Java 什么是 servlet 的“显示名称”？
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What is a servlet's "display-name" for?
提问by Matt Ball
The <display-name>element appears to be a valid sub-element of the <servlet>element as per the Servlet 2.5 deployment descriptor XSD. That is, according to Eclipse's XML validator, this:
所述<display-name>元件似乎是一个有效的子元素<servlet>元素作为每个所述的Servlet 2.5部署描述符XSD。也就是说，根据 Eclipse 的 XML 验证器，这是：
<servlet>
<servlet-name>FooServlet</servlet-name>
<display-name>FooServlet</display-name>
<servlet-class>com.bar.servlet.FooServlet</servlet-class>
</servlet>
is a valid servlet-mapping, while this:
是有效的servlet-mapping，而这个：
<servlet>
<servlet-name>FooServlet</servlet-name>
<random-tag-name>OMGWTFBBQ</random-tag-name>
<servlet-class>com.bar.servlet.FooServlet</servlet-class>
</servlet>
is not (which seems reasonable enough).
不是（这似乎足够合理）。
What's the display-nameactually used for? I haven't been able to dig up anything informative on it.
有什么display-name实际用途？我一直无法挖掘出任何有关它的信息。
采纳答案by skaffman
The <servlet-name>is the canonical, internal name of the servlet, and is used as the key linking things like url-patterns to servlets. <display-name>is for use by admin tools and the like.
该<servlet-name>是servlet的规范，内部名称，并且被用作键连接之类的网址，图案的servlet。<display-name>供管理工具等使用。
This perhaps makes more sense when you consider that the XML Schema permits multiple <display-name>elements, for various languages, e.g.
当您考虑到 XML Schema 允许<display-name>针对各种语言的多个元素时，这可能更有意义，例如
<servlet>
<servlet-name>MyServlet</servlet-name>
<displayable-name xml:lang="en">My Servlet</displayable-name>
<displayable-name xml:lang="fr">Ma Servlet</displayable-name>
</servlet>
(pardon my Frenglais)
（原谅我的弗朗格莱）
回答by bosmacs
I believe it's used primarily by J2EE web-management consoles, when displaying statistics, etc.
我相信它主要由 J2EE Web 管理控制台在显示统计信息等时使用。
回答by Nate
The servlet-nameis used to refer to the servlet in other tags (like servlet-mapping). This could be thought of as the "internal name" of the servlet. The display-nameis the "external name" of the servlet - it's what should show up on a management consoles of servlet containers. Usually, web apps are managed as a unit - they are deployed/undeployed/restarted/etc. as a whole, not managing individual servlets - so there's not a place where you would usually see this display name used.
将servlet-name被用于指代在其他标记（例如小服务程序servlet-mapping）。这可以被认为是 servlet 的“内部名称”。这display-name是 servlet 的“外部名称”——它应该显示在 servlet 容器的管理控制台上。通常，Web 应用程序作为一个单元进行管理 - 它们被部署/取消部署/重新启动等。作为一个整体，不管理单个 servlet - 因此通常不会在某个地方看到使用此显示名称。
回答by chaitanya
回答by IqbalHamid
The <display-name>element is a child element of <servlet>. These are elements used within web.xml deployment descriptor files. The <display-name>is optional and allows for a short name to be associated with the servlet which can be potentially read by GUI tools (such as a web browser) to literally display the name of the servlet to the client if that is required. However, in practice, it is almost never used so can be safely disregarded.
该<display-name>元素是 的子元素<servlet>。这些是在 web.xml 部署描述符文件中使用的元素。这 <display-name>是可选的，并允许与 servlet 相关联的短名称，GUI 工具（例如 Web 浏览器）可能会读取该短名称，以便在需要时向客户端逐字显示 servlet 的名称。然而，在实践中，它几乎从未使用过，因此可以安全地忽略。
