JDBC使用Demo

package com.dascom.xue;

import java.sql.DriverManager;
import com.mysql.jdbc.*;


public class DBDemo {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO 自动生成的方法存根
        
        String url = "jdbc:MySQL://192.168.20.242:3306/test";
        String user = "root";
        String pwd = "test";
        
        try 
        {
            //加载驱动
            Class.forName("com.mysql.jdbc.Driver");
            //连接数据库
            Connection conn =  (Connection) DriverManager.getConnection(url, user, pwd);
            
            if (!conn.isClosed())
            {
                System.out.println("Connect DB success");
            }
            //创建执行sql的对象
            Statement statment =  (Statement) conn.createStatement();
            
            String sql = "select * from wanbu_data_user where userid=7";
            //执行sql并返回结果集
            ResultSet rs = (ResultSet) statment.executeQuery(sql);
            
            while (rs.next())
            {
                System.out.println(rs.getString("username"));
            }
            conn.close();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }catch (Exception e1)
        {}
    }

}