How to create database connection and how to call it using Java

Question

Hi,
Good day! I'd like to know how I can create a db connection in JDev, then use this connection to retrieve data using a Java Class? I've seen using New Gallery > Database Connection. But I'm not sure how I can access this connection using Java and display some output from the retrieved records.
Any steps/tutorial link is appreciated.
Thanks in advance,
Rian

Answer 1

Hi,
If you need to access the connection in the entity object then refer http://download.oracle.com/docs/cd/E15523_01/web.1111/b31974/bcadvgen.htm#BABEIFAI i.e in MODEL.
But if you want to access connection in ViewController part of application then you need to do it manually.For this i am giving you my code for reference.------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.faces.context.FacesContext;
import oracle.jdbc.pool.OracleDataSource;
public class DataHandler {
String jdbcUrl = null;
String userid = null;
String password = null;
Connection conn;
public static final String CONNECTION_STRING =
FacesContext.getCurrentInstance().getExternalContext().getInitParameter("connectionString");
public static final String USER_NAME =
FacesContext.getCurrentInstance().getExternalContext().getInitParameter("userName");
public static final String PASSWORD =
FacesContext.getCurrentInstance().getExternalContext().getInitParameter("password");
public DataHandler(String jdbcUrl, String userid, String password,
boolean shouldConnect) throws SQLException {
this.jdbcUrl = jdbcUrl;
this.userid = userid;
this.password = password;
if (shouldConnect) {
connect();
public void connect() throws SQLException {
OracleDataSource ds;
ds = new OracleDataSource();
ds.setURL(jdbcUrl);
conn = ds.getConnection(userid, password);
public Connection getConnection() {
return conn;
public ResultSet executeQuery(String sql) throws SQLException {
Statement s = conn.createStatement();
return s.executeQuery(sql);
public void closeConnection() throws SQLException {
if (!conn.isClosed()) {
conn.close();
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------