连接数据库

public class jdbctest {
    public static void main(String[] args) throws Exception{
        String url="jdbc:mysql://localhost:3306/da?useUnicode=true&characterEncoding=utf8";
        String user="root";
        String password="";
        Connection conn=null;
        Statement st=null;
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            Connection connection = DriverManager.getConnection(url,user,password);
           

        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            conn.close();
        }
    }
}