How to encrypt and decrypt URl parameter in java?

How to encrypt and decrypt URl parameter in java without having the html characters like '/,&,=?'

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{

       开发者_如何转开发     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;
    }

}

My Code is as above and i am getting encrypted result:6puu4YjzScxHsv9tI/N92g==

In the above output due to backslash i am getting the error that i want to avoid.

Instead of

        byte[] utf8 = str.getBytes("UTF8");
        byte[] enc  = ecipher.doFinal(utf8);
        return new sun.misc.BASE64Encoder().encode(enc);

Use Apache Commons URL Safe 64 bit encoder to encode after encryption.

Base64.encodeBase64URLSafeString(enc);

To decode before descryption:

Base64.decodeBase64(dec)

Please Note this is ENCODER not encryptor. But the String is URL safe.

Ideally, you should always Encode your URL using URL Encoder which will ensure that special characters are encoded. So, even if you are having a URL with restricted characters, it will be safe.