| /* ==================================================================== |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==================================================================== */ |
| |
| package org.apache.poi.examples.xssf.streaming; |
| |
| import org.apache.poi.ss.usermodel.Cell; |
| import org.apache.poi.ss.usermodel.Row; |
| import org.apache.poi.xssf.streaming.DeferredSXSSFSheet; |
| import org.apache.poi.xssf.streaming.DeferredSXSSFWorkbook; |
| |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| |
| /** |
| * This sample demonstrates how to use DeferredSXSSFWorkbook to generate workbooks in a streaming way. |
| * This approach avoids the use of temporary files and can be used to output to streams like |
| * HTTP response streams. |
| */ |
| public class DeferredGeneration { |
| |
| public static void main(String[] args) throws IOException { |
| try (DeferredSXSSFWorkbook wb = new DeferredSXSSFWorkbook()) { |
| DeferredSXSSFSheet sheet1 = wb.createSheet("new sheet"); |
| |
| sheet1.setRowGenerator((ssxSheet) -> { |
| for (int i = 0; i < 10; i++) { |
| Row row = ssxSheet.createRow(i); |
| Cell cell = row.createCell(1); |
| cell.setCellValue("value " + i); |
| } |
| }); |
| |
| try (FileOutputStream fileOut = new FileOutputStream("DeferredGeneration.xlsx")) { |
| wb.write(fileOut); |
| } finally { |
| wb.dispose(); |
| } |
| } |
| } |
| } |