I used IntelliJ IDEA 14.0, Tomcat server and h2 database to create simple Web App. Unfortunately when I run the application I receive message for exception
java.lang.ClassNotFoundException: org.h2.Driver
I stored h2 jar file in folder with name "db" and set "Add as library" function. I connect to the DB like this:
public class DBConn {
private static final String DRIVER = "org.h2.Driver";
private static final String URL = "jdbc:h2:tcp://localhost/~/BigPicture";
private static final String USERNAME = "doncho";
private static final String PASS = "";
private static DBConn instance;
private static Connection conn;
private DBConn(){
}
public static DBConn getInstance(){
if(instance == null){
instance = new DBConn();
}
return instance;
}
public Connection getConnectivity(){
try {
Conn();
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
private void Conn() throws SQLException{
if(conn == null){
try {
Class.forName(DRIVER);
} catch (ClassNotFoundException e) {
System.out.println("No Driver Found");
e.printStackTrace();
}
DriverManager.getConnection(URL, USERNAME, PASS);
}
}
public void Disconnect(){
if(conn != null){
try {
conn.close();
conn = null;
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
And I call database in Servlet.
public class DBServlet extends HttpServlet {
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Connection conn = DBConn.getInstance().getConnectivity();
System.out.println("It Work's");
DBConn.getInstance().Disconnect();
}
The Output says "No Driver Found" and throws java.lang.ClassNotFoundException: org.h2.Driver.
It's importand to say, that when I call class DBConn
() in Main
method IntelliJ fInd h2
driver, but Tomcat still can't.
Please help because I'm new in IntelliJ and in Eclipse this app work, but I want to use IntelliJ for my projects.
Best regards.
将驱动程序的jar文件放在$ TOMCAT_HOME / lib或yourapp / WEB-INF / lib上
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.