Java USES DES to encrypt and decrypt instances

In the front of the use of some encryption and decryption classes, here together to do a simple test, the code is as follows:

MainActivity:

package com.home.testdes;
import android.os.Bundle;
import android.util.Log;
import android.app.Activity;
public class MainActivity extends Activity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  DESUtil u = new DESUtil();
  String mi = u.getEnc("I love you");
  Log.i(" encrypted ", mi);
  String ming = u.getDec(mi);
  Log.i(" decrypted ", ming);
 }
}

Encryption and decryption tools:

package com.home.testdes;
import java.security.Key;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
import android.util.Base64;

public class DESUtil {
 private Key key;//The key value of the key
 private byte[] DESkey;
 private byte[] DESIV = { 0x12, 0x34, 0x56, 0x78, (byte) 0x90, (byte) 0xAB,
   (byte) 0xCD, (byte) 0xEF };
 private AlgorithmParameterSpec iv = null;//Parameter interface of encryption algorithm
 public DESUtil() {
  try {
   this.DESkey = "abcdefghijk".getBytes("UTF-8");//Set the key
   DESKeySpec keySpec = new DESKeySpec(DESkey);//Set the key parameter 
   iv = new IvParameterSpec(DESIV);//Set the vector
   SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");//Acquire key factory
   key = keyFactory.generateSecret(keySpec);//Get the key object
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
 
 public String getEnc(String inputString) {
  byte[] byteMi = null;
  byte[] byteMing = null;
  String outputString = "";
  try {
   byteMing = inputString.getBytes("UTF-8");
   byteMi = this.getEncCode(byteMing);
   byte[] temp = Base64.encode(byteMi, Base64.DEFAULT);
   outputString = new String(temp);
  } catch (Exception e) {
  } finally {
   byteMing = null;
   byteMi = null;
  }
  return outputString;
 }
 
 public String getDec(String inputString) {
  byte[] byteMing = null;
  byte[] byteMi = null;
  String strMing = "";
  try {
   byteMi = Base64.decode(inputString.getBytes(), Base64.DEFAULT);
   byteMing = this.getDesCode(byteMi);
   strMing = new String(byteMing, "UTF8");
  } catch (Exception e) {
  } finally {
   byteMing = null;
   byteMi = null;
  }
  return strMing;
 }
 
 private byte[] getEncCode(byte[] bt) {
  byte[] byteFina = null;
  Cipher cipher;
  try {
   //Get the Cipher instance
   cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
   cipher.init(Cipher.ENCRYPT_MODE, key, iv);
   byteFina = cipher.doFinal(bt);
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   cipher = null;
  }
  return byteFina;
 }
 
 private byte[] getDesCode(byte[] bt) {
  Cipher cipher;
  byte[] byteFina = null;
  try {
   //Get the Cipher instance
   cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
   cipher.init(Cipher.DECRYPT_MODE, key, iv);
   byteFina = cipher.doFinal(bt);
  } catch (Exception e) {
   e.printStackTrace();
  } finally {
   cipher = null;
  }
  return byteFina;
 }
}