookie = c;
                break;
            }
        }
        return cookie;
    }

    /**
     * 根据Cookie名称直接得到Cookie值
     *
     * @param request
     * @param name
     * @return
     */
    public static String getCookieValue(HttpServletRequest request, String name) {
        Cookie cookie = getCookie(request, name);
        if(cookie != null){
        	return cookie.getValue();
        }
        return null;
    }

    /**
     * 移除cookie
     * @param request
     * @param response
     * @param name 这个是名称，不是值
     */
    public static void removeCookie(HttpServletRequest request,
            HttpServletResponse response, String name) {
        if (null == name) {
            return;
        }
        Cookie cookie = getCookie(request, name);
        if(null != cookie){
            cookie.setPath("/");
            cookie.setValue("");
            cookie.setMaxAge(0);
            response.addCookie(cookie);
        }
    }

    /**
     * 添加一条新的Cookie，可以指定过期时间(单位：秒)
     *
     * @param response
     * @param name
     * @param value
     * @param maxValue
     */
    public static void setCookie(HttpServletResponse response, String name,
            String value, int maxValue) {
        if (StrUtils.isBlank(name)) {
            return;
        }
        if (null == value) {
            value = "";
        }
        Cookie cookie = new Cookie(name, value);
        cookie.setPath("/");
        if (maxValue != 0) {
            cookie.setMaxAge(maxValue);
        } else {
            cookie.setMaxAge(COOKIE_HALF_HOUR);
        }
        response.addCookie(cookie);
        try {
			response.flushBuffer();
		} catch (IOException e) {
			e.printStackTrace();
		}
    } 

    /**
     * 添加一条新的Cookie，默认30分钟过期时间
     *
     * @param response
     * @param name
     * @param value
     */
    public static void setCookie(HttpServletResponse response, String name,
            String value) {
        setCookie(response, name, value, COOKIE_HALF_HOUR);
    }  

	/**
	 * 将cookie封装到Map里面
	 * @param request
	 * @return
	 */
	public static Map<String,Cookie> getCookieMap(HttpServletRequest request){
	    Map<String,Cookie> cookieMap = new HashMap<String,Cookie>();
	    Cookie[] cookies = request.getCookies();
	    if(!StrUtils.isEmptyArray(cookies)){
	        for(Cookie cookie : cookies){
	            cookieMap.put(cookie.getName(), cookie);
	        }
	    }
	    return cookieMap;
	}

}

　　

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©Copyright 蕃薯耀 2017年7月15日

http://www.cnblogs.com/fanshuyao/