解決Maven異常：MojoExecutionException with mvn clean install

例如：如下異常：

Could not copy webapp classes [E:\VirtualCard\web-app\target\classes]
org.apache.maven.plugin.MojoExecutionException: Could not copy webapp classes [E:\VirtualCard\web-app\target\classes]
java.io.IOException: 文件名、目錄名或卷標語法不正確。

如果是生成文件名稱時間戳格式問題的話，將如下代碼複製到POM中：

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
</properties>