Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {

    public static Connection getConnection() throws Exception {
        String driver = "org.gjt.mm.mysql.Driver";
        String url = "jdbc:mysql://localhost/octopus";
        String username = "root";
        String password = "root";
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }

    public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;
        try {
            conn = getConnection();
            String query = "select id, name from employees";
            stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
            rs = stmt.executeQuery(query);
            while (rs.next()) {
                String id = rs.getString(1);
                String name = rs.getString(2);
                System.out.println("id=" + id + "  name=" + name);
            }
            rs.first();
            rs.deleteRow();
            rs.beforeFirst();
            while (rs.next()) {
                String id = rs.getString(1);
                String name = rs.getString(2);
                System.out.println("id=" + id + "  name=" + name);
            }
        } catch (Exception e) {
            e.printStackTrace();
            System.exit(1);
        } finally {
            try {
                rs.close();
                stmt.close();
                conn.close();

            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}