📄 入門 18 - plugin介面 - javaworld@tw.htm
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SomeService service = <SPAN class=java-keyword>new</SPAN> SomeService();
......
servlet.getServletContext().setAttribute(<SPAN class=java-quote>"service"</SPAN>, service);;
}
<SPAN class=java-keyword>public</SPAN> void destroy() {
<SPAN class=java-comment>// 釋放資源 </SPAN>
}
<SPAN class=java-keyword>public</SPAN> void setXXX(<SPAN class=java-object>String</SPAN> xxx) {
…
}
}</PRE></DIV></DIV><BR> 為了讓ActionServlet知道要「掛上」這個PlugIn，您要在struts-config.xml中設定：
<DIV class=code
style="BORDER-TOP-STYLE: solid; BORDER-RIGHT-STYLE: solid; BORDER-LEFT-STYLE: solid; BORDER-BOTTOM-STYLE: solid">
<DIV class=codeHeader
style="BORDER-BOTTOM-STYLE: solid"><B>struts-config.xml</B></DIV>
<DIV class=codeContent><PRE><plug-in className=<SPAN class=java-quote>"onlyfun.caterpillar.MyPlugIn"</SPAN>>
<set-property
property=<SPAN class=java-quote>"XXX"</SPAN>
value=<SPAN class=java-quote>"abcde"</SPAN>/>
</plugin></PRE></DIV></DIV><BR> 如果您在某個Action中必須使用到「掛上」的資源，您可以由Action的Field成員servlet（ActionServlet物件）來取得ServletContext，並取出所必須的資源，例如：
<DIV class=code
style="BORDER-TOP-STYLE: solid; BORDER-RIGHT-STYLE: solid; BORDER-LEFT-STYLE: solid; BORDER-BOTTOM-STYLE: solid">
<DIV class=codeContent><PRE><<SPAN class=java-keyword>public</SPAN> ActionForward execute(ActionMapping mapping,
Actionform form,
HttpServletRequest request,
HttpServletResponse response)
<SPAN class=java-keyword>throws</SPAN> Exception {
.......
ServletContext context = servlet.getServletContext();
SomeService service = (SomeService) context.getAttribute(<SPAN class=java-quote>"service"</SPAN>);
......
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