Data import and exporting actual combat in the EasyExcel framework

EasyExcel is a lightweight -dimensional framework based on Java, which is used to handle the import and export of Excel files.It provides a simple and easy -to -use API that can quickly realize the interaction between data between excel files.This article will introduce how to use EasyExcel to implement data import and export, and provide related Java code examples. 1. Import Excel data First of all, we need to create a physical class to map data in Excel.Suppose we have a user -class user, including ID, name, and Age fields. public class User { private Long id; private String name; private Integer age; // omit the constructor and getter/setter method } Next, we use EasyExcel's `Read` method to import Excel data. String filename = "path/to/excel/file.xlsx"; List<User> userList = new ArrayList<>(); EasyExcel.read(filename, User.class, new AnalysisEventListener<User>() { @Override public void invoke(User user, AnalysisContext analysisContext) { userList.add(user); } @Override public void doAfterAllAnalysed(AnalysisContext analysisContext) { // The operation after the import is completed } }).sheet().doRead(); In the above code, we designate the path of the Excel file and the User class as the target class of the analysis.By implementing the `Invoke` method of the` AnalysisVentListener` interface, we can add it to the user list after the analysis of each line of data.In the method of `DOAFTERALANALYSED`, we can perform the operation after the introduction. 2. Export data to Excel Similar to importing data, we need to create a list containing user data, and use the `write` method of EasyExcel to export the data to the Excel file. String filename = "path/to/excel/file.xlsx"; List <user> userlist = getuserlist (); // method of obtaining user data EasyExcel.write(filename, User.class).sheet("Sheet1").doWrite(userList); In the above code, we designate the path, user class, and worksheet name of the Excel file.By calling the `Dowrite` method, we can export the data of the user list to the Excel file. In summary, the introduction and export of data with the EasyExcel framework are very simple.Through several lines of code, we can easily process the data interaction of the Excel file.I hope this article will help you understand the data import and export function of the EasyExcel framework. *Please note that the above examples are not tested, please make appropriate modifications and adjustments according to your needs.