Comparison and selection of EasyExcel framework and Poi

The comparison and choice of EasyExcel framework and POI In Java development, processing Excel files is a common demand.EasyExcel framework and POI (Apache open source library) are two popular solutions to handle Excel.This article will compare these two frameworks and share how to choose according to needs. 1. Functional comparison EasyExcel is an annotated Java framework that provides simple APIs to read and write Excel files.It has the characteristics of high performance and low memory occupation, and can handle the excel file with large data.EasyExcel also supports multi -threaded reading and writing, providing some auxiliary functions such as merging unit grids and style settings. POI is a powerful Java library that can read, write and operate Excel files.It supports all Office file formats, including XLS, XLSX and new Office XML formats.POI provides more functions, such as processing the processing of charts, images, and other additional objects. At the same time, it also supports Excel's advanced features such as data perspective tables and formula calculations. 2. Difficulty in use EasyExcel is more useful than POI.It provides a simple API, which only needs a few lines of code to complete the reading and writing operation of the excel file.EasyExcel also provides rich examples and detailed documents, so that beginners can easily get started. The use of POI is slightly more complicated, and you need to be familiar with the working principle and API of POI.POI provides a large number of classes and methods to handle Excel, and developers need to read the documents carefully to use it correctly.However, once you are familiar with the use of POI, you can find its flexibility and powerful functions. 3. Performance comparison EasyExcel performed well when processing the large data volume.It uses SAX (SIMPLE API For XML) mode to read and write Excel, reducing memory occupation and improving performance.In addition, EasyExcel also supports multi -threaded reading and writing, which further improves the speed of processing large files. POI's performance is relatively low, especially when processing large excel files, it takes up a lot of memory.This is because POI uses DOM (DOCUMENT Object Model) mode, and needs to load the entire Excel file into memory.Therefore, when processing the large data volume, considering performance factors, EasyExcel is a better choice. 4. Community support Although EasyExcel is a relatively new framework, it has a large user group in China and has active community support.Users can get timely answers and support in the community. POI is a widely used and tested framework with strong community support.It has known problems and has a corresponding solution.POI also has a large number of documents, tutorials, and sample code for developers for reference. In summary, EasyExcel and POI are excellent solutions to handle the excel file.Which one depends on the specific needs.If you need to handle large data volumes of Excel files or the easier and easier API, EasyExcel is a more suitable choice.If you need richer functions and greater flexibility, POI is a better choice. The following is an example code for reading and writing Excel files with EasyExcel: // Import the class related to EasyExcel import com.alibaba.excel.EasyExcel; import com.alibaba.excel.context.AnalysisContext; import com.alibaba.excel.event.AnalysisEventListener; // Create a reader based on event monitoring public class ExcelListener extends AnalysisEventListener<User> { // Rewrite the reading method @Override public void invoke(User user, AnalysisContext context) { // Process the data you read System.out.println ("Name:" + User.getName () + ", Age:" + User.getage ()); } // The method of executing when reading reads @Override public void doAfterAllAnalysed(AnalysisContext context) { // The operation after reading is completed } } // Use EasyExcel to read the excel file public class ExcelReader { public static void main(String[] args) { String filename = "data.xlsx"; // excel file path // Create a listener and pass into the generic type ExcelListener listener = new ExcelListener(); // Call the reading method of EasyExcel, pass the file path and listener EasyExcel.read(fileName, User.class, listener).sheet().doRead(); } } // User class is the corresponding data model public class User { private String name; private int age; // getter and setter method } I hope this article will help you understand the comparison of the EasyExcel framework and POI and the choice.Select the appropriate solution according to the specific situation, and use the corresponding example code to read and write the excel file as needed.