|
import java.security.MessageDigest;
import java.security.DigestInputStream;
import java.io.InputStream;
import java.io.BufferedInputStream;
public class MD5Util {
public static String computeMD5(String input) {
MessageDigest digest;
try {
digest = MessageDigest.getInstance("MD5");
digest.update(input.getBytes("UTF-8"));
} catch (Exception e) {
throw new RuntimeException(e);
}
byte[] digestBytes = digest.digest();
StringBuffer hexString = new StringBuffer();
for (byte digestByte : digestBytes) {
hexString.append(Integer.toHexString(0xFF & digestByte));
}
return hexString.toString();
}
public static String computeMD5(InputStream stream) {
MessageDigest digest;
try {
digest = MessageDigest.getInstance("MD5");
DigestInputStream digestStream = new DigestInputStream(stream, digest);
while (digestStream.read() != -1) {
; //digest is updating
}
} catch (Exception e) {
throw new RuntimeException(e);
}
byte[] digestBytes = digest.digest();
StringBuffer hexString = new StringBuffer();
for (byte digestByte : digestBytes) {
hexString.append(Integer.toHexString(0xFF & digestByte));
}
return hexString.toString();
}
}
|