使用ForwardAction轉發到一個Servlet組件，實現遺留系統中的Servlet組件重用
Struts中的ForwardAction可以實現轉發功能，它可以轉發到一個Jsp頁面，一個Action對象，或者是Servlet組件。基於此，如果你的系統要使用之前系統中的遺留代碼，比如Servlet組件，那麼就可以通過ForwardAction實現轉發功能，通過Servlet來處理request。實現組件的重用。具體的配置如下：
假設要使用的Servlet爲：
com.myapp.struts.forwardaction.ForwardActionToServlet
首先，在web.xml文件中註冊此Servlet
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<servlet>
<servlet-name>ForwardActionServlet</servlet-name>
<servlet-class>com.myapp.struts.forwardaction.ForwardActionToServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ForwardActionServlet</servlet-name>
<url-pattern>/servlet/ForwardActionServlet</url-pattern>
</servlet-mapping>
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接着在Struts配置文件中配置如下Action
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<!--action path="/toServlet.tos"
type="org.apache.struts.actions.ForwardAction"
scope="request"
parameter="/servlet/ForwardActionServlet"
/>
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此處的parameter屬性是關鍵，將它的值設置爲web.xml中定義的<url-pattern>/servlet/ForwardActionServlet</url-pattern>
中的執行路徑。
新建一個jsp測試頁面test.jsp
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<%@page language="java" contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<html:link action="/toServlet">toServlet</html:link>
</body>
</html>
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點擊頁面中的鏈接後，com.myapp.struts.forwardaction.ForwardActionToServlet會被執行，以處理request，response。這樣就可以加入自己的處理代碼。
