呦呦checknowCookieutil来一套(对cookie的增删改查的一个util)!!!

package utils;


import java.io.Serializable;
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;


/**
 *
 * COOKIE 工具类
 *
 */
public final class COOKIEUtils  {

    /**
     * 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                 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
     * @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                 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
     */
    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
                String domainName = getDomainName(request);
                System.out.println(domainName);
                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 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
                String domainName = getDomainName(request);
                System.out.println(domainName);
                if (!"localhost".equals(domainName)) {
                    COOKIE.setDomain(domainName);
                }
            }
            COOKIE.setPath("/");
            response.addCOOKIE(COOKIE);
        } catch (Exception e) {
             e.printStackTrace();
        }
    }

    /**
     * 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;
    }

}