title: XLSX file reading error
body: <p>I am trying to read xlsx file to get data form file 
  but my code generate en eroor like this  </p>
  
  <p>apache poi is not working or help to read xlsx file<br>
  any can tell what i need to do solve this error<br>
  or other way to read xlsx file in java </p>
  
  <pre><code>Exception in thread "main" java.lang.IllegalStateException: Zip File is closed
      at org.apache.poi.openxml4j.util.ZipFileZipEntrySource.getEntries(ZipFileZipEntrySource.java:45)
      at org.apache.poi.openxml4j.opc.ZipPackage.getPartsImpl(ZipPackage.java:161)
      at org.apache.poi.openxml4j.opc.OPCPackage.getParts(OPCPackage.java:662)
      at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:223)
      at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:186)
      at ExampleEventUserModel.processOneSheet(ExampleEventUserModel.java:18)
      at ExampleEventUserModel.main(ExampleEventUserModel.java:115)
  </code></pre>