How to achieve the efficient writing of the excel file

Fastexcel Writer is an open source framework for Java, which aims to achieve efficient writing of Excel files.Using Fastexcel Writer can easily generate a large amount of data and write it into the Excel file, providing many optimized techniques to improve the speed and performance. 1. FASTEXCEL WRITER basic usage Here are the basic steps for efficient writing using the Fastexcel Writer framework to implement Excel files: 1. Create an excel file First, we need to create a new Excel file.You can use the following code to create a new workbook and choose the worksheet you want to use: Workbook workbook = new Workbook(); Worksheet worksheet = workbook.createNewWorksheet("Sheet1"); 2. Define data columns Next, we need to define the data column to be written.You can use the following code to add the data column to the worksheet: worksheet.addColumn(new Column(columnIndex, "Column1")); worksheet.addColumn(new Column(columnIndex+1, "Column2")); ... 3. Write data Now, we can use the Fastexcel Writer framework to write the data into the worksheet.You can use the following code to write the data into the specified cell: worksheet.setCellValue(rowIndex, columnIndex, value); 4. Save the excel file Finally, we need to save the Excel file.You can use the following code to save the workbook as Excel file: workbook.save("output.xlsx"); 2. FASTEXCEL WRITER performance optimization skills Fastexcel Writer provides some performance optimization techniques to ensure the efficient Excel file writing. 1. Batch writing data It is recommended to use the `setCellValues ()` method to write data from multiple cells at one time, instead of writing into the cells one by one.This can reduce the number of writing files and improve the writing performance. List<CellData> cellDataList = new ArrayList<>(); cellDataList.add(new CellData(rowIndex, columnIndex, value1)); cellDataList.add(new CellData(rowIndex, columnIndex+1, value2)); // ... worksheet.setCellValues(cellDataList); 2. Enable buffer By enabling the buffer, a certain amount of data can be cached in memory, and then it can be written into the excel file at one time to reduce the number of IO operations.When creating a worksheet, you can use the following code to enable the buffer: Worksheet worksheet = workbook.createNewWorksheet("Sheet1", true); 3. Use multiple threads to write data Fastexcel Writer supports writing data at the same time in multiple threads to effectively use the performance of multi -core processors.You can use the following code to create a working table that supports multi -threaded writing: Worksheet worksheet = workbook.createNewWorksheet("Sheet1", true, true); 3. Summary Fastexcel Writer is an excellent Java framework that can achieve efficient writing of Excel files.By using the Fastexcel Writer framework, we can easily generate a large amount of data and write it into the Excel file.In addition, by using performance optimization techniques, such as in batches, enable buffer and multi -threaded writing data, it can further improve writing efficiency and performance. The above is a Chinese knowledge article about the efficient writing of excel files about the Fastexcel Writer framework.Hope to help you!