错误[stderr]（EJB缺省-8）java.lang.ClassNotFoundException：org.sqlite.JDBC

Question

I'm trying to make a connection with sqlite database in j2ee project, but i keep getting this error "ERROR [stderr] (EJB default -8)java.lang.ClassNotFoundException: org.sqlite.JDBC". Knowing that I test the method in java program and that's work fine. I have one connection class in ejb project(session bean)there is the code here.

public Connection getConnection(){
    Connection connection= null;


    try {
        Class.forName("org.sqlite.JDBC");
        String dataFolder = System.getProperty("user.home") + "\\AppData\\Local";
        String b = System.getProperty("user.home") ;



        String file = b + "\\Desktop\\file";
        connection = DriverManager.getConnection("jdbc:sqlite:"+ file );
       System.out.println("Connection completed.");
    } catch (Exception e) {
        e.printStackTrace();
    }

    return connection;
 }

then I test it with junit test in java project but everytime i get the same error :java.Lang.ClassNotFoundException: org.sqlite.JDBC PS: I have incuded sqlite.jar like this (right click on the project->configure build path-> library-> add external jar) but always facing the same error

Answer 1

I have fixed the problem:

1. Added SQLite jar file in this path:

   D:\\jboss-as-7.1.1.Final\\modules\\javax\\activation\\api\\main

2. In JBoss Server Runtime > Deployments > Manage Deployments added SQLite jar file an then enable it.

Answer 2

Assuming that you have the following project structure:

src/main/java
     |
      - MyConnection.java
src/test/java
     |
      - MyConnectionTest.java

With the following elements:

Base class MyConnection

public class MyConnection {

    public Connection getConnection() {
        Connection connection = null;

        try {
            Class.forName("org.sqlite.JDBC");
            connection = DriverManager.getConnection("jdbc:sqlite:");
            System.out.println("Connection completed.");
        } catch (Exception e) {
            e.printStackTrace();
        }

        return connection;
    }
}

Test class MyConnectionTest

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.sql.Connection;
import java.sql.SQLException;

import org.junit.Test;

public class MyConnectionTest {

    @Test
    public void isValid() throws SQLException {
        MyConnection myConn = new MyConnection();
        Connection conn = myConn.getConnection();
        assertTrue(conn.isValid(0));
        conn.close();
        assertFalse(conn.isValid(0));
    }
}

In your Eclipse project you just need to do the following:

1. Right click on your project;
2. Navigate to Build Path and select the option Configure Build Path... ;
3. On your right side menu, press Add Library , select JUnit (JUnit4) and click Finish ;
4. Finally, on the Configure Build Path... menu, select the option Add External JARs... , browse to the location where your SQLite JDBC jar file is, select it and click on Apply .
5. Go to your MyConnectionTest test class and run it as a JUnit test.