/** 对文件进行散列, 支持md5与sha1算法. */
private static String digest(InputStream input, String algorithm) throws IOException {
try {
MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
int bufferLength = 1024;
byte[] buffer = new byte[bufferLength];
int read = input.read(buffer, 0, bufferLength);
while (read > -1) {
messageDigest.update(buffer, 0, read);
read = input.read(buffer, 0, bufferLength);
}
return EncodeUtil.hexEncode(messageDigest.digest());
} catch (GeneralSecurityException e) {
throw new IllegalStateException("Security exception", e);
}
}
/** 对输入字符串进行sha1散列, 返回Base64编码的URL安全的结果. */
public static String sha1ToBase64UrlSafe(String input) {
byte[] digestResult = digest(input, SHA1);
return EncodeUtil.base64UrlSafeEncode(digestResult);
}
/** 对输入字符串进行sha1散列, 返回Hex编码的结果. */
public static String sha1ToHex(String input) {
byte[] digestResult = digest(input, SHA1);
return EncodeUtil.hexEncode(digestResult);
}