JDBCTest

Posted 2020-09-04 TaoLeonis

package cn.itcast.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.junit.Test;

public class JDBCTest {
	@Test
    public void demo() throws SQLException, ClassNotFoundException{
    	//DriverManager.registerDriver(new Driver());//加载JDBC驱动
    	Class.forName("com.mysql.jdbc.Driver"); //加载JDBC驱动
    	Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/day03","root","mima");//建立连接
    	 Statement stmt = conn.createStatement();//将sql语句发送给数据库执行
    	 ResultSet rs = stmt.executeQuery("select * from student");
    	 while(rs.next()){
    	    System.out.println(rs.getString("city"));
    	 }
    	 rs.close(); //释放资源
    	 stmt.close();  
    	 conn.close();
    }
	
}