java 生成文件或者字符串的 md5，javamd5,String plain

java 生成文件或者字符串的 md5，javamd5,String plain

String plaintext = 'your text here';MessageDigest m = MessageDigest.getInstance("MD5");m.reset();m.update(plaintext.getBytes());byte[] digest = m.digest();BigInteger bigInt = new BigInteger(1,digest);String hashtext = bigInt.toString(16);// Now we need to zero pad it if you actually want the full 32 chars.while(hashtext.length() < 32 ){  hashtext = "0"+hashtext;}