java.lang.NoClassDefFoundError：org / apache / poi / ss / usermodel / Workbook

I use maven to manage my web project dependency. I add apache poi dependency into my pom file. it does not show error when complied. but when it runs, it will throw RuntimeException at my MainApplication() class. while it gives that java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/WorkbookI use maven to manage my web project dependency