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.Statement;

import javax.sql.RowSetMetaData;
import javax.sql.rowset.WebRowSet;

import com.sun.rowset.WebRowSetImpl;

public class Main {
    public static void main(String[] args) throws Exception {
        Connection conn = getHSQLConnection();
        System.out.println("Got Connection.");
        Statement st = conn.createStatement();
        st.executeUpdate("create table survey (id int,name varchar);");
        st.executeUpdate("create view surveyView as (select * from survey);");
        st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
        st.executeUpdate("insert into survey (id,name ) values (2,'anotherValue')");

        String sqlQuery = "SELECT * FROM survey";
        WebRowSet webRS = new WebRowSetImpl();
        webRS.setCommand(sqlQuery);
        webRS.execute(conn);

        // create RowSetMetaData object
        RowSetMetaData rsMD = (RowSetMetaData) webRS.getMetaData();
        System.out.println("rsMD=" + rsMD);
        if (rsMD == null) {
            System.out.println("vendor does not support RowSetMetaData");
        } else {
            int columnCount = rsMD.getColumnCount();
            System.out.println("columnCount=" + columnCount);
        }
        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:caspian";
        String username = "mp";
        String password = "mp2";

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