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<Resource name="jdbc/forumDb" auth="Container" type="javax.sql.DataSource"/>
<!-- Resource의 name 속성을 이용해서 각 어플리케이션에서 javax.sql.DataSource 객체를 얻어가게 된다. -->

<!-- 자세한 파라미터 설정은 위의 참조사이트에서 확인 -->
<ResourceParams name="jdbc/forumDb">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>

<parameter>
<name>maxActive</name>
<value>100</value>
</parameter>

<parameter>
<name>maxIdle</name>
<value>30</value>
</parameter>

<parameter>
<name>maxWait</name>
<value>10000</value>
</parameter>

<!-- DB 사용자명과 비밀번호 설정 -->
<parameter>
<name>username</name>
<value>dbuser</value>
</parameter>
<parameter>
<name>password</name>
<value>dbpasswd</value>
</parameter>

<!-- JDBC 드라이버 클래스 -->
<parameter>
<name>driverClassName</name>
<value>oracle.jdbc.driver.OracleDriver</value>
</parameter>

<!-- JDBC 접속 URL -->
<parameter>
<name>url</name>
<value>jdbc:oracle:thin:@dbhost:1521:ORA</value>
</parameter>
</ResourceParams>

<ResourceLink
name="jdbc/forumDb"
global="jdbc/forumDb"
type="javax.sql.DataSource"
/>

<DefaultContext>
<ResourceLink
name="jdbc/forumDb"
global="jdbc/forumDb"
type="javax.sql.DataSource"
/>
</DefaultContext>

<resource-ref>
<description>Forum DB Connection</description>
<!-- 다음이 바로 리소스의 이름 -->
<res-ref-name>jdbc/forumDb</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>

removeAbandoned="true"

removeAbandonedTimeout="60"

logAbandoned="true"

<Context path="/DBTest" docBase="DBTest"
        debug="5" reloadable="true" crossContext="true">

    <!-- maxActive: Maximum number of dB connections in pool. Make sure you
         configure your mysqld max_connections large enough to handle
         all of your db connections. Set to -1 for no limit.
         -->

    <!-- maxIdle: Maximum number of idle dB connections to retain in pool.
         Set to -1 for no limit.  See also the DBCP documentation on this
         and the minEvictableIdleTimeMillis configuration parameter.
         -->

    <!-- maxWait: Maximum time to wait for a dB connection to become available
         in ms, in this example 10 seconds. An Exception is thrown if
         this timeout is exceeded.  Set to -1 to wait indefinitely.
         -->

    <!-- username and password: MySQL dB username and password for dB connections  -->

    <!-- driverClassName: Class name for the old mm.mysql JDBC driver is
         org.gjt.mm.mysql.Driver - we recommend using Connector/J though.
         Class name for the official MySQL Connector/J driver is com.mysql.jdbc.Driver.
         -->

    <!-- url: The JDBC connection url for connecting to your MySQL dB.
         The autoReconnect=true argument to the url makes sure that the
         mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
         connection.  mysqld by default closes idle connections after 8 hours.
         -->

  <Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"
               maxActive="100" maxIdle="30" maxWait="10000"
               username="javauser" password="javadude" driverClassName="com.mysql.jdbc.Driver"
               url="jdbc:mysql://localhost:3306/javatest?autoReconnect=true"/>

</Context>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">
  <description>MySQL Test App</description>
  <resource-ref>
      <description>DB Connection</description>
      <res-ref-name>jdbc/TestDB</res-ref-name>
      <res-type>javax.sql.DataSource</res-type>
      <res-auth>Container</res-auth>
  </resource-ref>
</web-app>

<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"/>

<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>

Context initContext = new InitialContext();
Context envContext  = (Context)initContext.lookup("java:/comp/env");
DataSource ds = (DataSource)envContext.lookup("jdbc/myoracle");
Connection conn = ds.getConnection();
//etc.