Convert 7Z Files to XLSM in Java

What is 7Z file format?

The 7Z file format is a popular open source file format used for both archiving and data compression. It was created by Igor Pavlov and is used by the 7-Zip archiver to create compressed archives. The 7Z format is popular because it offers a high compression ratio and the capability to compress many types of files, including executable files, Office documents, and multimedia files. The 7Z format is also increasingly being used as an effective way to transfer large files over the internet due to its low file size and strong security features. Compressed archives can be password protected and encrypted in the 7Z file format for additional security. Additionally, 7Z archives can be split into multiple volumes or parts for easy transmission over the internet or storage on external media. The 7Z file format is very popular in the open source community, with support for it available in a variety of archiving programs, including 7-Zip, PeaZip, and WinRAR, among others. It is commonly used to compress large files on Windows and Linux systems.

Many developers are beginning to look to the 7Z file format as an effective way of delivering software, as it is an efficient way to bundle multiple files into a single archive. Additionally, the 7Z format has the advantage of being able to compress files within an archive without the need to extract them first. Overall, the 7Z file format is a powerful and efficient way to package and transport both small and large files. It offers a high degree of security and strong compression, making it an ideal choice for archiving and transferring data.

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.