JAVA 매개 변수의 암호 화 및 복호화

package com.util;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.security.MessageDigest;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;


public class endecrypt {
	/** 
	 *   MD5   
	 * @param  String    SPKEY 
	 * @return  byte[]        md5  byte[] 
	 */  
	  
	private byte[] md5(String strSrc)  
	{  
	byte[] returnByte = null;  
	try  
	{  
	MessageDigest md5 = MessageDigest.getInstance("MD5");   
	returnByte = md5.digest(strSrc.getBytes("GBK"));  
	}  
	catch(Exception e)  
	{  
	e.printStackTrace();  
	}  
	return returnByte;  
	}    
	  
	  
	/** 
	 *   3-DES     
	 *       ，    24   ，md5      16   ，     8    0 
	         * @param  String    SPKEY 
	 * @return  byte[]        md5  byte[] 
	 */  
	  
	private byte[] getEnKey(String spKey)  
	{  
	byte[] desKey=null;  
	try  
	{  
	  byte[] desKey1 = md5(spKey);  
	  desKey = new byte[24];  
	  int i = 0;  
	  while (i < desKey1.length && i < 24) {  
	desKey[i] = desKey1[i];  
	i++;  
	  }  
	  if (i < 24) {           
	desKey[i] = 0;  
	i++;  
	  }  
	}  
	catch(Exception e){  
	  e.printStackTrace();  
	}  
	  
	return desKey;  
	}  
	  
	  
	  
	/** 
	  * 3-DES   
	  * @param byte[] src    3-DES   byte[] 
	  * @param   byte[] enKey 3-DES     
	  * @return  byte[] 3-DES    byte[] 
	  */  
	   
	 public byte[] Encrypt(byte[] src,byte[] enKey)  
	 {  
	  byte[] encryptedData = null;  
	  try  
	  {  
	  DESedeKeySpec dks = new DESedeKeySpec(enKey);   
	  SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");   
	  SecretKey key = keyFactory.generateSecret(dks);   
	  Cipher cipher = Cipher.getInstance("DESede");   
	  cipher.init(Cipher.ENCRYPT_MODE, key);   
	  encryptedData = cipher.doFinal(src);   
	  }  
	  catch(Exception e)  
	  {  
	  e.printStackTrace();  
	  }  
	  return encryptedData;  
	 }  
	  
	   
	  
	  
	 /** 
	  *       Base64   
	  * @param byte[] src          
	  *  
	  * @return  String           
	  */  
	   
	 public String getBase64Encode(byte[] src)  
	 {  
	  String requestValue="";  
	  try{  
	    BASE64Encoder base64en = new BASE64Encoder();  
	    requestValue=base64en.encode(src);   
	    //System.out.println(requestValue);  
	  }  
	  catch(Exception e){  
	    e.printStackTrace();  
	  }  
	    
	  return requestValue;  
	 }  
	   
	   
	  
	/** 
	 *            
	 * base64  3-DES    ，            
	 * ，     ，  uni-wise          ，  
	 *   “sp    ”。       ，            ， 
	 *                       ，              ， 
	 *           。                         。 
	 *   c#           ，        。  
	 *  
	     */  
	  
	 private String filter(String str)  
	 {  
	  String output = null;  
	  StringBuffer sb = new StringBuffer();  
	  for(int i = 0; i < str.length(); i++)  
	  {  
	  int asc = str.charAt(i);  
	  if(asc != 10 && asc != 13)  
	  sb.append(str.subSequence(i, i + 1));  
	  }  
	  output = new String(sb);  
	  return output;  
	 }  
	  
	   
	   
	   
	   
	   
	   
	   
	 /** 
	  *       URLDecoder.encode(strEncoding)   
	  * @param String src           
	  *  
	  * @return  String           
	  */  
	   
	 public String getURLEncode(String src)  
	 {  
	  String requestValue="";  
	  try{  
	    
	  requestValue = URLEncoder.encode(src);  
	  }  
	  catch(Exception e){  
	    e.printStackTrace();  
	  }  
	    
	  return requestValue;  
	 }  
	   
	   
	   
	   
	   
