maven filtering replace multiple tokens during build?

Question

I am able to replace the token with patter ${..} under src/main/resources. I want to also replace the tokens with pattern @{} under specific file src/main/webapp/WEB-INF/content/test.jsp or directory src/main/webapp/WEB-INF/content.

I tried adding <delimiter>@{test.version}</delimiter> But I am not sure how to make specific directory src/main/webapp/WEB-INF/content.

test.version will come at runtime like mvn clean install -Dtest.version=100

<build>
    <resources>
    <resource>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
            <includes>
                <include>**/*</include>
            </includes>
        </resource> 

    </resources>
 </build>



<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-resources-plugin</artifactId>
    <version>2.5</version>
    <inherited>true</inherited>
    <configuration>
        <encoding>UTF-8</encoding>
        <nonFilteredFileExtensions>
            <nonFilteredFileExtension>xls</nonFilteredFileExtension>
        </nonFilteredFileExtensions>
         <delimiters>
          <delimiter>${*}</delimiter>
          <delimiter>@{*}</delimiter>
        </delimiters>
    </configuration>
</plugin>

Answer 1

The placeholder @{*} seems not to work with the replacer plugin.

As you anyway want to replace the placeholer by a value. You might use in the JSP files #{test.version} instead. For the filtering you can define different directories. See the snippet below.

Assuming following structure.

pom.xml
src/main/resources/hello.txt
src/main/webapp/WEB-INF/content/test.jsp
src/main/webapp/WEB-INF/web.xml

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
         http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>sub.optimal.example</groupId>
    <artifactId>superapp</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>superapp</name>

    <properties>
        <test.version>world</test.version>
    </properties>
    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
            <resource>
                <targetPath>../webapp/WEB-INF/content</targetPath>
                <filtering>true</filtering>
                <directory>src/main/webapp/WEB-INF/content</directory>
            </resource>
        </resources>
        <plugins>      
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.7</version>
                <inherited>true</inherited>
                <configuration>
                    <encoding>UTF-8</encoding>
                    <delimiters>
                        <delimiter>${*}</delimiter>
                        <delimiter>#{*}</delimiter>
                        <!-- this delimiter is not recognized -->
                        <delimiter>@{*}</delimiter>
                    </delimiters>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <webResources>
                        <resource>
                            <directory>target/webapp</directory>
                        </resource>
                    </webResources>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

hello.txt

Hello $ ${test.version} txt
Hello # #{test.version} txt
Hello @ @{test.version} txt

test.jsp

Hello $ ${test.version} jsp
Hello # #{test.version} jsp
Hello @ @{test.version} jsp

build the WAR file

mvn clean package

output

> jar tf superapp-1.0-SNAPSHOT.war
META-INF/
META-INF/MANIFEST.MF
WEB-INF/
WEB-INF/classes/
WEB-INF/content/
WEB-INF/classes/hello.txt
WEB-INF/content/test.jsp
WEB-INF/web.xml
META-INF/maven/sub.optimal.example/superapp/pom.xml
META-INF/maven/sub.optimal.example/superapp/pom.properties

# copy the file into a temp directory and extract it
# jar xf superapp-1.0-SNAPSHOT.war

>cat WEB-INF/classes/hello.txt
Hello $ world txt
Hello # world txt
Hello @ @{test.version} txt

>cat WEB-INF/content/test.jsp
Hello $ world jsp
Hello # world jsp
Hello @ @{test.version} jsp

The example only shows the idea and might need some tweaks to exclude files, file locations, and so on.