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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>第五步：定義 J2EE 資源</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr> 第 6 頁（共14 頁）</nobr></font></td>
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<p>除了上述內容外，您可以在 <i>web.xml</i> 中為類似 JDBC 數據源的資源定義資源引用，甚至定義 ejb 引用。Java 文件在類級別包含這些 XDoclet JavaDoc 樣式的標記（如下所示）：</p>
<p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
/** ...
* @web.resource-ref description="JDBC resource"
* name="jdbc/mydb"
* type="javax.sql.DataSource"
* auth="Container"
...
*/
public class BasicServlet extends HttpServlet {
</code>
</pre>
</p>
<p>以上代碼生成 <i>web.xml</i> 文件中如下元素：
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
...
<resource-ref>
<description>JDBC resource</description>
<res-ref-name>jdbc/mydb</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</code>
</pre>
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