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abstract public class Subject
{
    abstract public void request();
}
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public class RealSubject extends Subject
{
       public RealSubject()
       {
       }
      
       public void request()
       {
              System.out.println("from real subject.");
       }
}
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public class ProxySubject extends Subject
{
    private RealSubject realSubject;  //ÒÔÕæÊµ½ÇÉ«×÷Ϊ´úÀí½ÇÉ«µÄÊôÐÔ
      
       public ProxySubject()
       {
       }
       public void request()  //¸Ã·½·¨·â×°ÁËÕæÊµ¶ÔÏóµÄrequest·½·¨
       {
        preRequest(); 
              if( realSubject == null )
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java php DES ¼ÓÃܽâÃÜ

import java.io.IOException;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class DES {
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MD5 java bean


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MD5 Ëã·¨µÄJava Bean
*************************************************/
package beartool;
import java.lang.reflect.*;
public class MD5 {
    /* ÏÂÃæÕâЩS11-S44ʵ¼ÊÉÏÊÇÒ»¸ö4*4µÄ¾ ......
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