tomcat 中配置Oracle DataSource
1. 在Context添加如下代码，定义DataSource

<Resource name="jdbc/myoracle" auth="Container"              type="javax.sql.DataSource" driverClassName="oracle.jdbc.OracleDriver"              url="jdbc:oracle:thin:@127.0.0.1:1521:mysid"              username="scott" password="tiger" maxActive="20" maxIdle="10"              maxWait="-1"/> 

2. web.xml添加如下代码

<resource-ref> <description>Oracle Datasource example</description> <res-ref-name>jdbc/myoracle</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth></resource-ref>

3访问DataSource

Context initContext = new InitialContext();Context envContext  = (Context)initContext.lookup("java:/comp/env");DataSource ds = (DataSource)envContext.lookup("jdbc/myoracle");Connection conn = ds.getConnection();//获得数据库的连接