JDBC链接数据库

1.4大参数

驱动名com.mysql.jdbc.Driver

        String url="jdbc:mysql://LOCALHOST:3306/nb";
        String username ="root" ;
        String password ="123456";

2.加载驱动类

3.得到Connection

package in.nb.jdbc01;

import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import org.junit.Test;
import com.mysql.jdbc.Connection;
public class JdbcC {
    @Test
    public void  fun1() throws ClassNotFoundException, SQLException{
        String driverClassName="com.mysql.jdbc.Driver";
        String url="jdbc:mysql://LOCALHOST:3306/nb";
        String username ="root" ;
        String password ="123456";
        Class.forName(driverClassName);
        Connection connection=(Connection) DriverManager.getConnection(url, username, password);
        System.out.println(connection);
    
    }

}