자바 의 AES 와 DES 암호 화

/**
* 2019-05-31 by wx AES    demo
* */
public class AESTest {
   /*
    *   
    * 1.       
    * 2.  ecnodeRules          
    * 3.    
    * 4.         
    * 5.    
    * 6.     
    */
   public static String encrypt(String pwd ,String content){

       try {
           //  AES key   
           KeyGenerator kgen = KeyGenerator.getInstance("AES");
           //             128  key   
           //     ，SecureRandom          ，pwd.getBytes()   ，      ，     ，       pwd  
           kgen.init(128,new SecureRandom(pwd.getBytes()));
          //
           SecretKey secretKey = kgen.generateKey();//          
           byte [] enCodeFormat = secretKey.getEncoded();//          ，          ，   null
           //   AES    
           SecretKeySpec key = new SecretKeySpec(enCodeFormat,"AES");
          //     
           Cipher cipher = Cipher.getInstance("AES");
           //            
           cipher.init(Cipher.ENCRYPT_MODE,key);
           //           (      utf-8)                        
           byte[] byteContent = content.getBytes("utf-8");

           //  
           byte[] result =cipher.doFinal(byteContent);
          //            
           String s = new String (new BASE64Encoder().encode(result));

           return s;
       }catch (NoSuchPaddingException e) {
           e.printStackTrace();
       }
       catch (NoSuchAlgorithmException e) {
           e.printStackTrace();
       }catch (UnsupportedEncodingException e) {
           e.printStackTrace();
       }catch (InvalidKeyException e) {
           e.printStackTrace();
       }catch (IllegalBlockSizeException e) {
           e.printStackTrace();
       } catch (BadPaddingException e) {
           e.printStackTrace();
       }
       return null;
   }
   /*
    *   
    *     ：
    * 1.   1-4 
    * 2.           byte[]  
    * 3.       
    */
   public static String deencrty(String pwd,String content){
       try {
           //1.       ，  AES  ，      
           KeyGenerator kgen = KeyGenerator.getInstance("AES");
           //2.  pwd        
           //    128     ，         
           kgen.init(128,new SecureRandom(pwd.getBytes()));
           //3.        
           SecretKey ori_key =kgen.generateKey();
           //4.             
           byte[] raw =ori_key.getEncoded();
           //5.        AES  
           SecretKey key =new SecretKeySpec(raw ,"AES");
           //6.      AES     
           Cipher cipher = Cipher.getInstance("AES");
           //7.       ，          ，       key
           cipher.init(Cipher.DECRYPT_MODE,key);
           //8.                 
           byte[] byte_content = new BASE64Decoder().decodeBuffer(content);
           //  
           byte[] result = cipher.doFinal(byte_content);
           String re = new String (result,"utf-8");
           return re;

       } catch (NoSuchAlgorithmException e) {
           e.printStackTrace();
       }catch (NoSuchPaddingException e) {
           e.printStackTrace();
       }catch (InvalidKeyException e) {
           e.printStackTrace();
       }catch (IOException e) {
           e.printStackTrace();
       }catch (IllegalBlockSizeException e) {
           e.printStackTrace();
       } catch (BadPaddingException e) {
           e.printStackTrace();
       }
       return null;
   }
   public static void main (String[] args){
       Scanner scanner = new Scanner(System.in);
       //  
       System.out.println("  AES     ，        ：");
       String key = scanner.next();
       System.out.println("         ：");
       String content = scanner.next();
       String re = encrypt(key,content);
       System.out.println("     key      ："+ re);

       //  
       System.out.println("  AES    ，        ：         ");
       key = scanner.next();
       System.out.println("         ：");
       content = scanner.next();
      String le=  deencrty(key,content);
       System.out.println("       key       ："+le);
   }