How to not filter only a folder in JAVA - Filter

Question

I’m using a class inherited from Filter in Java to do login control.

I did the mapping on Web.xml as follows:

<filter>
    <filter-name>ValidacaoLoginFilter</filter-name>
    <filter-class>br.com.dgtbr.configuracao.ValidacaoLoginFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>ValidacaoLoginFilter</filter-name>
    <url-pattern>/sistema/*</url-pattern>
</filter-mapping>

My problem is I just want the pages .JSP fall into the filter, but I cannot place the url-pattern as follows:

.....
<filter-mapping>
    <filter-name>ValidacaoLoginFilter</filter-name>
    <url-pattern>/sistema/*.jsp</url-pattern>
</filter-mapping>    

The following error occurs:

Deployment is in Progress...
deploy? config=file%3A%2FC%3A%2FUsers%2FLeonardo%2FAppData%2FLocal%2FTemp%2Fcontext4308821743855259488.xml&path=/Dgtbr.
FAIL - Deployed application at context path ... but context failed to start
......nbproject build-impl.xml:1163: The module has not been deployed.
Check the server log for more details.

In short, inside the folder /sistema/ I have another folder that nay I want you to go through Filter.

Answer 1

The java API does not allow specifying this type of pattern. Unfortunately, there are only three ways: by exact path, path with a * at the end, extension.

Additionally, you can apply the filter to a Servlet using the tag <servlet-name> instead of <url-pattern>.

The simplest and most direct way to get around the problem is to put all the files .jsp in a separate folder and map by folder.

Other workaround is map by folder and then put a condition, applying the processing desired only of the requested resource extension is .jsp.

More complex yet more powerful and flexible solutions include using a framework like Google Guice, which has a Filter API for Servlet which acts as an extension of the original API. Virtually every web framework will possess some kind of API to put a Interceptor or filter more personalized.