問題描述

下面是一段Python的加密代碼 ：

import md5def encrypted_id(id): byte1 = bytearray(’3go8&$8*3*3h0k(2)2’) byte2 = bytearray(id) byte1_len = len(byte1) for i in xrange(len(byte2)):byte2[i] = byte2[i]^byte1[i%byte1_len] m = md5.new() m.update(byte2) result = m.digest().encode(’base64’)[:-1] result = result.replace(’/’, ’_’) result = result.replace(’+’, ’-’) return result

請(qǐng)問如何改寫為java代碼？下面是我改寫的java代碼，但是返回的結(jié)果始終為空：

public static String md5(String musicID) throws NoSuchAlgorithmException {System.out.print(musicID);String result;byte[] byte1, byte2;String word = '3go8&$8*3*3h0k(2)2';byte1 = word.getBytes();byte2 = musicID.getBytes();int byte2_len = byte2.length;int byte1_len=byte1.length;for (int i = 0; i < byte2_len; i++) { byte2[i] = (byte) (byte2[i] ^ byte1[i % byte1_len]);}MessageDigest md5 = MessageDigest.getInstance('MD5');md5.update(byte2);byte[] digest = md5.digest();result=new String(Base64.decodeBase64(digest));result = result.replace(’/’, ’_’);result = result.replace(’+’, ’-’);return result; }

問題解答

python md5之后是base64 encode

java md5之后是base64 decode