Apache provides checksums for each release. For version 5.2.3:
<mirror> <id>alimaven</id> <url>http://maven.aliyun.com/nexus/content/groups/public/</url> <mirrorOf>central</mirrorOf> </mirror> poi-ooxml-schemas-5.2.3.jar download
If you use a build tool, you do not need to download the JAR manually. Adding the main Apache provides checksums for each release
Are you using a like Maven or Gradle, or are you manually adding jars to your project? Apache POI JAR files compatibility issue - Stack Overflow If you use a build tool
import java.net.URL; import java.net.URLClassLoader; import java.io.File;