Springboot预览功能， 将word转为pdf时报错ava.lang.NoClassDefFoundError :org/apache/poi/POIXMLDocumentPart

先清理一下没用的依赖版本，然后将下面的加入到pom文件中，所有的都要3.15版本

<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.15</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.15</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.15</version>
</dependency>