原文地址：http://www.work100.net/tools/code-java/cookie-utils.html
更多教程：光束云 - 免费课程
CookieUtils
Java 中对 Cookie 操作的工具类。
源码如下：
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
/**
* <p>Title: CookieUtils</p>
* <p>Description: </p>
* <p>Url: http://www.work100.net/tools/code-java/cookie-utils.html</p>
*
* @author liuxiaojun
* @date 2020-02-15 11:36
* ------------------- History -------------------
* <date> <author> <desc>
* 2020-02-15 liuxiaojun 初始创建
* -----------------------------------------------
*/
public final class CookieUtils {
/**
* 得到Cookie的值（不解码)
*
* @param request 请求
* @param cookieName Cookie名称
* @return
*/
public static String getCookieValue(HttpServletRequest request, String cookieName) {
return getCookieValue(request, cookieName, false);
}
/**
* 得到Cookie的值
*
* @param request 请求
* @param cookieName Cookie名称
* @param isDecoder 是否解码
* @return
*/
public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) {
Cookie[] cookieList = request.getCookies();
if (cookieList == null || cookieName == null) {
return null;
}
String retValue = null;
try {
for (int i = 0; i < cookieList.length; i++) {
if (cookieList[i].getName().equals(cookieName)) {
if (isDecoder) {
retValue = URLDecoder.decode(cookieList[i].getValue(), "UTF-8");
} else {
retValue = cookieList[i].getValue();
}
break;
}
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return retValue;
}
/**
* 得到Cookie的值
*
* @param request 请求
* @param cookieName Cookie名称
* @param encodeString 编码格式
* @return
*/
public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) {
Cookie[] cookieList = request.getCookies();
if (cookieList == null || cookieName == null) {
return null;
}
String retValue = null;
try {
for (int i = 0; i < cookieList.length; i++) {
if (cookieList[i].getName().equals(cookieName)) {
retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);
break;
}
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return retValue;
}
/**
* 设置Cookie的值 不设置生效时间默认浏览器关闭即失效,也不编码
*
* @param request 请求
* @param response 响应
* @param cookieName Cookie名称
* @param cookieValue Cookie值
*/
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue) {
setCookie(request, response, cookieName, cookieValue, -1);
}
/**
* 设置Cookie的值 在指定时间内生效,但不编码
*
* @param request 请求
* @param response 响应
* @param cookieName Cookie名称
* @param cookieValue Cookie值
* @param cookieMaxage cookie生效的最大秒数
*/
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage) {
setCookie(request, response, cookieName, cookieValue, cookieMaxage, false);
}
/**
* 设置Cookie的值 不设置生效时间
*
* @param request 请求
* @param response 响应
* @param cookieName Cookie名称
* @param cookieValue Cookie值
* @param isEncode 是否编码
*/
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, boolean isEncode) {
setCookie(request, response, cookieName, cookieValue, -1, isEncode);
}
/**
* 设置Cookie的值 在指定时间内生效, 编码参数
*
* @param request 请求
* @param response 响应
* @param cookieName Cookie名称
* @param cookieValue Cookie值
* @param cookieMaxage cookie生效的最大秒数
* @param isEncode 是否编码
*/
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {
doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);
}
/**
* 设置Cookie的值 在指定时间内生效, 编码参数(指定编码)
*
* @param request 请求
* @param response 响应
* @param cookieName Cookie名称
* @param cookieValue Cookie值
* @param cookieMaxage cookie生效的最大秒数
* @param encodeString 编码格式
*/
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, String encodeString) {
doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);
}
/**
* 删除Cookie带cookie域名
*
* @param request 请求
* @param response 响应
* @param cookieName Cookie名称
*/
public static void deleteCookie(HttpServletRequest request, HttpServletResponse response, String cookieName) {
doSetCookie(request, response, cookieName, "", -1, false);
}
/**
* 设置Cookie的值，并使其在指定时间内生效
*
* @param request 请求
* @param response 响应
* @param cookieName Cookie名称
* @param cookieValue Cookie值
* @param cookieMaxage cookie生效的最大秒数
* @param isEncode 是否编码
*/
private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {
try {
if (cookieValue == null) {
cookieValue = "";
} else if (isEncode) {
cookieValue = URLEncoder.encode(cookieValue, "utf-8");
}
Cookie cookie = new Cookie(cookieName, cookieValue);
if (cookieMaxage > 0) {
cookie.setMaxAge(cookieMaxage);
}
if (null != request) {
// 设置域名的cookie
String domainName = getDomainName(request);
if (!"localhost".equals(domainName)) {
cookie.setDomain(domainName);
}
}
cookie.setPath("/");
response.addCookie(cookie);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 设置Cookie的值，并使其在指定时间内生效
*
* @param request 请求
* @param response 响应
* @param cookieName Cookie名称
* @param cookieValue Cookie值
* @param cookieMaxage cookie生效的最大秒数
* @param encodeString 编码格式
*/
private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, String encodeString) {
try {
if (cookieValue == null) {
cookieValue = "";
} else {
cookieValue = URLEncoder.encode(cookieValue, encodeString);
}
Cookie cookie = new Cookie(cookieName, cookieValue);
if (cookieMaxage > 0)
cookie.setMaxAge(cookieMaxage);
if (null != request) {
// 设置域名的cookie
String domainName = getDomainName(request);
if (!"localhost".equals(domainName)) {
cookie.setDomain(domainName);
}
}
cookie.setPath("/");
response.addCookie(cookie);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 得到cookie的域名
*
* @param request 请求
* @return
*/
private static final String getDomainName(HttpServletRequest request) {
String domainName = null;
String serverName = request.getRequestURL().toString();
if (serverName == null || serverName.equals("")) {
domainName = "";
} else {
serverName = serverName.toLowerCase();
serverName = serverName.substring(7);
final int end = serverName.indexOf("/");
serverName = serverName.substring(0, end);
final String[] domains = serverName.split("\.");
int len = domains.length;
if (len > 3) {
// www.xxx.com.cn
domainName = "." + domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];
} else if (len <= 3 && len > 1) {
// xxx.com or xxx.cn
domainName = "." + domains[len - 2] + "." + domains[len - 1];
} else {
domainName = serverName;
}
}
if (domainName != null && domainName.indexOf(":") > 0) {
String[] ary = domainName.split("\:");
domainName = ary[0];
}
return domainName;
}
}
如果对课程内容感兴趣，可以扫码关注我们的
公众号或QQ群，及时关注我们的课程更新
