Exception when writing to the xlsx document several times using apache poi 3.7

Question

I am getting the following exception while trying to write an .xlsx file using Apache POI: org.apache.xmlbeans.impl.values.XmlValueDisconnectedException

Answer 1

The solution I've found for this, and I've been looking for a while, is to make sure you don't open your Workbook with the File which you use to open the FileOutputStream to save the Workbook. Instead, use a FileInputStream to open the Workbook.

Something like this will work flawlessly

        File inputFile = new File("Your-Path");
        this.inputStream = new FileInputStream(inputFile);
        this.opc = OPCPackage.open(this.inputStream);
        this.workbook = WorkbookFactory.create(opc);

...

        this.outputStream = new FileOutputStream(inputFile);
        this.workbook.write(this,outputStream);

Don't forget to close every opened stream and the OPCPackage.