[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:testCompile (default-testCompile) on project maven01-model: Compilation failure[ERROR] /D:/Demo/maven01/src/test/java/com/imooc/maven01/model/HelloWorldTest.java:[9,56] 找不到符號[ERROR] ? 符號: ? 類 HellWorld[ERROR] ? 位置: 類 com.imooc.maven01.model.HelloWorldTest[ERROR][ERROR] -> [Help 1][ERROR][ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.[ERROR] Re-run Maven using the -X switch to enable full debug logging.[ERROR][ERROR] For more information about the errors and possible solutions, please read the following articles:[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException