MD5Util加密工具

package com.hy.oms.utils;
import java.security.MessageDigest;
public class MD5Util {
    private static final String TAG = "MD5";
    /**
     * MD5加密得到唯一值
     * @param string
     * @return
     */
    public static String getMD5(String string) {
        String s = null;
        char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
                'A', 'B', 'C', 'D', 'E', 'F' };
        try {
            MessageDigest md = MessageDigest.getInstance(TAG);
            md.update(string.getBytes());
            byte[] tmp = md.digest();
            char[] str = new char[32];
            int k = 0;
            for (int i = 0; i < 16; i++) {
                byte byte0 = tmp[i];
                str[(k++)] = hexDigits[(byte0 >>> 4 & 0xF)];
                str[(k++)] = hexDigits[(byte0 & 0xF)];
            }
            s = new String(str);
        } catch (Exception e) {
            //Log.e(TAG, e.getMessage());
        }
        return s;
    }
}