Java SHA 不工作。哈希值不等于字符串。我的编码有问题吗？

Question

基本上我有这个

   if (args.length != 1) {
        System.err.println("Usage: java MyMd5 <message>");
        System.exit(1);
    }
    try {
        // get message
        byte[] message = args[0].getBytes("UTF8");
        // create message digest object for MD5
        MessageDigest messageDigest = MessageDigest.getInstance("SHA");
        // System.out.println("Provider: " +
        messageDigest.getProvider().getInfo();
        // create message digest
        messageDigest.update(message);
        byte[] md = messageDigest.digest();
        // print result
        System.out.println("Message Digest Algorithm: MD5");
        System.out.println("Message: " + new String(message));
        System.out.println("Message Digest: \"" + new String(md, "UTF8") + "\"");
        String HashPassword=new String(md, "UTF8");
        System.out.println(HashPassword);
        System.out.println(HashPassword.equals("???8p???W?B:??N?~"));

但不知何故，当我尝试比较时，它返回 false。是我的编码有问题吗？谢谢!

    Message Digest Algorithm: MD5 
    Message: pass123
    Message Digest: "???8p???W?B:??N?~"
    ???8p???W?B:??N?~
    false

Answer 1

问题在于不必要的编码，使用 md5 我们必须以正确的方式对字符串进行编码，而不是使用 UTF8 编码

public static void main(String[] args) throws Exception {
    String pass = "pass123";
    byte[] message = pass.getBytes();
    MessageDigest messageDigest = MessageDigest.getInstance("SHA");
    messageDigest.update(message);
    byte[] md = messageDigest.digest();
    StringBuffer sb = new StringBuffer();
    for (int i = 0; i < md.length; i++) {
        sb.append(Integer.toString((md[i] & 0xff) + 0x100, 16).substring(1));
    }
    System.out.println("encoded pass:" + sb.toString());
    System.out.println(sb.toString().equals("aafdc23870ecbcd3d557b6423a8982134e17927e"));
}