一.连接sql步骤
1.加载数据库驱动类
2.获取数据库连接对象
3.写sql
4.创建PreparedStatement对象
5.执行查询返回ResultSet结果集对象
7.释放资源
public static void main(String[] args) {
try {
Class.forName("oracle.jdbc.driver.OracleDriver"); //驱动路径
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String url="jdbc:oracle:thin:@127.0.0.1:1521:orcl";
String user="scott"; //用户名
String password="tiger"; //用户密码
String sql="select * from emp"; //sql语句
Connection c=null;
PreparedStatement r=null;
ResultSet sc=null;
try {
c=DriverManager.getConnection(url, user, password); //连接登入用户
r=c.prepareStatement(sql);
sc=r.executeQuery();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
while(sc.next()) { //遍历列表属性
System.out.println(sc.getInt(1));
}