Java Class Library's Excel file reading skills based on the Streaming Excel Reader framework

Excel file reading skills based on the Streaming Excel Reader framework In Java development, processing Excel files is a common demand.Apache Poi provides a traditional solution, but when dealing with large Excel files, POI has the problem of high memory occupation and low performance.To solve this problem, we can use the Excel file reading skills based on the Streaming Excel Reader framework. Streaming Excel Reader is an open source Java class library that provides an efficient way to read Excel files, which is especially suitable for large files.Here are some techniques to use Streaming Excel Reader: 1. Add Streaming Excel Reader First of all, we need to add Streaming Excel Reader to the project's construction file.Maven dependencies can be added in the following way: <dependency> <groupId>com.monitorjbl</groupId> <artifactId>xlsx-streamer</artifactId> <version>2.1.0</version> </dependency> 2. Create StreamingReader object Next, we need to create a StreamingRead object to read the Excel file.Can be implemented through the following code: FileInputStream fis = new FileInputStream("path/to/excel.xlsx"); Workbook workbook = StreamingReader.builder() .sstCacheSize(100) .open(fis); Here, we pass the path of Excel file and use streamingReader.Builder () to create a StreamingReader object. 3. Traversing Excel table Once we have the StreamingReader object, we can traverse the data in the Excel table in the following way: for (row row: workbook.getsheetat (0)) {// Traversing each line for (cell cell: row) {// traversing each cell // Get the value of the cell String value = cell.getStringCellValue(); // Treat the value of the cell // ... } } This code uses nested for loop to traverse each line and every cell in the Excel table.Then, we can use the cell.getstringCellValue () method to obtain the value of the cell and proceed accordingly. 4. Release resources After completing the reading of Excel files, we need to manually release resources to prevent memory leakage.Can be implemented through the following code: workbook.close(); fis.close(); By calling workbook.close () and FIS.Close () methods, we can release the resources occupied by the Workbook object and the FileInputStream object. This is the Excel file reading skills based on the Streaming Excel Reader framework.Using this framework, we can efficiently read large Excel files to avoid the memory occupation and performance of traditional POI libraries.I hope this article can help you operate more efficiently when handling Excel files in Java development.