Saturday, April 29, 2017

Checking Oracle Database Connection from Java

import java.sql.Connection;
import java.sql.Date;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class OracleSample {

    public static final String DBURL = "jdbc:oracl:thin:@***.***.***.***:1521:oracledatabase";
    public static final String DBUSER = "username";
    public static final String DBPASS = "Oracle8521";

    public static void main(String[] args) throws SQLException {
        // Load Oracle JDBC Driver
        DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
        // Connect to Oracle Database
        Connection con = DriverManager.getConnection(DBURL, DBUSER, DBPASS);

        Statement statement = con.createStatement();

        // Execute a SELECT query on Oracle Dummy DUAL Table. Useful for retrieving system values
        // Enables us to retrieve values as if querying from a table
        ResultSet rs = statement.executeQuery("SELECT SYSDATE FROM DUAL");
        if ( {
            Date currentDate = rs.getDate(1); // get first column returned
            System.out.println("Current Date from Oracle is : "+currentDate);

>># javac -cp "./ojdbc7.jar:."
>># java -cp "./ojdbc7.jar:." OracleSample
Current Date from Oracle is : 2017-02-09