Import data based on the EasyExcel framework exported actual combat

Import data based on the EasyExcel framework exported actual combat Importing and exporting data is a common demand in the development process, and EasyExcel is a powerful and easy to use Java framework that can be used to quickly realize the data import and export of the Excel file.In this article, we will introduce how to import and export data with the EasyExcel framework, and provide the corresponding Java code example. 1. Import data Introduction data usually involves reading and converting the data in the Excel file into a Java object to further process it in the application.EasyExcel provides rich API to support data import operations.Below is a simple example, showing how to use EasyExcel to import the data in the Excel file: // Create an excel file reader ExcelReader excelReader = EasyExcel.read(inputStream).build(); // Set the sheet readings, you can set the specific sheet name or index as needed excelReader.setSheet(sheetName); // Register a listener to receive each line of data read excelReader.read(new AnalysisEventListener() { @Override public void invoke(Object data, AnalysisContext context) { // Process each line of data, you can convert the data to Java object or perform other operations System.out.println(data); } @Override public void doAfterAllAnalysed(AnalysisContext context) { // The operation of the data read is complete } }); // Turn off the reader excelReader.finish(); In the above examples, by creating the `ExcelReader` object, and using the` Build` method to build a reader.Then, you can set the sheet to read by calling the `setSheet` method, and then call the` Read` method into the monitor to start reading the data.In the `Invoke` method of the listener, each line of data can be processed.Finally, turn off the reader by calling the `Finish` method. 2. Export data Export data usually involves writing data in the Java object to Excel file.EasyExcel provides rich API to support data export operations.Below is a simple example, showing how to use EasyExcel to export data to Excel file: // Create an excel file writer ExcelWriter excelWriter = EasyExcel.write(outputStream).build(); // Write data to specify sheet excelWriter.write(dataList, EasyExcel.writerSheet(sheetName).build()); // Turn off the writer excelWriter.finish(); In the above examples, by creating the `Excelwriter` object, and using the` Build` method to build a write -offer.Then use the `write` method to write the data to the specified sheet.`datalist` is a list of data to be written, and` sheetname` is the sheet name to be written.Finally, turn off the writer by calling the `Finish` method. In summary, the EasyExcel framework provides simple and powerful features, which can easily implement data import and export of Excel files.Developers only need to set appropriate parameters and processing logic according to the above example code to quickly complete the import and export operation of the data.