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7 Ιουν 2019 · I am using apache.poi to make an excel file, but when I generate it with a simple java code when I'm trying to open with Microsoft Excel, it says that this file cannot be opened because my file format or extension not valid. I'm using the latest poi, and Micrisoft Office 2019 32-bit.
1 Οκτ 2010 · I manage to create Excel 97-2003 file with Java, but when I try to open it with Windows Explorer, I get the error message file format is not valid. The filename is file.xls so it should be right? W...
9 Ιαν 2024 · In this tutorial, we’ll demonstrate the use of the Apache POI, JExcel, and Fastexcel APIs for working with Excel spreadsheets. These libraries can be used to dynamically read, write and modify the content of an Excel spreadsheet and provide an effective way of integrating Microsoft Excel into a Java Application.
3 Ιουλ 2022 · In Java, reading an Excel file is not similar to reading a Word file because of cells in an Excel file. JDK does not provide a direct API to read data from Excel files for which we have to toggle to a third-party library that is Apache POI.
When you open a file in Excel, you get an message that the file name extension doesn't match the actual file format. For example, the file has an .xlsx file name extension but it's really a text file and should have a .txt file name extension.
22 Ιαν 2023 · Sometimes, the problem occurs due to the unsupported file extension of your Excel file. Step 1. Open your Excel application and then tap the “File” tab. Hit the “Export” option from the list of menus and select the “Change File Type” option. Step 2. Change files extension to some other file format that is well supported by Excel ...
15 Ιαν 2021 · Resetting the Excel file associations will restore Excel to its default settings, undoing any damaging alterations to the program. In most cases, that can help resolve all issues and ensure the program is running smoothly once again. Here's a look at how to restore file associations if Excel won't open: In Windows 10:
