java jdbc数据库操作

package shb.java.demo3;

import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
/**
 * jdbc操作数据库
 * @Package:com.cnpc.dlp.web.event.controller
 * @Description：
 * @author Shihaobin
 * @Date 2015-8-27下午1:31:15
 */
public class Demo12 {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/base";
        String username = "root";
        String password = "bin";
        try {
            //加载数据库驱动
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            //获得和数据库连接
            java.sql.Connection connection= DriverManager.getConnection(url, username, password);
            //创建查询对象
            Statement statement = connection.createStatement();
            String sqlinsert = "insert into usertable (username,password)values('lizhe','923840298')";
            String sqlString = "select username from usertable u where u.password = 'sdf'";
            //执行sql语句
            statement.execute(sqlinsert);
            System.out.println("success");    
            statement.close();
            connection.close();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 
        
    }
}

如有错误请各位纠正，谢谢。