java分批读取excel中数据处理
在Java中,可以使用Apache POI库来读取和处理Excel数据。以下是一个简单的例子,展示了如何分批次读取Excel文件中的数据。
import org.apache.poi.ss.usermodel.*; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import java.io.FileInputStream; import java.io.IOException; import java.util.Iterator; public class ExcelBatchRead { public static void main(String[] args) throws IOException { FileInputStream inputStream = new FileInputStream("example.xlsx"); Workbook workbook = new XSSFWorkbook(inputStream); Sheet sheet = workbook.getSheetAt(0); int batchSize = 100; // 设定批次大小 int batchStart = 0; // 当前批次开始行 int batchEnd = batchStart + batchSize; // 当前批次结束行 while (batchStart < sheet.getLastRowNum()) { // 处理当前批次的数据 for (int i = batchStart; i < batchEnd && i < sheet.getLastRowNum(); i++) { Row row = sheet.getRow(i); if (row != null) { // 读取行数据并处理 Iterator<Cell> cellIterator = row.iterator(); while (cellIterator.hasNext()) { Cell cell = cellIterator.next(); // 读取单元格数据 switch (cell.getCellTypeEnum()) { case STRING: System.out.print(cell.getStringCellValue() + "\t"); break; case NUMERIC: System.out.print(cell.getNumericCellValue() + "\t"); break; case BOOLEAN: System.out.print(cell.getBooleanCellValue() + "\t"); break; case FORMULA: System.out.print(cell.getCellFormula() + "\t"); break; default: break; } } System.out.println(); } } // 更新批次边界 batchStart += batchSize; batchEnd = batchStart + batchSize; } workbook.close(); inputStream.close(); } }
标签:java,读取,batchStart,excel,System,cell,out From: https://www.cnblogs.com/xianz666/p/18285345