import java.io.IOException;
import java.security.GeneralSecurityException;
import java.security.MessageDigest;
public class Utils {
public static String digest(String token) throws GeneralSecurityException, IOException {
MessageDigest sha1 = MessageDigest.getInstance("SHA1");
return byteArrayToHexStr(sha1.digest(token.getBytes("UTF-8")));
}
private static String byteArrayToHexStr(byte[] data) {
char[] chars = new char[data.length * 2];
for (int i = 0; i < data.length; i++) {
byte current = data[i];
int hi = (current & 0xF0) >> 4;
int lo = current & 0x0F;
chars[2 * i] = (char) (hi < 10 ? ('0' + hi) : ('A' + hi - 10));
chars[2 * i + 1] = (char) (lo < 10 ? ('0' + lo) : ('A' + lo - 10));
}
return new String(chars);
}
}