试试看：
public static String md5(String input) throws NoSuchAlgorithmException { String result = input; if(input != null) { MessageDigest md = MessageDigest.getInstance("MD5"); //or "SHA-1" md.update(input.getBytes()); BigInteger hash = new BigInteger(1, md.digest()); result = hash.toString(16); while(result.length() < 32) { //40 for SHA-1 result = "0" + result; } } return result;}来自http://web.archive.org/web/20140209230440/http://www.sergiy.ca/how-to-make-
java-md5-and-sha-1-hashes-compatible-with-
php-的代码or-mysql
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