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java - 是否可以从 MD5 和 Java 恢复消息?

转载 作者:搜寻专家 更新时间:2023-10-31 08:17:23 25 4
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我有以下代码。

String plaintext = "HelloWorld";
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;
}

现在我想把它转换回原来的字符串。可能吗?

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