MD5Util.java

package lzf.video.edit.utils;

import java.security.MessageDigest;

/*************************************************
 * md5 类实现了RSA Data Security, Inc.在提交给IETF 的RFC1321中的MD5 message-digest 算法。
 *************************************************/

public class MD5Util {
	
    public static String getMD5Str(String src) {
        try {
            MessageDigest messageDigest = MessageDigest.getInstance("MD5");
            messageDigest.update(src.getBytes());
            return toHexString(messageDigest.digest());
        } catch (Exception e) {
        }
        return null;
    }

    private static String toHexString(byte[] b) {
        StringBuilder sb = new StringBuilder(b.length * 2);
        for (int i = 0; i < b.length; i++) {
            sb.append(Digit[(b[i] & 0xf0) >>> 4]);
            sb.append(Digit[b[i] & 0x0f]);
        }
        return sb.toString();
    }

    private static char[] Digit = {
            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
    };

}