学步园

怕忘了，留着吧。

private String getMD5Str(String str) {<br /> MessageDigest messageDigest = null; </p> <p> try {<br /> messageDigest = MessageDigest.getInstance("MD5"); </p> <p> messageDigest.reset(); </p> <p> messageDigest.update(str.getBytes("UTF-8"));<br /> } catch (NoSuchAlgorithmException e) {<br /> System.out.println("NoSuchAlgorithmException caught!");<br /> System.exit(-1);<br /> } catch (UnsupportedEncodingException e) {<br /> e.printStackTrace();<br /> } </p> <p> byte[] byteArray = messageDigest.digest(); </p> <p> StringBuffer md5StrBuff = new StringBuffer(); </p> <p> for (int i = 0; i < byteArray.length; i++) {<br /> if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)<br /> md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));<br /> else<br /> md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));<br /> } </p> <p> return md5StrBuff.toString();<br /> }