DES java源代码如下：

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class DESEncryptTest {
private static final String DES_ALGORITHM = "DES";
		
	/**
	 * DES加密
	 * @param plainData
	 * @param secretKey
	 * @return
	 * @throws Exception
	 */
	public String encryption(String plainData, String secretKey) throws Exception{

		Cipher cipher = null;
		try {
			cipher = Cipher.getInstance(DES_ALGORITHM);
			cipher.init(Cipher.ENCRYPT_MODE, generateKey(secretKey));
			
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (NoSuchPaddingException e) {
			e.printStackTrace();
		}catch(InvalidKeyException e){
			
		}
		
		try {
			// 为了防止解密时报javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher异常，
			// 不能把加密后的字节数组直接转换成字符串
			byte[] buf = cipher.doFinal(plainData.getBytes());
			
			return Base64Utils.encode(buf);
			
		} catch (IllegalBlockSizeException e) {
			e.printStackTrace();
			throw new Exception("IllegalBlockSizeException", e);
		} catch (BadPaddingException e) {
			e.printStackTrace();
			throw new Exception("BadPaddingException", e);
		}
	    
	}

	/**
	 * DES解密
	 * @param secretData
	 * @param secretKey
	 * @return
	 * @throws Exception
	 */
	public String decryption(String secretData, String secretKey) throws Exception{
		
		Cipher cipher = null;
		try {
			cipher = Cipher.getInstance(DES_ALGORITHM);
			cipher.init(Cipher.DECRYPT_MODE, generateKey(secretKey));
			
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
			throw new Exception("NoSuchAlgorithmException", e);
		} catch (NoSuchPaddingException e) {
			e.printStackTrace();
			throw new Exception("NoSuchPaddingException", e);
		}catch(InvalidKeyException e){
			e.printStackTrace();
			throw new Exception("InvalidKeyException", e);
			
		}
		
		try {
			
			byte[] buf = cipher.doFinal(Base64Utils.decode(secretData.toCharArray()));
			
			return new String(buf);
			
		} catch (IllegalBlockSizeException e) {
			e.printStackTrace();
			throw new Exception("IllegalBlockSizeException", e);
		} catch (BadPaddingException e) {
			e.printStackTrace();
			throw new Exception("BadPaddingException", e);
		}
	}
	
	
	/**
	 * 获得秘密密钥
	 * 
	 * @param secretKey
	 * @return
	 * @throws NoSuchAlgorithmException 
	 */
	private SecretKey generateKey(String secretKey) throws NoSuchAlgorithmException{
		SecureRandom secureRandom = new SecureRandom(secretKey.getBytes());
				
		// 为我们选择的DES算法生成一个KeyGenerator对象
		KeyGenerator kg = null;
		try {
			kg = KeyGenerator.getInstance(DES_ALGORITHM);
		} catch (NoSuchAlgorithmException e) {
		}
		kg.init(secureRandom);
		//kg.init(56, secureRandom);
		
		// 生成密钥
		return kg.generateKey();
	}
			
	public static void main(String[] a) throws Exception{
		String input = "cy11Xlbrmzyh:604:301:1353064296";
		String key = "37d5aed075525d4fa0fe635231cba447";
		
		DESEncryptTest des = new DESEncryptTest();
		
		String result = des.encryption(input, key);
		System.out.println(result);
		
		System.out.println(des.decryption(result, key));
			
	}
		
	static class Base64Utils {

		static private char[] alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=".toCharArray();
		static private byte[] codes = new byte[256];
		static {
			for (int i = 0; i < 256; i++)
				codes[i] = -1;
			for