我们可以在web.xml URL模式中使用正则表达式吗？ [英] Can we use regular expressions in web.xml URL patterns?

问题描述

我正在编写一个过滤器来执行特定任务，但我无法为我的过滤器设置特定的url模式。我的过滤器映射如下：

I am writing a filter to do a specific task but I am unable to set a specific url pattern to my filter. My filter mapping is as follows:

 <web.xml>
  <filter>
     <filter-name>myFilter</filter-name>
     <filter-class>test.MyFilter</filter-class>
   </filter>

  <filter-mapping>
    <filter-name>myFilter</filter-name>
     <url-pattern>/org/test/*/keys/*</url-pattern>
   </filter-mapping>
 </web-app>

我的网址格式 [/ org / test / * / keys / * ] 无法正常工作。

My url-pattern [ /org/test/ * /keys/ * ] is not working as I had expected.

我正在通过浏览器调用网址：

I am calling urls from the browser like:

http://localhost:8080/myapp/org/test/SuperAdminReport/keys/superAdminReport.jsp
http://localhost:8080/myapp/org/test/Adminreport/keys/adminReport.jsp
http://localhost:8080/myapp/org/test/OtherReport/keys/otherReport.jsp

因此，对于上面的URL，过滤器模式应匹配。我怎样才能实现这个目标？

So for the URLs above the filter pattern should match. How can I achieve this?

推荐答案

不，你不能在那里使用正则表达式。根据Java Servlet Specification v2.4（section srv.11.1），url-path被解释如下：

No, you can't use a regex there. According to the Java Servlet Specification v2.4 (section srv.11.1), the url-path is interpreted as follows:

• 以'/'字符开头并以'/ *'后缀结尾的字符串用于路径映射。


• 以'*。'前缀开头的字符串是用作扩展映射。


• 仅包含'/'字符的字符串表示应用程序的默认servlet。在这种情况下，servlet路径是
  请求URI减去条件路径，路径信息为空。


• 所有其他字符串仅用于完全匹配。

• A string beginning with a ‘/’ character and ending with a ‘/*’ suffix is used for path mapping.
• A string beginning with a ‘*.’ prefix is used as an extension mapping.
• A string containing only the ’/’ character indicates the "default" servlet of the application. In this case the servlet path is the request URI minus the con- text path and the path info is null.
• All other strings are used for exact matches only.

不允许使用正则表达式。甚至没有复杂的外卡。

No regexes are allowed. Not even complicated wild-cards.

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