Use the FASTEXCEL WRITER framework to achieve the best practice exported by big data.

Use the FASTEXCEL WRITER framework to achieve the best practice exported by big data. In actual development, large data amounts of data often need to be exported to Excel.Fastexcel Writer is a high -performance Excel writing framework that can effectively process large -scale data export and provide many optimization and best practices to ensure the efficiency and stability of the export process. First, we need to introduce the dependencies of FASTEXCEL WRITER in the project.You can add the following dependencies in the construction file of the project (for example, POM.XML): <dependency> <groupId>com.github.sd4324530</groupId> <artifactId>fastexcel-writer</artifactId> <version>1.0.2</version> </dependency> Next, we can create an instance object to use the Fastexcel Writer.The following is a simple example code: import com.sd4324530.fastexcel.Writer; public class ExcelExportUtil { public void exportToExcel(List<User> userList, String filePath) { try (Writer writer = new Writer(filePath)) { // Set the name of the worksheet writer.setSheetname ("User Information"); // Write the header information writer.writevalue (0, 0, "name"); writer.writevalue (0, 1, "age"); writer.writevalue (0, 2, "gender"); // data input int row = 1; for (User user : userList) { writer.writeValue(row, 0, user.getName()); writer.writeValue(row, 1, user.getAge()); writer.writeValue(row, 2, user.getGender()); row++; } // Write the data to the Excel file writer.flush(); } catch (IOException e) { e.printStackTrace(); } } } In the above code, we first created a Writer object and set the Excel file path to be exported.We can then set the name of the worksheet and write the header information.Then, by cyclically traversing the data list, we use the Writevalue () method to write the data to the corresponding position.Finally, we call the FLUSH () method to write the data into the excel file and close the Writer object. It should be noted that because the Fastexcel wrtern uses Try-With-Resources syntax to ensure that the Writer object can automatically close and release resources automatically after the code block is over. In addition to basic export functions, Fastexcel Writer also provides many other functions, such as merging unit grids and setting unit patterns.By using these functions flexibly, we can further optimize the exported Excel file. In summary, the best practice of using the Fastexcel Writer framework to achieve the export of large data volume Excel includes: introducing dependencies, creating Writer objects, setting worksheet names, writing header information, traversing data writing, refreshing and closing the WRITER object.By using the various functions of FASTEXCEL WERITER reasonably, we can efficiently export a large data amount of Excel file.