• Cookie工具类(获取cookie,设置cookie)


    import java.io.UnsupportedEncodingException;

    import java.net.URLDecoder;
    import java.net.URLEncoder;

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

    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;

    /**
    *
    * Cookie 工具类
    *
    */
    public final class CookieUtils {

    protected static final Logger logger = LoggerFactory.getLogger(CookieUtils.class);

    /**
    * 得到Cookie的值, 不编码
    *
    * @param request
    * @param cookieName
    * @return
    */
    public static String getCookieValue(HttpServletRequest request, String cookieName) {
    return getCookieValue(request, cookieName, false);
    }

    /**
    * 得到Cookie的值,
    *
    * @param request
    * @param cookieName
    * @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) {
    logger.error("Cookie Decode Error.", e);
    }
    return retValue;
    }

    /**
    * 得到Cookie的值,
    *
    * @param request
    * @param cookieName
    * @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) {
    logger.error("Cookie Decode Error.", e);
    }
    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
    */
    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
    */
    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,但编码
    */
    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
    */
    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)
    */
    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
    */
    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 cookieMaxage
    * cookie生效的最大秒数
    */
    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
    cookie.setDomain(getDomainName(request));
    cookie.setPath("/");
    response.addCookie(cookie);
    } catch (Exception e) {
    logger.error("Cookie Encode Error.", e);
    }
    }

    /**
    * 设置Cookie的值,并使其在指定时间内生效
    *
    * @param cookieMaxage
    * cookie生效的最大秒数
    */
    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
    cookie.setDomain(getDomainName(request));
    cookie.setPath("/");
    response.addCookie(cookie);
    } catch (Exception e) {
    logger.error("Cookie Encode Error.", e);
    }
    }

    /**
    * 得到cookie的域名
    */
    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;
    }

    }

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  • 原文地址:https://www.cnblogs.com/lingtiaoti/p/9503300.html
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