@乔普·艾根（Joop
Eggen）在这里给出了正确答案：http://codingdict.com/questions/123947
仅仅定义该属性是不够的。您必须在适当的插件中传递它。里面不会有魔术。
<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>...</version> <configuration> <source>1.6</source> <target>1.6</target> <encoding>${project.build.sourceEncoding}</encoding> </configuration></plugin><plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-resources-plugin</artifactId> <version>...</version> <configuration> <encoding>${project.build.sourceEncoding}</encoding> </configuration></plugin>...<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties>
