JDBC连接数据库代码

//连接是需要导包   http://pan.baidu.com/s/1o6nyuOa 
/*配合数据库建立表

create database day14 character set utf8 collate utf8_general_ci;

use day14;

create table users(
id int primary key,
name varchar(40),
password varchar(40),
email varchar(60),
birthday date
);
insert into users(id,name,password,email,birthday) values
(1,'zs','123456','[email protected]','1980-12-04');
insert into users(id,name,password,email,birthday) values
(2,'lisi','123456','[email protected]','1981-12-04');
insert into users(id,name,password,email,birthday) values
(3,'wangwu','123456','[email protected]','1979-12-04');

*/
package cn.itcast.demo;



import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.Statement;



public class Demo1 {

    public static void main(String[] args) throws Exception {

        

        String url="jdbc:mysql://localhost:3306/day14";

        String username="root";

        String password="seeker";

        

        //1.加载驱动

        DriverManager.registerDriver(new com.mysql.jdbc.Driver());

        

        //2.获取与数据库的连接,导接口包，程序的维护性好，

        Connection conn = DriverManager.getConnection(url, username, password);

        

        //3.获得发送语句的statement对象

        Statement st=conn.createStatement();

        

        //4.向数据库发送sql,并获得结果集（表格方式封装）

        String sql="select id,name,password,email,birthday from users";

        ResultSet rs=st.executeQuery(sql);

        

        //5.取出结果集的数据

        while(rs.next())//往后移动，指向具体的数据行

        {

            System.out.println("id=" + rs.getObject("id"));

            System.out.println("name=" + rs.getObject("name"));

            System.out.println("password=" + rs.getObject("password"));

            System.out.println("email=" + rs.getObject("email"));

            System.out.println("birthday=" + rs.getObject("birthday"));

        }

        //6.关闭连接、与数据库交互的对象也释放掉

        rs.close();

        st.close();

        conn.close();

    }

}