java.lang.NoClassDefFoundError: org/apache/poi/xssf/usermodel/XSSFWorkbook AND java.lang.ClassNotFoundException: org.apache.poi.xssf.usermodel.XSSF
You need to add poi-ooxml-5.0.0.jar which contains that class.
Download from here.
java.lang.ClassNotFoundException: org.apache.commons.collections4.ListValuedMap
You need a more recent version of commons-collections4.
If you look at the Javadocs for ListValuedMap, you'll see that it was introduced in version 4.1, and you have 4.0 on your classpath.
You should consider using Maven or another dependency management tool as it will save you a lot of headaches.
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