Convert 7ZIP Files to XLSM in Java

What is 7ZIP file format?

The 7Z file format is a highly popular and open source file format that is widely used for both archiving and data compression. Developed by Igor Pavlov, the 7Z format is utilized by the 7-Zip archiver for creating compressed archives. With its ability to compress a wide range of file types, including executable files, Office documents, and multimedia files, it has become a popular choice among users. One of the most significant advantages of the 7Z format is its high compression ratio, which results in smaller file sizes compared to other compression formats.

Due to its low file size and robust security features, the 7Z format is increasingly being used as a preferred method for transferring large files over the internet. It allows archives to be password-protected and encrypted for additional security, and archives can also be split into multiple volumes or parts for easy transmission or storage on external media.

With support available in numerous archiving programs, including 7-Zip, PeaZip, and WinRAR, the 7Z format is prevalent in the open-source community. It has emerged as a viable solution for developers to bundle multiple files into a single archive for software delivery. The 7Z format also enables the compression of files within an archive without extracting them, making it an efficient and flexible solution for both small and large file archiving and transportation. All in all, the 7Z file format provides a reliable, secure, and efficient way to package and transport files of all types and sizes.

What is XLSM file format?

The XLSM file format is an extension of the XLSX file format used for Microsoft Excel workbooks. Similar to XLSX, it is based on the Open XML file format and is associated with the Excel application. The “M” in XLSM stands for “macro-enabled”, indicating that it supports the inclusion of macros.

XLSM files store spreadsheet data, including worksheets, formulas, charts, and other elements commonly found in Excel workbooks. Additionally, XLSM files allow the embedding of VBA (Visual Basic for Applications) macros within the workbook. Macros are scripts written in VBA that automate tasks, perform calculations, and interact with the spreadsheet data.

By including macros in XLSM files, users can create customized functions, automate repetitive tasks, and enhance the functionality of their Excel workbooks. Macros can be written to manipulate data, generate reports, perform complex calculations, or interact with other applications.

When opening an XLSM file, Excel prompts the user to enable or disable macros due to security concerns. Enabling macros allows the embedded VBA code to execute, while disabling macros prevents potential security risks associated with malicious code.

XLSM files provide advanced features and customization options for Excel users who require automation beyond the capabilities of the standard XLSX format. They are commonly used in business environments, financial modeling, data analysis, and other scenarios where complex calculations and automation are necessary.