File APIs for Word/Excel/PowerPoint/PDF

  Excel files are commonly used in backend systems for reporting, data exchange, and batch processing. In many projects, they act as structured data containers moving between services, departments, or external systems. However, once password protection is applied, automated workflows can easily break. You may run into situations like: A scheduled job fails because the uploaded file requires an open password The file loads successfully, but certain worksheets cannot be modified A data import module crashes due to unexpected encryption These issues are not rare in Java backend development. Especially in reporting systems, batch processors, or import/export modules, improper handling of password-protected Excel files can directly affect system stability. In this article, we’ll walk through how to handle Excel password operations in Java, including: Detecting whether an Excel file is password protected Removing a workbook open password Resetting an existing password Unprotecting a spec...

In daily work, we often need to handle files in different formats. Among them,   TIFF (Tagged Image File Format)   is a high-quality image format widely used for scanned images, faxes, medical images, and other scenarios where image quality is crucial. However, while TIFF offers excellent image fidelity,   PDF   is often preferred for file sharing, printing, and archiving due to its better compatibility and convenience. In this article, we’ll walk you through  how to convert TIFF images to PDF using Java , including examples for both single-file and batch conversions. Why Convert TIFF to PDF? Before diving into code, let’s look at why you might need to convert TIFF files to PDF: Better Compatibility TIFF files offer high image quality, but not all platforms can view them easily. PDF, on the other hand, is a universal standard that works across almost all operating systems and devices without relying on specific image viewers. Converting TIFF to PDF ensures your ...