DES对字符串的加密问题

我在开发中需要对字符串进行DES加密
在本机上测试时对任何字符串加密解密都没有问题
但是一旦使用了Soket网络传输以后解密出现问题，是密文长度不够造成的
我的加密解密程序如下：
public class DesEncrypt {
Key key;

/**
* 根据参数生成KEY
* @param strKey
*/
public void getKey(String strKey) {
try {
KeyGenerator _generator = KeyGenerator.getInstance("DES");
_generator.init(new SecureRandom(strKey.getBytes()));
this.key = _generator.generateKey();
_generator = null;
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 加密String明文输入,String密文输出
* @param strMing
* @return
*/
public String getEncString(String strMing) {
byte[] byteMi = null;
byte[] byteMing = null;
String strMi = "";
Base64 base64en = new Base64();
try {
byteMing = strMing.getBytes("UTF-8");
byteMi = this.getEncCode(byteMing);
strMi = base64en.encode(byteMi);

} catch (Exception e) {
e.printStackTrace();
} finally {
base64en = null;
byteMing = null;
byteMi = null;
}
return strMi;
}

/**
* 解密 以String密文输入,String明文输出
* @param strMi
* @return
*/
public String getDesString(String strMi) {
Base64 base64De = new Base64();
byte[] byteMing = null;
byte[] byteMi = null;
String strMing = "";
try {
byteMi=base64De.decode(strMi);
byteMing = this.getDesCode(byteMi);
strMing = new String(byteMing, "UTF-8");
} catch (Exception e) {
e.printStackTrace();
} finally {
base64De = null;
byteMing = null;
byteMi = null;
}
return strMing;
}

/**
* 加密以byte[]明文输入,byte[]密文输出
* @param byteS
* @return
*/
private byte[] getEncCode(byte[] byteS) {
byte[] byteFina = null;
Cipher cipher;
try {
cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, key);
byteFina = cipher.doFinal(byteS);
} catch (Exception e) {
e.printStackTrace();
} finally {
cipher = null;
}
return byteFina;
}

/**
* 解密以byte[]密文输入,以byte[]明文输出
* @param byteD
* @return
*/
private byte[] getDesCode(byte[] byteD) {
Cipher cipher;
byte[] byteFina = null;
try {
cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, key);
byteFina = cipher.doFinal(byteD);
} catch (Exception e) {
e.printStackTrace();
} finally {
cipher = null;
}
return byteFina;
}

public static void main(String args[]) {
DesEncrypt des=new DesEncrypt();//实例化一个对像
des.getKey("asdefd");//生成密匙

String strEnc = des.getEncString("ceshi测试");//加密字符串,返回String的密文
System.out.println("加密文:"+strEnc);
String strDes = des.getDesString(strEnc);//把String 类型的密文解密
System.out.println("解密文:"+strDes);
}

大家帮忙看看 很急的问题