DES解码报错:javax.crypto.BadPaddingException: Given final block not properly padded

在进行Des解码时，出现异常，出错原因是

 1对3DES加密报文进行Base64编码，
 2然后转为String传输，
 3接收到的Sring转为byte[]，
 4先进性Base64解码，（缺少这一步）
 5再进行3DES解码，

改正为：

 1对3DES加密报文进行Base64编码，
 2然后转为String传输，
 3接收到的Sring转为byte[]，
 4先进行Base64解码，
 5再进行3DES解码，

在进行3DES加密时当最后一位不足64时会自动补上，导致解密时报错

javax.crypto.BadPaddingException: Given final block not properly padded
	at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:989)
	at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:845)
	at com.sun.crypto.provider.DESCipher.engineDoFinal(DESCipher.java:314)
	at javax.crypto.Cipher.doFinal(Cipher.java:2165)

贴出原工具类DesUtils

import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.SecureRandom;

/**
 * @author 
 * @date 2019/07/23
 */
public class DesUtils {

    private final static Logger logger = LoggerFactory.getLogger(DesUtils.class);

    /**
     * 加密
     *
     * @param str byte[]
     * @param password   String
     * @return byte[]
     */
    public static String encrypt(String password, String str)  {

        try {
            byte[] datasource = str.getBytes("UTF-8");
            SecureRandom random = new SecureRandom();
            DESKeySpec desKey = new DESKeySpec(password.getBytes());
            //创建一个密匙工厂，然后用它把DESKeySpec转换成
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey securekey = keyFactory.generateSecret(desKey);
            //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,ENCRYPT_MODE用于将 Cipher 初始化为加密模式的常量
            cipher.init(Cipher.ENCRYPT_MODE, securekey, random);
            //现在，获取数据并加密 正式执行加密操作
            //按单部分操作加密或解密数据，或者结束一个多部分操作
            byte[] bytes = cipher.doFinal(datasource);
            String result = Base64.encodeBase64String(bytes);
            return result;
        } catch (Throwable e) {
            logger.error("DES 加密异常，详情：" + e.toString());
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 解密
     *
     * @param datasource      byte[]
     * @param password String
     * @return byte[]
     * @throws Exception
     */
    public static String decrypt(String password,String encryptResult) throws Exception {
//        byte[] strbytes = Base64.decodeBase64(encryptResult);
        byte[] strbytes = encryptResult.getBytes();
//        byte[] src = datas.getBytes();
        // DES算法要求有一个可信任的随机数源
        SecureRandom random = new SecureRandom();
        // 创建一个DESKeySpec对象
        DESKeySpec desKey = new DESKeySpec(password.getBytes());
        // 创建一个密匙工厂
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");//返回实现指定转换的 Cipher 对象
        // 将DESKeySpec对象转换成SecretKey对象
        SecretKey securekey = keyFactory.generateSecret(desKey);
        // 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, securekey, random);
        // 真正开始解密操作
        byte[] bytes = cipher.doFinal(strbytes);
        String result = new String(bytes);
//        String result = Base64.encodeBase64String(bytes);
        return result;
    }
}

贴出使用的测试

    @Test
    public void test07(){
        Timestamp d = new Timestamp(System.currentTimeMillis());
        long dateTime = d.getDateTime();
        //待加密内容
        String str = dateTime + "," + "15555987064"+"," + "/member/bill-history";
        System.out.println("原文："+str);
        //密码，长度要是8的倍数
        String password = "1234567887654321";
        String encryptResult = DesUtils.encrypt(password, str);
        System.out.println("加密后："+ encryptResult);
        //直接将如上内容解密
        try {
            String decryResult = DesUtils.decrypt(password, encryptResult);
            System.out.println("解密后："+decryResult);
        } catch (Exception e1) {
            e1.printStackTrace();
        }
        String url = "http://190.58.81.67/web-api/page/wid/account/wechat/login?token="+encryptResult+"&lang=zh_TW";
        System.out.println("===request url =="+ url);
        String results = HttpClientUtils.doGet(url);
        System.out.println("===response==="+results);

    }