Java操作Cookie

最新推荐文章于 2023-09-05 21:00:00 发布

moonights

最新推荐文章于 2023-09-05 21:00:00 发布

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分类专栏： Java 文章标签： Java Servlet

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本文介绍了一个用于处理HTTP Cookie的Java工具类，包括设置、获取及删除Cookie的方法实现。该工具类简化了Web应用中Cookie的操作流程。

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package com.moonights.tools;

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

public class CookieUtil {
	public static Cookie getCookie(HttpServletRequest request, String name) {
		Cookie cookies[] = request.getCookies();
		if (cookies == null || name == null || name.length() == 0) {
			return null;
		}
		for (int i = 0; i < cookies.length; i++) {
			if (name.equals(cookies[i].getName())
					&& request.getServerName().equals(cookies[i].getDomain())) {
				return cookies[i];
			}
		}
		return null;
	}

	public static void deleteCookie(HttpServletRequest request,
			HttpServletResponse response, Cookie cookie) {
		if (cookie != null) {
			cookie.setPath(getPath(request));
			cookie.setValue("");
			cookie.setMaxAge(0);
			response.addCookie(cookie);
		}
	}

	public static void setCookie(HttpServletRequest request,
			HttpServletResponse response, String name, String value) {
		setCookie(request, response, name, value, 0x278d00);
	}

	public static void setCookie(HttpServletRequest request,
			HttpServletResponse response, String name, String value, int maxAge) {
		Cookie cookie = new Cookie(name, value == null ? "" : value);
		cookie.setMaxAge(maxAge);
		cookie.setPath(getPath(request));
		response.addCookie(cookie);
	}

	private static String getPath(HttpServletRequest request) {
		String path = request.getContextPath();
		return (path == null || path.length() == 0) ? "/" : path;
	}

}