JDBC简单用法

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBC_Main01 {

public static void main(String[] args) throws ClassNotFoundException, SQLException {
// TODO Auto-generated method stub
//1、加载数据库驱动
Class.forName("org.sqlite.JDBC");
//2、获取连接对象
Connection conn=DriverManager.getConnection("jdbc:sqlite:myStudy.db");
//3、获取执行sql语句对象
Statement sm=conn.createStatement();
//4、操作SQL语句
//executeUpdate:执行非查询SQL语句
//		sm.executeUpdate("drop table if exists Log");
//执行建表语句
sm.executeUpdate("create table if not exists Log(id integer primary key,msg varchar(100))");
//执行插入语句
sm.executeUpdate("insert into Log(msg) values('测试日志信息')");
//executeQuery:执行查询的SQL语句
ResultSet rs=sm.executeQuery("select * from Log");
//5、获取查询结果并输出
//循环从查询结果集中获取结果数据
//next:下一行数据
while (rs.next()) {
//getXX:获取指定索引或字段名称的值
System.out.println("id:"+rs.getInt(1)+",msg:"+rs.getString("msg"));
}
//6、关闭
sm.close();
conn.close();
}

}