title: How to encrypt and decrypt URl parameter in java?
body: <p>How to encrypt and decrypt URl parameter in java without having the html characters like '/,&amp;,=?'</p>
  
  <pre><code>import java.io.UnsupportedEncodingException;
  import java.security.spec.AlgorithmParameterSpec;
  import java.security.spec.KeySpec;
  
  import javax.crypto.Cipher;
  import javax.crypto.IllegalBlockSizeException;
  import javax.crypto.SecretKey;
  import javax.crypto.SecretKeyFactory;
  import javax.crypto.spec.PBEKeySpec;
  import javax.crypto.spec.PBEParameterSpec;
  
  public class DesEncrypter {
  
      Cipher ecipher;
      Cipher dcipher;
  
      byte[] salt =  {
              (byte)0xA9, (byte)0x9B, (byte)0xC8, (byte)0x32,
              (byte)0x56, (byte)0x35, (byte)0xE3, (byte)0x03
          };
  
      int iterationCount = 3;
  
      public DesEncrypter(String passPhrase) {
  
          try{
  
              KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
              SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
  
              ecipher = Cipher.getInstance(key.getAlgorithm());
              dcipher = Cipher.getInstance(key.getAlgorithm());
  
              AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
  
              ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
              dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
  
          } catch (java.security.InvalidAlgorithmParameterException e){
          } catch (java.security.spec.InvalidKeySpecException e){
          } catch (javax.crypto.NoSuchPaddingException e){
          } catch (java.security.NoSuchAlgorithmException e){
          } catch (java.security.InvalidKeyException e){
          }
      }
  
      public String encrypt(String str){
  
          try{
  
              byte[] utf8 = str.getBytes("UTF8");
              byte[] enc  = ecipher.doFinal(utf8);
  
              return new sun.misc.BASE64Encoder().encode(enc);
  
          } catch (javax.crypto.BadPaddingException e){
          } catch (IllegalBlockSizeException e){
          } catch (UnsupportedEncodingException e){
          }
  
          return null;
      }
  
      public String decrypt(String str){
  
          try{
  
              byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
              byte[] utf8 = dcipher.doFinal(dec);
  
              return new String(utf8,"UTF8");
  
          } catch (javax.crypto.BadPaddingException e){
          } catch (IllegalBlockSizeException e){
          } catch (UnsupportedEncodingException e){
          } catch (java.io.IOException e){
          }
  
          return null;
      }
  
  }
  </code></pre>
  
  <p>My Code is as above and i am getting encrypted result:6puu4YjzScxHsv9tI/N92g==<br>
  In the above output due to backslash i am getting the error that i want to avoid.</p>