工具类-EncodeUtil

  package com.specl.utils;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;

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

import org.apache.commons.codec.binary.Base64;

/**
 * 封装 DES加密 /Base64编码的工具类
 * @author yulianyu
 *
 */
public class EncodeUtil {
	private static byte rawKeyData[] = null;

	static {
		/*SecureRandom sr;
		try {
			sr = new SecureRandom("qt".getBytes("utf-8"));
		} catch (UnsupportedEncodingException e) {
			sr = new SecureRandom("qt".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");
		} catch (NoSuchAlgorithmException e) {
		}
		kg.init(sr);
		// 生成密匙
		SecretKey key = kg.generateKey();
		rawKeyData = key.getEncoded();
		// 获取密匙数据
		*/rawKeyData = HEXStringToByte("7ca4f7ceb3e91016");

	}

	/**
	 * 传入字符串，返回一个加密串
	 * @param s
	 * @return
	 */
	public static String encode(String s) {
		try {
			byte[] encryptedData = encrypt(s);
			s = byteToHEXString(encryptedData);
		} catch (Exception e) {
		}
		return s;
	}

	/**
	 * 传入数字，返回一个加密串
	 * @param s
	 * @return
	 */
	public static String encode(long goodsId) {
		try {
			byte[] encryptedData = encrypt("" + goodsId);
			return byteToHEXString(encryptedData);
		} catch (Exception e) {
		}
		return "";
	}

	/**
	 * 传入加密串，返回解密串
	 * @param s
	 * @return
	 */
	public static String decode(String s) {
		try {
			return decrypt(HEXStringToByte(s));
		} catch (Exception e) {
		}
		return s;
	}

	/**
	 * 传入字符串，返回一个加密串
	 * @param s
	 * @return
	 */
	public static String encodeBase64(String s) {
		byte[] binaryData = null;
		try {
			binaryData = s.getBytes("utf-8");
		} catch (UnsupportedEncodingException e) {
			return s;
		}
		//		byte[] newbt = Base64.encodeBase64(binaryData);

		return encodeBase64(binaryData);//new String(newbt);
	}

	public static String encodeBase64(byte[] binaryData) {
		byte[] newbt = Base64.encodeBase64(binaryData);

		return new String(newbt);
	}

	public static byte[] enBase64(byte[] binaryData) {
		return Base64.encodeBase64(binaryData);
	}

	public static byte[] deBase64(byte[] bytes) throws IOException {
		return Base64.decodeBase64(bytes);
	}

	public static String stringEncode(String str){
		return java.net.URLEncoder.encode(str);
	}
	/**
	 * 传入加密串，返回解密串
	 * @param s
	 * @return
	 */
	public static String decodeBase64(String s) {
		try {
			return decodeBase64(s.getBytes("utf-8"));
		} catch (UnsupportedEncodingException e) {
			return s;
		}
	}

	public static String decodeBase64(byte[] bytes) {
		byte[] oldbt = null;
		String t = null;
		try {
			oldbt = Base64.decodeBase64(bytes);
			t = new String(oldbt, "utf-8");
		} catch (UnsupportedEncodingException e) {
		}
		return t;
	}

	public static String byteToHEXString(byte[] bArray) {
		StringBuilder sb = new StringBuilder(100);
		for (int i = 0; i < bArray.length; i++) {
			String hex = Integer.toHexString(bArray[i] & 0xff);
			if (hex.length() == 1) {
				sb.append("0").append(hex);
			} else {
				sb.append(hex);
			}
		}
		return sb.toString().toUpperCase();
	}

	public static byte[] HEXStringToByte(String strString) {
		byte[] ret = new byte[strString.length() / 2];
		for (int i = 0; i < ret.length; i++) {
			ret[i] = Integer.decode("#" + strString.substring(2 * i, 2 * i + 2)).byteValue();
		}
		return ret;
	}

	/**
	* 加密方法
	*
	* @param rawKeyData
	* @param str
	* @return
	* @throws InvalidKeyException
	* @throws NoSuchAlgorithmException
	* @throws IllegalBlockSizeException
	* @throws BadPaddingException
	* @throws NoSuchPaddingException
	* @throws InvalidKeySpecException
	 * @throws UnsupportedEncodingException 
	*/
	public static byte[] encrypt(String str) throws InvalidKeyException, NoSuchAlgorithmException,
			IllegalBlockSizeException, BadPaddingException, NoSuchPaddingException, InvalidKeySpecException,
			UnsupportedEncodingException {
		// DES算法要求有一个可信任的随机数源
		//		SecureRandom sr = new SecureRandom();
		// 从原始密匙数据创建一个DESKeySpec对象
		DESKeySpec dks = new DESKeySpec(rawKeyData);
		// 创建一个密匙工厂，然后用它把DESKeySpec转换成一个SecretKey对象
		SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
		SecretKey key = keyFactory.generateSecret(dks);
		// Cipher对象实际完成加密操作
		Cipher cipher = Cipher.getInstance("DES");
		// 用密匙初始化Cipher对象
		cipher.init(Cipher.ENCRYPT_MODE, key);
		// 现在，获取数据并加密
		byte data[] = str.getBytes("utf-8");
		// 正式执行加密操作
		byte[] encryptedData = cipher.doFinal(data);

		return encryptedData;
	}

	/**
	* 解密方法
	*
	* @param rawKeyData
	* @param encryptedData
	* @throws IllegalBlockSizeException
	* @throws BadPaddingException
	* @throws InvalidKeyException
	* @throws NoSuchAlgorithmException
	* @throws NoSuchPaddingException
	* @throws InvalidKeySpecException
	 * @throws UnsupportedEncodingException 
	*/
	public static String decrypt(byte[] encryptedData) throws IllegalBlockSizeException, BadPaddingException,
			InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeySpecException,
			UnsupportedEncodingException {
		// DES算法要求有一个可信任的随机数源
		//		SecureRandom sr = new SecureRandom();
		// 从原始密匙数据创建一个DESKeySpec对象
		DESKeySpec dks = new DESKeySpec(rawKeyData);
		// 创建一个密匙工厂，然后用它把DESKeySpec对象转换成一个SecretKey对象
		SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
		SecretKey key = keyFactory.generateSecret(dks);
		// Cipher对象实际完成解密操作
		Cipher cipher = Cipher.getInstance("DES");
		// 用密匙初始化Cipher对象
		cipher.init(Cipher.DECRYPT_MODE, key);
		// 正式执行解密操作
		byte decryptedData[] = cipher.doFinal(encryptedData);
		return new String(decryptedData, "utf-8");
	}

	
	public String getCurrentMillyTime(){
	    return Long.valueOf(System.currentTimeMillis()).toString();
	}
}