Excel file for exporting large quantities (more than one million) of data with Java

This example shares the excel file of more than one million data exported by Java for your reference. The specific contents are as follows

1. The traditional export method will consume a lot of memory. In 2003, each sheet page can have 65536 pieces of data at most, and in 2007, each sheet page can have more than 1 million pieces of data. In 2007, the data will be cleaned up when generating the workbook, so the export volume in 2007 is greater;

2. You can export multiple Excel files to a directory, and then package and download them;

3. Export XML files in Excel format. This method can export data in batches and is suitable for exporting large quantities of data. This method is briefly introduced below:

The code is as follows:

After exporting the XML file, modify the suffix directly Xlsx can be opened directly. Disadvantage: it cannot be exported Excel file in XLS format The above is just a simple idea, which will be implemented in the future

Extension: since you can export excel using XML file, you can also directly change the suffix to after exporting CSV file Xls, at present, is just an idea, which has not been proved feasible

The above is the whole content of this article. I hope it will be helpful to your study, and I hope you can support programming tips.