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作者 求教有关javaIO的问题,谢谢!
welcomeriver





发贴: 9
积分: 0
于 2005-03-17 15:04 user profilesend a private message to usersend email to welcomeriversearch all posts byselect and copy to clipboard. 
ie only, sorry for netscape users:-)add this post to my favorite list
import java.io.*;
import java.security.*;
import javax.crypto.*;

public class StreamIn
{
public static void main(String[] args) throws Exception
{
FileInputStream f = new FileInputStream("key1.dat");
ObjectInputStream b = new ObjectInputStreamRose;
Key k = (Key)b.readObject();

Cipher cp = Cipher.getInstance("DESede");
cp.init(Cipher.ENCRYPT_MODE, k);

FileInputStream in = new FileInputStream("test1.txt");
CipherInputStream cin = new CipherInputStream(in, cp);
int num = in.available();
byte ptext[] = new byte[num];
cin.read(ptext);

FileOutputStream out = new FileOutputStream("test2.txt");
Cipher cp1 = Cipher.getInstance("DESede");
cp1.init(Cipher.DECRYPT_MODE, k);
CipherOutputStream cout = new CipherOutputStream(out, cp1);

cout.write(ptext);

cout.close();
out.close();
in.close();
cin.close();
}
}

为什么输出文件 test2.txt 总是空的呢?




话题树型展开
人气 标题 作者 字数 发贴时间
4148 求教有关javaIO的问题,谢谢! welcomeriver 954 2005-03-17 15:04
3336 Re:求教有关javaIO的问题,谢谢! welcomeriver 66 2005-03-17 15:06

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