web项目中连接oracle数据库的步骤

web项目中连接oracle数据库的步骤

首先将oracle安装包（F:\app\Administrator\product\11.2.0\dbhome_1\jdbc\lib）下的ojdbc6.jar（版本不同，名称亦不同）文件拷贝到当前web项目中。

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import java.sql.Timestamp;

public class NewsDao {

 /**

  * 连接数据库，查看新闻信息

  * @param args

  */

 public void getNews(){

  Connection conn = null;

  Statement stmt = null;

  ResultSet rs = null;

  try {

   //(1)Class.forName()加载驱动

   Class.forName("oracle.jdbc.driver.OracleDriver");

   //(2)DriverManager.getConnection(URL,user,password)获得数据库连接(Connection)

   conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","scott","scott");//orcl数据库名

   //(3)获得Statement对象，执行SQL语句

   String sql = "select * from news";

   stmt = conn.createStatement();

   rs = stmt.executeQuery(sql);

   //(4)处理执行结果(ResultSet)

   while(rs.next()){

    int id = rs.getInt("news_id");//news_id为数据库中的字段名

    String title = rs.getString("news_title");

    String content = rs.getString("news_content");

    Timestamp date = rs.getTimestamp("news_date");

    System.out.println(id+"\t"+title+"\t\t"+content+"\t"+date);

   } 

  } catch (ClassNotFoundException e) {

   e.printStackTrace();

  } catch (SQLException e) {

   e.printStackTrace();

  }finally{

   //(5)释放资源

    try {

     rs.close();//倒序释放

     stmt.close();

     conn.close();

    } catch (SQLException e) {

     e.printStackTrace();

    }

  }

 }

 

 public static void main(String[] args) {//测试

  NewsDao news = new NewsDao();

  news.getNews();

 } 

}

以上（1）（2）步骤中Class.forName()、DriverManage.getConnection()中的参数最好在配置文件*.properties中配置，采用key-value的对应方式进行配置