	 /** 
	  * 3-DES   
	  * @param String src    3-DES   String 
	  * @param   String spkey   SPKEY 
	  * @return  String 3-DES    String 
	  */  
	   
	 public String get3DESEncrypt(String src,String spkey)  
	 {  
	  String requestValue="";  
	  try{  
	     
	    
	    //  3-DES      
	    byte[] enKey = getEnKey(spkey);  
	    //   3-DES        /"UTF-16LE/"     
	    byte[] src2 = src.getBytes("UTF-16LE");  
	    //  3-DES           
	    byte[] encryptedData = Encrypt(src2,enKey);   
	      
	     
	    //  3-DES        BASE64    
	    String base64String = getBase64Encode(encryptedData);  
	 //BASE64          
	    String base64Encrypt = filter(base64String);        
	      
	    // BASE64    HTML            
	    requestValue=getURLEncode(base64Encrypt);   
	    //System.out.println(requestValue);  
	  }  
	  catch(Exception e){  
	    e.printStackTrace();  
	  }  
	    
	  return requestValue;  
	 }  
	  
	   
	   
	 /** 
	  *       URLDecoder.decode(strEncoding)   
	  * @param String src           
	  *  
	  * @return  String           
	  */  
	   
	 public String getURLDecoderdecode(String src)  
	 {     
	  String requestValue="";  
	  try{  
	    
	  requestValue = URLDecoder.decode(src);  
	  }  
	  catch(Exception e){  
	    e.printStackTrace();  
	  }  
	    
	  return requestValue;  
	 }  
	   
	   
	   
	 /** 
	  *  
	  *  3-DES  （            ）。  
	  * @param byte[]  src    3-DES  byte[]  
	  * @param   String spkey   SPKEY 
	  * @return  String 3-DES    String 
	  */  
	 public String deCrypt(byte[] debase64,String spKey)  
	 {  
	  String strDe = null;  
	  Cipher cipher = null;   
	  try  
	  {  
	  cipher=Cipher.getInstance("DESede");  
	  byte[] key = getEnKey(spKey);   
	  DESedeKeySpec dks = new DESedeKeySpec(key);  
	  SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");  
	  SecretKey sKey = keyFactory.generateSecret(dks);  
	  cipher.init(Cipher.DECRYPT_MODE, sKey);   
	  byte ciphertext[] = cipher.doFinal(debase64);  
	  strDe = new String(ciphertext,"UTF-16LE");   
	  }  
	  catch(Exception ex)  
	  {  
	   strDe = "";  
	   ex.printStackTrace();  
	  }  
	  return strDe;  
	 }  
	  
	  
	   
	 /** 
	  * 3-DES   
	  * @param String src    3-DES   String 
	  * @param   String spkey   SPKEY 
	  * @return  String 3-DES    String 
	  */  
	   
	 public String get3DESDecrypt(String src,String spkey)  
	 {  
	  String requestValue="";  
	  try{  
	    //  3-DES      
	    //URLDecoder.decodeTML            
	    String URLValue=getURLDecoderdecode(src);      
	    //  3-DES        BASE64    
	      BASE64Decoder base64Decode = new BASE64Decoder();  
	byte[] base64DValue = base64Decode.decodeBuffer(URLValue);   
	      
	    //   3-DES        /"UTF-16LE/"     
	  
	requestValue = deCrypt(base64DValue,spkey);  
	  }  
	  catch(Exception e){  
	    e.printStackTrace();  
	  }  
	  return requestValue;  
	 }  
	  
	   
	   
	public static void main(String[] args) {  
   endecrypt test = new endecrypt();  
	String oldString = "       ";  
	String SPKEY = "www.itnnn.cn";  //        
	System.out.println("1。   SPKEY :  "+SPKEY);  
	System.out.println("2。    :  "+oldString);  
	String  reValue = test.get3DESEncrypt(oldString,SPKEY);  
	reValue = reValue.trim().intern();  
	System.out.println("  3-DES      : "+reValue);  
	String reValue2 = test.get3DESDecrypt(reValue,SPKEY);  
	System.out.println("  3-DES      : "+reValue2);  
	}  
}