Java中实现对oracle数据的操作

1.Java中实现对oracle数据的crud
1)将外部的驱动包添加到构建路径：


2)将驱动加载到JVM：Class.forName(driver)
oracle.jdbc.driver.OracleDriver
3创建连接对象 url ：jdbc:oracle:thin:@localhost:1521:orcl
Jdbc ：mysql://localhost:3306/数据库名

4)通过连接对象实例化PreparedStatement
5)执行sql语句(使用预处理对象) executeUpdate() executeQuery
6)处理结果
7)释放资源
参考代码
public class TestQuerEmp {

public static void main(String[] args) {

	// 1加载JVM
	try {
		//Class.forName("oracle.jdbc.driver.OracleDriver");

		// 2 获取连接对象
		Connection conn = DriverManager.getConnection(
				"jdbc:oracle:thin:@localhost:1521:orcl", "scott", "tiger");

		// 3创建PreparedStatement对象
		PreparedStatement pstmt = conn
				.prepareStatement("select * from emp");

		// 4执行查询
		ResultSet rs = pstmt.executeQuery();
		while (rs.next()) {
			String empno = rs.getString("empno");
			String ename = rs.getString("ename");
			System.out.println(empno + "," + ename);

		}
		
		rs.close();
		pstmt.close();
		conn.close();
	}  catch (SQLException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
}

}