解決方法:
指定maven編譯檔案類型
在<build></build>裡加上
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
<includes>
<include>*.properties</include>
<include>*.xml</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<filtering>false</filtering>
<excludes>
<exclude>*.properties</exclude>
<exclude>*.xml</exclude>
</excludes>
</resource>
</resources>