Connection-通过OracleDriver的基本方法建立Connection连接

//DriverManager加载驱动
Class.forName(“oracle.jdbc.driver.OracleDriver”);

//获取Connection
Connection
conn=DriverManager.getConnection(“jdbc:oracle:thin:@localhost:1521:orcl”,”scott”,”123456”);

//创建Statement，执行SQL语句
Statement st=conn.createStatement();
String sql=”select * from emp”;

//返回ResultSet结果集
ResultSet rs=st.executeQuery(sql);
While(rs.next()){
Rs.getString(“userName”);
}

//释放资源（最后建立的，最先关闭）
Rs.close();
St.close();
Conn.close();