简单的连接数据库的java程序模板

简单的连接数据库的java程序，方便临时使用：

import java.sql.*;

import java.io.*;

import java.sql.DriverManager;

import java.sql.Connection;

import java.sql.SQLException;



public class perftest

{

    public static void main(String arr[]) throws Exception

    {

        System.out.println( "start" );

        DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

        Connection

                conn = DriverManager.getConnection

                ("jdbc:oracle:thin:@LLWP0JKR8KXJJ6J:1521:muphy", "eoda", "foo");

        Integer iters = new Integer(arr[0]);

        Integer commitCnt = new Integer(arr[1]);



        conn.setAutoCommit( false );



        doInsert(conn, 1, 1);



        Statement stmt = conn.createStatement();

        stmt.execute("begin dbms_monitor.session_trace_enable(waits=>true); end;");



        doInsert(conn, iters.intValue(), commitCnt.intValue());



        conn.close();

    }



    static void doInserts(Connection con, int count, int commitCount )

            throws Exception

    {

        PreparedStatement ps =

                con.prepareStatement

                        ("insert into test " +

                                "(id, code, descr, insert_user, insert_date)"

                                + " values (?,?,?, user, sysdate)");

        int  rowcnt = 0;

        int  committed = 0;

        for (int i = 0; i < count; i++ )

        {

            ps.setInt(1,i);

            ps.setString(2,"PS - code" + i);

            ps.setString(3,"PS - desc" + i);

            ps.executeUpdate();

            rowcnt++;

            if ( rowcnt == commitCount )

            {

                con.commit();

                rowcnt = 0;

                committed++;

            }

        }

        con.commit();

        System.out.println

                ("pstatement rows/commitcnt = " + count + " / " +  committed );

    }

}