MD5加密util

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package cn.ipanel.apps.portalBackOffice.util.md5;import java.security.MessageDigest;import org.apache.log4j.Logger;/** * MD5 的加密 *  * @author tianwl * @datetime 2010-8-17 下午05:11:29 */public class MD5 {private static Logger logger = Logger.getLogger(MD5.class);/** * 對字符串進行MD5加密 * @author tianwl * @param s * @return */public final static String getStringMD5(String s) {byte[] strTemp = s.getBytes();return MD5.getByteArrayMD5(strTemp);}/** * 對byte数组進行MD5加密 * @author tianwl * @param source * @return */public final static String getByteArrayMD5(byte[] source) {char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9','a', 'b', 'c', 'd', 'e', 'f' };try {// 使用MD5创建MessageDigest对象MessageDigest mdTemp = MessageDigest.getInstance("MD5");mdTemp.update(source);byte[] md = mdTemp.digest();int j = md.length;char str[] = new char[j * 2];int k = 0;for (int i = 0; i < j; i++) {byte b = md[i];// 将没个数(int)b进行双字节加密str[k++] = hexDigits[b >> 4 & 0xf];str[k++] = hexDigits[b & 0xf];}return new String(str);} catch (Exception e) {logger.error(e,e);return null;}}/** * 得到图片的MD5，也可以用于二级栏目的MD5 * @author tianwl * @param pic 图片的字符串  * @param url * @return */public static String getPictureMD5(String pic,String url){String md5 = "";StringBuffer sb = new StringBuffer(pic);sb.append(url);md5 = MD5.getStringMD5(new String(sb));return md5;}/** * 生成重庆的二级菜单的resourceNameMD5 * @author tianwl * @param name * @param url * @param channelType * @param services 如果没有此数据 输入 "" * @return */public static String getMenuMD5(String name ,String url,String channelType ,String services){String md5 = "";StringBuffer sb = new StringBuffer(name);sb.append(url);sb.append(channelType);if(services != null && !services.equals("")){sb.append(services);}md5 = MD5.getStringMD5(new String(sb));return md5;}public static void main(String[] args) {System.out.println(MD5.getStringMD5("aaaaaaaaaaaaaaaaaaa"));byte[] source = "aaaaaaaaaaaaaaaaaaa".getBytes();System.out.println(MD5.getByteArrayMD5(source));logger.info(MD5.getPictureMD5("asdfasdfadf", "www.163.com"));}}
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