How to connect UCanAccess to an Access database encrypted with a database password?

Question

I've developed a Java application (a dictionary) with an Access database to store the words of the dictionary and I'm getting ready to distribute it. I want to encrypt my database with a password to prevent people to access my words. When I set a passwords the Java code shows this Exception

net.ucanaccess.jdbc.UcanaccessSQLException: Decoding not supported.  Please choose a CodecProvider which supports reading the current database encoding.
at net.ucanaccess.jdbc.UcanaccessDriver.connect(UcanaccessDriver.java:247)

Here is my connection code before encryption of my database with password ....

String s1="jdbc:ucanaccess://";
String user="";
String pass="";
String s4="words.accdb";

public void connectToDB(){
        //database connection
        try {
            conn = DriverManager.getConnection(s1+s4,user,pass);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        //end of database connection
    }

Here is the code after the encryption with password for example 12345...

String s1="jdbc:ucanaccess://";
String user="";
String pass="12345";
String s4="words.accdb";

public void connectToDB(){
        //database connection
        try {
            conn = DriverManager.getConnection(s1+s4,user,pass);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        //end of database connection
    }

Answer 1

Steps of How to connect UCanAccess to an Access database encrypted with a database password

Step 1:
Add these two packages to your project (jackcess-encrypt.jar, bcprov-ext-jdk15on-152)

You can download the two packages from the following links:

Jackcess Encrypt
Bouncy Castle

Step 2:
You have to add this class to your project folder

import java.io.File;
import java.io.IOException;
import net.ucanaccess.jdbc.JackcessOpenerInterface;
import com.healthmarketscience.jackcess.CryptCodecProvider;
import com.healthmarketscience.jackcess.Database;
import com.healthmarketscience.jackcess.DatabaseBuilder;

public class CryptCodecOpener implements JackcessOpenerInterface {
         @Override
    public Database open(File fl,String pwd) throws IOException {
       DatabaseBuilder dbd =new DatabaseBuilder(fl);
       dbd.setAutoSync(false);
       dbd.setCodecProvider(new CryptCodecProvider(pwd));
       dbd.setReadOnly(false);
       return dbd.open();
    }
  //Notice that the parameter setting autosync =true is recommended with UCanAccess for performance reasons. 
  //UCanAccess flushes the updates to disk at transaction end. 
  //For more details about autosync parameter (and related tradeoff), see the Jackcess documentation. 
}

like this

step 3:
use the following connection code

public void connectToDB(){
            try {
                conn = DriverManager.getConnection("jdbc:ucanaccess://words.accdb;jackcessOpener=CryptCodecOpener", "user", "pass");
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
    }

You can also watch this video...https://www.youtube.com/watch?v=TT6MgBBkRSE