jdbc连接数据库的基本步骤

1.在项目中导入java.sql包
2.加载数据库驱动程序
Class.forName(“com.mysql.cj.jdbc.Driver”);
3.定义数据库的链接地址
String url=“jdbc:mysql://localhost/studentserverTimezone=GMT%2B8&useSSL=false”;
String databasename=“root”;
String pass=“123456”;
4.得到与数据库的连接对象
con = DriverManager.getConnection(url,databasename,pass);
5.声明sql语句
select * from rj1602 where Sno=‘201616040212’;
6.得到语句对象
Statement sql
7.执行sql语句
sql = con.CreateStatement();
sql.executeQuery(“select * from rj1602 where Sno=‘201616040212’”)
8.处理sql语句的返回结果
9.关闭对象