import javax.annotation.Resource;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.sql.DataSource;
@WebServlet("/example")
public class ExampleServlet extends HttpServlet {
@Resource(lookup = "java:comp/env/jdbc/myDataSource")
private DataSource dataSource;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// ...
}
}
