Abstract: This article was originally published on CSDN by the technical team of Grape City. Please indicate the source of the reprint: Grape City official website , Grape City provides developers with professional development tools, solutions and services to empower developers.
introduction
GcExcel and POI are two technical libraries used to process Excel files. In order to help developers better understand the differences between them and different applicable scenarios, this article will compare GcExcel and POI, and discuss their differences and applicable fields in practical applications.
GcExcel is a powerful Excel processing library that provides rich functions and flexible interfaces for reading, writing and manipulating Excel files. POI (Poor Obfuscation Implementation) is an open source project of the Apache Foundation, which provides the Excel processing function of the Java language. These two libraries play an important role in processing Excel files and are widely used in data analysis, report generation, import and export, and other fields.
function comparison
read function
Both GcExcel and POI can read the data, formats and charts in Excel files, but GcExcel provides a more concise reading interface through flexible API design, making it easier for developers to extract the required data.
If POI needs to use the File object in Java to open a file, the file path needs to be encapsulated into a File object, and then POI can open it.
GcExcel simplifies this process, and can directly pass in the file path through the open method of the workbook object to open the file.
When traversing to read data, POI needs to nest each cell (cell). GcExcel provides the IRange interface. The range (area) refers to a cell or a cell, and you can directly use the getValue method to obtain data from the range.
POI does not support functions such as slicers, pivot charts, and sparklines, and these functions cannot be modified.
write function
The read and write functions are the two most basic functions of the Excel processing library. In terms of writing, both of them support writing data, styles and formulas into Excel files.
In addition, in addition to saving data as Excel, GcExcel also supports saving data as CSV, converting workbooks or worksheets to PDF, or converting to HTML and pictures, which can adapt to more scenarios.
Conditional Formatting
GcExcel and POI support conditional formatting of cells.
But POI does not support custom icon sets, greater than average, date of occurrence, top 10 items.
GcExcel supports all Excel conditional formatting rules.
Excel conditional formatting
Chart processing
Both GcExcel and POI are able to create and edit charts in Excel.
According to POI's API documentation, from the enumeration type ChartTypes, POI only supports 13 basic chart types.
POI API Documentation
GcExcel supports 64 chart types, except for maps, all types in Excel can be supported.
At the same time, GcExcel supports converting charts into pictures.
GcExcel converts images from charts
formula calculation
Both GcExcel and POI support formula calculation in Excel.
The support for POI formulas is divided into two parts, the formulas whose code is known, and the formulas that implement logic. Among them, 399 formulas are known, of which 216 formulas are realized by code, and the remaining 183 are not realized. For the unrealized formulas, POI needs to customize the implementation.
GcExcel supports 482 formulas, and also supports custom formulas, allowing users to use Java to expand formulas or implement specific business formulas.
performance comparison
Through actual testing, we found that GcExcel performs very well when dealing with large Excel files. Compared with POI, GcExcel has obvious advantages in loading speed, memory usage and stability.
After trying to find, when opening an Excel file containing 10 million cells, GcExcel takes 6.2 seconds and POI takes 63 seconds.
In addition, under the same configuration, GcExcel can open Excel with 15 million cells in only 9.4 seconds, while POI will have problems.
user experience
From a user experience perspective, GcExcel excels in ease of use and documentation support. It provides rich sample codes, detailed product documentation and JavaDoc API documentation to help developers get started quickly and solve common problems. In addition, GcExcel has active community support, where users can obtain technical support and exchange experience.
As an open source project, POI also has a rich ecology. Although the official website provides relatively limited content on the documentation, it also has Java Doc API documentation. In addition, on third-party websites, there are many technical articles or question-and-answer posts that can solve problems encountered in using POI, but you should also pay attention to the POI version corresponding to the third-party documentation.
On the whole, the experience of using GcExcel is more stable and simple, and you can consult a professional technical consultant if you encounter any problems. The POI community needs more active exploration and the ability to solve problems by itself.
Authorization method
POI is free and open source. For many non-commercial projects or internal needs, POI is very suitable.
GcExcel is a commercial license. When developing a commercial project, consider the progress, development cost, security, and stability. GcExcel may be more suitable, it can help improve development efficiency, reduce hidden costs, and improve project quality.
Summarize
To sum up, both GcExcel and POI are powerful Excel processing libraries, but there are differences in some key functions and performance.
GcExcel has advantages in ease of use, performance and functions, and is suitable for business scenarios that require high speed and stability. POI is suitable for developers who pay more attention to compatibility and open source community support. When choosing a technology library, you should weigh the pros and cons based on your specific needs.
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