Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.sql.Clob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Timestamp;

public class Main {

    public static void main(String[] args) throws Exception {
        Connection conn = getOracleConnection();
        String[] columnNames = { "id", "name", "content", "date_created" };
        Object[] inputValues = new Object[columnNames.length];
        inputValues[0] = new java.math.BigDecimal(100);
        inputValues[1] = new String("String Value");
        inputValues[2] = new String("This is my resume.");
        inputValues[3] = new Timestamp((new java.util.Date()).getTime());

        String insert = "insert into resume (id, name, content, date_created ) values(?, ?, ?, ?)";
        PreparedStatement pstmt = conn.prepareStatement(insert);

        pstmt.setObject(1, inputValues[0]);
        pstmt.setObject(2, inputValues[1]);
        pstmt.setObject(3, inputValues[2]);
        pstmt.setObject(4, inputValues[3]);

        pstmt.executeUpdate();
        String query = "select id, name, content, date_created from resume where id=?";

        PreparedStatement pstmt2 = conn.prepareStatement(query);
        pstmt2.setObject(1, inputValues[0]);
        ResultSet rs = pstmt2.executeQuery();
        Object[] outputValues = new Object[columnNames.length];
        if (rs.next()) {
            for (int i = 0; i < columnNames.length; i++) {
                outputValues[i] = rs.getObject(i + 1);
            }
        }
        System.out.println("id=" + ((java.math.BigDecimal) outputValues[0]).toString());
        System.out.println("name=" + ((String) outputValues[1]));
        System.out.println("content=" + ((Clob) outputValues[2]));
        System.out.println("date_created=" + ((java.sql.Date) outputValues[3]).toString());

        rs.close();
        pstmt.close();
        pstmt2.close();
        conn.close();

    }

    private static Connection getHSQLConnection() throws Exception {
        Class.forName("org.hsqldb.jdbcDriver");
        System.out.println("Driver Loaded.");
        String url = "jdbc:hsqldb:data/tutorial";
        return DriverManager.getConnection(url, "sa", "");
    }

    public static Connection getMySqlConnection() throws Exception {
        String driver = "org.gjt.mm.mysql.Driver";
        String url = "jdbc:mysql://localhost/demo2s";
        String username = "oost";
        String password = "oost";

        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }

    public static Connection getOracleConnection() throws Exception {
        String driver = "oracle.jdbc.driver.OracleDriver";
        String url = "jdbc:oracle:thin:@localhost:1521:databaseName";
        String username = "userName";
        String password = "password";

        Class.forName(driver); // load Oracle driver
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }

}