org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at line 16

13: <jsp:useBean id="dbConn" scope="request" class="com.db.DefaultConnection"/>
14:
15: <%
16:   Connection conn=dbConn.getDBConnection();
17:   Statement stmt = conn.createStatement();
18:   ResultSet rs = stmt.executeQuery("SELECT * FROM public.Test");
19: %>


Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:583)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

public class DefaultConnection {
    public Connection getDBConnection() throws Exception{
        Connection conn = null;
        Class.forName("org.postgresql.Driver");

        String sURL="jdbc:postgresql://localhost:5432/deneme";
        String sUserName="postgres";
        String sPwd="maxpayne23";
        try{
            conn = DriverManager.getConnection(sURL,sUserName,sPwd);
            System.out.println("Veritabanına bağlanıldı.");
        }catch (Exception ex)
        {
            System.out.println("Bağlantı Kurulamadı");
            System.exit(0);
        }

        return conn;
    }
}