jdbc連接數據庫的基本步驟

1.在項目中導入java.sql包
2.加載數據庫驅動程序
Class.forName(“com.mysql.cj.jdbc.Driver”);
3.定義數據庫的鏈接地址
String url=“jdbc:mysql://localhost/studentserverTimezone=GMT%2B8&useSSL=false”;
String databasename=“root”;
String pass=“123456”;
4.得到與數據庫的連接對象
con = DriverManager.getConnection(url,databasename,pass);
5.聲明sql語句
select * from rj1602 where Sno=‘201616040212’;
6.得到語句對象
Statement sql
7.執行sql語句
sql = con.CreateStatement();
sql.executeQuery(“select * from rj1602 where Sno=‘201616040212’”)
8.處理sql語句的返回結果
9.關閉對象