Java Web 应用程序：欢迎文件列表无法使用 servlet 映射
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Web-app: welcome-file-list not working using servlet-mapping
提问by Jus12
When visiting the bare url (e.g., localhost:8080), I want the same behavior as visiting localhost:8080/foo. A servlet (actually a JSP) is mapped to /foo. My web.xml is
当访问裸 url（例如localhost:8080）时，我想要与访问相同的行为localhost:8080/foo。一个 servlet（实际上是一个 JSP）被映射到/foo. 我的 web.xml 是
<?xml version="1.0" encoding="ISO-8859-1" ?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>Test</display-name>
<description></description>
<!-- servlets -->
<servlet>
<servlet-name>TestServlet</servlet-name>
<jsp-file>/test/welcome.jsp</jsp-file>
</servlet>
<!-- mappings -->
<servlet-mapping>
<servlet-name>TestServlet</servlet-name>
<url-pattern>/foo</url-pattern>
<url-pattern>/foo/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>/foo</welcome-file>
</welcome-file-list>
</web-app>
When I do http://localhost:8080/foo, I get the correct output; the output of test/welcome.jspis displayed. However, when visiting the bare url http://localhost:8080, jetty displays the file list and Tomcat 6 gives a page not found. Is my web.xmlcorrect?
当我这样做时http://localhost:8080/foo，我得到了正确的输出；test/welcome.jsp显示输出。但是，在访问裸 url 时http://localhost:8080，jetty 显示文件列表，而 Tomcat 6 给出一个页面未找到。我的web.xml正确吗？
(versions: jetty-8.0.y.z-SNAPSHOT, Tomcat 6, Java 1.6, servlet-api-2.5)
（版本：jetty-8.0.yz-SNAPSHOT、Tomcat 6、Java 1.6、servlet-api-2.5）
Changing <welcome-file>/foo</welcome-file>to <welcome-file>foo</welcome-file>makes no difference.
更改<welcome-file>/foo</welcome-file>为<welcome-file>foo</welcome-file>没有区别。
Is there a mistake in my web.xml? If not, what is the right way to do what I want.
我的 web.xml 中是否有错误？如果没有，做我想做的事情的正确方法是什么。
EDIT: Seems to be a bug in Jetty-8. It started working in Jetty-9.
编辑：似乎是 Jetty-8 中的一个错误。它开始在 Jetty-9 中工作。
回答by Jus12
remove /from this <welcome-file>/foo</welcome-file>It should be
/从中 删除<welcome-file>/foo</welcome-file>它应该是
<welcome-file>foo</welcome-file>
回答by Justin Cuaresma
It should be:
它应该是：
<servlet-mapping>
<servlet-name>TestServlet</servlet-name>
<url-pattern>/foo</url-pattern>
<url-pattern>/foo/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>foo</welcome-file>
</welcome-file-list>
Here's a good explanation: http://wiki.metawerx.net/wiki/HowToUseAServletAsYourMainWebPage
这是一个很好的解释：http: //wiki.metawerx.net/wiki/HowToUseAServletAsYourMainWebPage
回答by jjoller
Not sure if this also works in Jetty 8 (you should probably update anyway), but in Jetty 9 you can put the following code in your web.xml to enable Servlets as welcome files for Jetty:
不确定这是否也适用于 Jetty 8（您可能无论如何都应该更新），但在 Jetty 9 中，您可以将以下代码放入您的 web.xml 以启用 Servlet 作为 Jetty 的欢迎文件：
<!-- Enable servlets as welcome files -->
<context-param>
<param-name>
org.eclipse.jetty.servlet.Default.welcomeServlets
</param-name>
<param-value>true</param-value>
</context-param>
See this docs: http://download.eclipse.org/jetty/stable-9/apidocs/org/eclipse/jetty/servlet/DefaultServlet.html
请参阅此文档：http: //download.eclipse.org/jetty/stable-9/apidocs/org/eclipse/jetty/servlet/DefaultServlet.html
