KeyUtils工具类，包含了MD5和token生成策略

package com.hxkj.fsslr.core.utils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class KeyUtils {

	/**
	 * @Title: getMD5String 
	 * @Description:     MD5方法
	 * @param sourceStr
	 * @return   
	 * @return String    
	 * @author huzhihui_c@qq.com
	 * @date 2016年7月18日 下午5:26:21
	 */
	public static String getMD5String(String sourceStr){
		String result = "";
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(sourceStr.getBytes());
            byte b[] = md.digest();
            int i;
            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < b.length; offset++) {
                i = b[offset];
                if (i < 0)
                    i += 256;
                if (i < 16)
                    buf.append("0");
                buf.append(Integer.toHexString(i));
            }
            result = buf.toString();
        } catch (NoSuchAlgorithmException e) {
            System.out.println(e);
        }
        return result;
	}
	
	/**
	 * @Title: getTokenString 
	 * @Description:     toekn生成策略
	 * @param sourceStr
	 * @return   
	 * @return String    
	 * @author huzhihui_c@qq.com
	 * @date 2016年7月18日 下午5:26:30
	 */
	public static String getTokenString(String sourceStr){
		String result = getMD5String(sourceStr /*+ System.currentTimeMillis()*/);
		StringBuilder sb = new StringBuilder("");
		sb.append(result.substring(8, 15));
		sb.append("-");
		sb.append(result.substring(0, 7));
		sb.append("-");
		sb.append(result.substring(24, 32));
		sb.append("-");
		sb.append(result.substring(16, 23));
		return sb.toString();
	}
}