MD5Util.java

package com.hupu.games.common;


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

public class MD5Util {


	private static MessageDigest sMd5MessageDigest;
	private static StringBuilder sStringBuilder;

	static {
		try {
			sMd5MessageDigest = MessageDigest.getInstance("MD5");
		} catch (NoSuchAlgorithmException e) {
		}
		sStringBuilder = new StringBuilder();
	}

	private MD5Util() {
	}

	public static String md5(String s) {

		sMd5MessageDigest.reset();
		sMd5MessageDigest.update(s.getBytes());

		byte digest[] = sMd5MessageDigest.digest();

		sStringBuilder.setLength(0);
		for (int i = 0; i < digest.length; i++) {
			final int b = digest[i] & 255;
			if (b < 16) {
				sStringBuilder.append('0');
			}
			sStringBuilder.append(Integer.toHexString(b));
		}

		return sStringBuilder.toString();
	}
}