DES加密解密代码

package client;

import java.security.Key;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.annotation.adapters.HexBinaryAdapter;

import org.apache.commons.codec.binary.Hex;

public class DES {
	//DES加密秘钥
	public static final byte[] Key = new byte[]{11, 13, 23, 32, 12, 32, 12, 45};
	
	/**
	 * DES加密方法
	 * @param src 传入参数值
	 * @return
	 */
	public static String encrypt(String src) {
		try {
		// 生成密钥字符串

		String encodeHexString = Hex.encodeHexString(Key);

		// 再把我们的字符串转变为字节数组，可以用于另一方使用，验证

		byte[] decodeHex = Hex.decodeHex(encodeHexString.toCharArray());

		// 生成密钥对象

		SecretKeySpec secretKeySpec = new SecretKeySpec(decodeHex, "DES");

		// 获取加解密实例

		Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");

		// 初始化加密模式

		cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);

		// 加密

		byte[] doFinal = cipher.doFinal(src.getBytes());

		return new HexBinaryAdapter().marshal(doFinal);
		} catch (Exception e) {
		e.printStackTrace();

		}
		return null;

		}
	/**
     * 根据指定的密钥及算法，将字符串进行解密。
     *
     * @param data      要进行解密的数据
     * @param key       密钥
     * @param algorithm 算法
     * @return 解密后的结果
     * @throws Exception
     */
    public static String decrypt(String data, Key key, String algorithm)
            throws Exception {
        Cipher cipher = Cipher.getInstance(algorithm);
        cipher.init(Cipher.DECRYPT_MODE, key);
        String result = new String(cipher.doFinal(StringUtils
                .hexStringToByteArray(data)), "utf8");
        return result;
    }
    /**
     * 返回可逆算法DES的密钥
     *
     * @param key 前8字节将被用来生成密钥。
     * @return 生成的密钥
     * @throws Exception
     */
    public static Key getDESKey(byte[] key) throws Exception {
        DESKeySpec des = new DESKeySpec( key );
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance( "DES" );
        return keyFactory.generateSecret( des );
    }
    
    public static void main(String[] args) throws Exception {
    	String b = DES.encrypt("123asda");
    	System.out.println(b);
    	String pwd = DES.decrypt(b, getDESKey(Key), "DES");
    	System.out.println(pwd);
	}

}