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import java.io.*;
import java.security.*;
import java.util.*;
class ReturnDigest extends Thread
{
private File input;
public ReturnDigest(File input)
{
this.input =input;
}
public void run()
{
try
{
FileInputStream in = new FileInputStream(input);
MessageDigest sha = MessageDigest.getInstance ("SHA");
DigestInputStream din = new DigestInputStream(in,sha);
int b;
while((b = din.read())!=-1);
din.close();
byte[] digest = sha.digest();
digest = sha.digest();
//System.out.println( digest );
}
catch (IOException ex)
{
System.err.println(ex);
}
catch (NoSuchAlgorithmException ex)
{
System.err.println(ex);
}
}
public byte[] getDigest()
{
return digest;
}
}
public class ReturnDigestUserInterface
{
public static void main(String[] args)
{
for (int i=0 ; i<args.length ; i++ )
{
File f = new File(args[i]);
ReturnDigest dr = new Return Digest(f);
dr.start();
//显示结果
StringBuffer result = new StringBuffer (f.toString());
result.append(": ");
byte[] digest = dr.getDigest();
for( int j =0 ;j <digest.length; j++)
{
result.append (digest[j]+" ");
}
System.out.println(result);
}
}
}