如何确保servlet没有被加载？
我的 web.xml 中有 servlet，但我不希望我的应用程序加载它，人们会认为如果我们不希望加载该 servlet，那么将它放在那里的目的是什么，实际上我需要它在 web.xml 中，因为我正在部署应用程序的两个实例，在一个实例上我需要拥有该 servlet，而在另一个实例上我不想拥有它，并且我只使用一个 web.xml，不知道如何做到这一点。
这是我的 web.xml：
<servlet>
<servlet-name>StartServlet</servlet-name>
<servlet-class>com.web.startServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
我无法输入 -ve 值，因为容器会随机调用此 servlet，请在此纠正我并建议正确的方法。
I have servlet in my web.xml but i don't want my application to load it, one would think that if we don't want that servlet to load then what is the purpose of putting it there, actually I need to have it in web.xml because am deploying two instances of application and on one instance I need to have that servlet and on another I do not want to have it and I'm using only one web.xml, am not sure how this can be done.
Here is my web.xml:
<servlet>
<servlet-name>StartServlet</servlet-name>
<servlet-class>com.web.startServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
I cannot put -ve value because then container would invoke this servlet randomly, kindly correct me here and advise of an proper way to do it.
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您可以使用 web.xml 中的
enabled元素禁用 Servlet（这意味着无法通过定义的 url 模式映射访问它）。Servlet 3.0 规范章节8.2.3 从 web.xml、web-fragment.xml 和注释组装描述符 说：
enabled元素在 XML 架构 此处，并且可以作为You can disable the Servlet (which means that it will not be reachable through defined url-pattern mapping) by using
enabledelement in web.xml.Servlets 3.0 specification in Chapter 8.2.3 Assembling the descriptor from web.xml, web-fragment.xml and annotations says:
The
enabledelement is defined in XML Schema here and can be found as a child element of the<servlet>element.<load-on-startup>allows you to configure lazy-loading. By default the servlet is loaded only when it is accessed (by its url-pattern). You can set it to be loaded on startup instead.也就是说，如果您将不应该加载的 servlet 设置为仅根据请求加载，然后使用负载平衡器来确保无论命中该服务器的任何 URL 都会命中另一台服务器，那么您可能会很高兴。
博佐+1。他的回答是一个很好的起点。
That said, if you set the servlet that isn't supposed to load to only load on request, and then use a load balancer to ensure that whatever URL would hit that server hits the other one instead, you'd probably be good to go.
+1 to Bozho. His answer is a great place to start.