3DES加解签

import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import java.io.UnsupportedEncodingException;
import java.security.Key;

public class ThreeDES {

    private static final String IV = "1234567-";
    private final static String encoding = "utf-8" ;
    /**
     * DESCBC加密
     *
     * @param src
     *            数据源
     * @param key
     *            密钥
     * @return 返回加密后的数据
     * @throws Exception
     */
    public static String encryptDESCBC(final String src, final String key) throws Exception {

        Key deskey = null ;
        DESedeKeySpec spec = new DESedeKeySpec(key.getBytes());
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" );
        deskey = keyfactory.generateSecret(spec);    
         
        Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" );
        IvParameterSpec ips = new IvParameterSpec(IV.getBytes());
        cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
        byte [] encryptData = cipher.doFinal(src.getBytes(encoding));    
        return Base64.encodeBase64URLSafeString(encryptData);
    }

    /**
     * DESCBC解密
     *
     * @param src
     *            数据源
     * @param key
     *            密钥
     * @return 返回解密后的原始数据
     * @throws Exception
     */
    public static String decryptDESCBC(final String src, final String key) throws Exception {
         Key deskey = null ;
         DESedeKeySpec spec = new DESedeKeySpec(key.getBytes());
         SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" );
         deskey = keyfactory.generateSecret(spec);    
         Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" );
         IvParameterSpec ips = new IvParameterSpec(IV.getBytes());
         cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
          
         byte [] decryptData = cipher.doFinal(Base64.decodeBase64(src));
          
         return new String(decryptData, encoding);
    }
    
    public static String padding(String str) {
        byte[] oldByteArray;  
        try {  
            oldByteArray = str.getBytes("UTF8");  
            int numberToPad = 8 - oldByteArray.length % 8;  
            byte[] newByteArray = new byte[oldByteArray.length + numberToPad];  
            System.arraycopy(oldByteArray, 0, newByteArray, 0,
                    oldByteArray.length);  
            for (int i = oldByteArray.length; i < newByteArray.length; ++i) {  
                newByteArray[i] = 0;  
            }  
            return new String(newByteArray, "UTF8");
        } catch (UnsupportedEncodingException e) {
            System.out.println("Crypter.padding UnsupportedEncodingException");
        }  
        return null;  
    } 

}