在项目 pom.xml 中指定

<build>
    <resources>
        <resource>
            <!--控制资源目录下要打包进去的文件，这里为全部打包-->
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
        </resource>
        <resource>
            <!--细粒度控制-->
            <directory>src/main/resources2</directory>
            <includes>
                <include>**/*.txt</include>
            </includes>
            <excludes>
                <exclude>**/*.jpg</exclude>
            </excludes>
        </resource>
    </resources>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-resources-plugin</artifactId>
            <configuration>
                <encoding>UTF-8</encoding>
                <useDefaultDelimiters>true</useDefaultDelimiters>
                <resources>
                    <!--指定资源目录-->
                    <resource>src/main/resources</resource>
                    <resource>src/main/resources2</resource>
                </resources>
            </configuration>
        </plugin>
    </plugins>
</build>

---

http://maven.apache.org/plugins/maven-resources-plugin/examples/include-exclude.html

https://my.oschina.net/u/2377110/blog/1584204