Java版Mysql4.1之后的password()的sha1加密算法。

package mytest;

import java.io.UnsupportedEncodingException;

import org.apache.commons.codec.digest.DigestUtils;

public class MySQLNewPassword {
	public static String getMySQLPassword(String plainText)
			throws UnsupportedEncodingException {
		byte[] utf8 = plainText.getBytes("UTF-8");
		byte[] test = DigestUtils.sha(DigestUtils.sha(utf8));
		return "*" + convertToHex(test).toUpperCase();
	}

	private static String convertToHex(byte[] data) {
		StringBuilder buf = new StringBuilder();
		for (int i = 0; i < data.length; i++) {
			int halfbyte = (data[i] >>> 4) & 0x0F;
			int two_halfs = 0;
			do {
				if ((0 <= halfbyte) && (halfbyte <= 9))
					buf.append((char) ('0' + halfbyte));
				else
					buf.append((char) ('a' + (halfbyte - 10)));
				halfbyte = data[i] & 0x0F;
			} while (two_halfs++ < 1);
		}
		return buf.toString();
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try {
			System.out.println(getMySQLPassword("qq123456"));
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

}