基于java的DES加密解密算法实现

import java.io.*; import java.security.*; import javax.crypto.*; public class SEnc //基于DES的对称加密算法 { public static void main(String args[])throws Exception { String s="Hello World!"; FileInputStream f=new FileInputStream("key1.dat"); ObjectInputStream b=new ObjectInputStream(f); Key k=(Key)b.readObject(); Cipher cp=Cipher.getInstance("DESede"); cp.init(Cipher.ENCRYPT_MODE,k); byte ptext[]=s.getBytes("UTF8"); for(int i=0;i<ptext.length;i++) { System.out.print(ptext[i]+","); } System.out.println(""); byte ctext[]=cp.doFinal(ptext); for(int i=0;i<ctext.length;i++) { System.out.print(ctext[i]+","); } FileOutputStream f2=new FileOutputStream("SEnc.dat"); f2.write(ctext); } }