TokenUtil.java

/* ==================================================================   
 * Created [2009-4-27 下午11:32:55] by Jon.King 
 * ==================================================================  
 * TSS 
 * ================================================================== 
 * mailTo:jinpujun@hotmail.com
 * Copyright (c) Jon.King, 2009-2012 
 * ================================================================== 
*/

package com.jinhe.tss.core.sso;

import com.jinhe.tss.core.util.InfoEncoder;

/**
 * <p> TokenUtil.java </p>
 * <p>
 * 令牌处理
 * </p>
 */
public class TokenUtil {
	
	private static InfoEncoder infoEncoder = new InfoEncoder();

	/**
	 * <p>
	 * 根据sessionId和UserId生成令牌
	 * </p>
	 * @param sessionId
	 * @param userId
	 * @return
	 */
	public static String createToken(String sessionId, Long userId) {
		if (sessionId != null && userId != null) {
			String originalToken = sessionId + "," + System.currentTimeMillis() + "," + userId;
			return infoEncoder.createEncryptor(originalToken);
		}
		return null;
	}

	/**
	 * <p>
	 * 根据用户令牌获取标准用户ID
	 * </p>
	 * @param token
	 * @return
	 */
	public static Long getUserIdFromToken(String token) {
		if (token != null) {
			String originalToken = infoEncoder.createDecryptor(token);
			int beginIndex = originalToken.lastIndexOf(",");
			String userId = originalToken.substring(beginIndex + 1);
			return new Long(userId);
		}
		return null;
	}
	
	/**
	 * <p>
	 * 根据用户令牌获取SessionId
	 * </p>
	 * @param token
	 * @return
	 */
	public static Long getSessionIdFromToken(String token) {
		if (token != null) {
			String originalToken = infoEncoder.createDecryptor(token);
			int index = originalToken.indexOf(",");
			String sessionId = originalToken.substring(0, index);
			return new Long(sessionId);
		}
		return null;
	}
}