DES加密+Base64转换

package httpVisit.action;
 
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
 
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
 
/**
 * @author：Heweipo
 * @version 1.00
 * 
 */
public class DesCoderUtil {
 
    private static byte[] keys = { 1, -1, 1, -1, 1, -1, 1, -1 };
 
    private static String key = "leagsoft";
 
    public static String getKey() {
        return key;
    }
 
    public static void setKey(String key) {
        DesCoderUtil.key = key;
    }
 
    /**
     * 
     * <p>
     * 对password进行MD5加密
     * @param source
     * @return 
     * @return byte[]    
     * author: Heweipo
     */
    public static byte[] getMD5(byte[] source) {
        byte tmp[] = null;
        try {
            java.security.MessageDigest md = java.security.MessageDigest
                    .getInstance("MD5");
            md.update(source);
            tmp = md.digest();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return tmp;
    }
 
    /**
     * 
     * <p>
     * 采用JDK内置类进行真正的加密操作
     * @param byteS
     * @param password
     * @return 
     * @return byte[]    
     * author: Heweipo
     */
    private static byte[] encryptByte(byte[] byteS, byte password[]) {
        byte[] byteFina = null;
        try {// 初始化加密/解密工具
            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
            DESKeySpec desKeySpec = new DESKeySpec(password);
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
            IvParameterSpec iv = new IvParameterSpec(keys);
            cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
            byteFina = cipher.doFinal(byteS);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        return byteFina;
    }
 
    /**
     * 
     * <p>
     * 采用JDK对应的内置类进行解密操作
     * @param byteS
     * @param password
     * @return 
     * @return byte[]    
     * author: Heweipo
     */
    private static byte[] decryptByte(byte[] byteS, byte password[]) {
        byte[] byteFina = null;
        try {// 初始化加密/解密工具
            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
            DESKeySpec desKeySpec = new DESKeySpec(password);
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
            IvParameterSpec iv = new IvParameterSpec(keys);
            cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
            byteFina = cipher.doFinal(byteS);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        return byteFina;
    }
 
    /**
     * 
     * <p>
     * Des加密strMing，然后base64转换
     * @param strMing
     * @param md5key
     * @return 
     * @return String    
     * author: Heweipo
     */
    public static String encryptStr(String strMing, byte md5key[]) {
        byte[] byteMi = null;
        byte[] byteMing = null;
        String strMi = "";
        try {
            byteMing = strMing.getBytes("utf-8");
            byteMi = encryptByte(byteMing, md5key);
            BASE64Encoder base64Encoder = new BASE64Encoder();
            strMi = base64Encoder.encode(byteMi);
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            byteMing = null;
            byteMi = null;
        }
        return strMi;
    }
 
    /**
     * 
     * <p>
     * Base64转换strMi,然后进行des解密
     * @param strMi
     * @param md5key
     * @return 
     * @return String    
     * author: Heweipo
     */
    public static String decryptStr(String strMi, byte md5key[]) {
        byte[] byteMing = null;
        String strMing = "";
        try {
            BASE64Decoder decoder = new BASE64Decoder();
            byteMing = decoder.decodeBuffer(strMi);
            byteMing = decryptByte(byteMing, md5key);
            strMing = new String(byteMing);
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            byteMing = null;
        }
        return strMing;
    }
     
    public static void main(String[] args) {
         
        String[] keys = {"leagsoft","leagsoftpo","leagsoftiu","leagsoftyy","leagsoftew","leagsoftmm"};
        for(String key : keys){
            String data = "我是learn_more，who are you?";
            try{
                System.out.println(DesCoderUtil.encryptStr(data, DesCoderUtil.getMD5(key.getBytes("utf-8"))));
                System.out.println("--------------");
                System.out.println(DesCoderUtil.decryptStr(DesCoderUtil.encryptStr(data, DesCoderUtil.getMD5(key.getBytes("utf-8"))), 
                        DesCoderUtil.getMD5(key.getBytes("utf-8"))));
            }catch(Exception e){
                e.printStackTrace();
            }
        }
    }
 
}