https://github.com/igapyon/simple-poiwriteexcel

Simple sample to create large excel using POI.
https://github.com/igapyon/simple-poiwriteexcel

Last synced: 2 months ago
JSON representation

Simple sample to create large excel using POI.

• Host: GitHub
• URL: https://github.com/igapyon/simple-poiwriteexcel
• Owner: igapyon
• License: apache-2.0
• Created: 2018-04-18T11:56:06.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2018-04-18T12:58:22.000Z (about 8 years ago)
• Last Synced: 2025-02-24T11:18:47.290Z (over 1 year ago)
• Language: Java
• Size: 9.77 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
[target](http://www.igapyon.jp/igapyon/diary/2018/ig180418.html) 

2018-04-18 diary: [Java] 大きな Excel ブックを Apache POI で作成

=====================================================================================================

[![いがぴょん画像(小)](http://www.igapyon.jp/igapyon/diary/images/iga200306s.jpg "いがぴょん")](http://www.igapyon.jp/igapyon/diary/memo/memoigapyon.html) [いがぴょん](http://www.igapyon.jp/igapyon/diary/memo/memoigapyon.html)の日記に関連のあるコンテンツ。

## [Java] 大きな Excel ブックを Apache POI で作成

大きな Excel ブックを Apache POI を用いて作成するシンプルなサンプルをメモします。

完全なソースコードは以下にあります。

* [https://github.com/igapy...IWriteExcel](https://github.com/igapyon/simple-POIWriteExcel)

ポイントとなるソースコードは以下。

```java

import org.apache.poi.ss.usermodel.Cell;

import org.apache.poi.ss.usermodel.Row;

import org.apache.poi.ss.usermodel.Sheet;

import org.apache.poi.xssf.streaming.SXSSFWorkbook;

        try (SXSSFWorkbook workbook = new SXSSFWorkbook(10)) {

            for (int indexSheet = 0; indexSheet < 4; indexSheet++) {

                final Sheet sheet = workbook.createSheet();

                for (int indexColumn = 0; indexColumn < 20; indexColumn++) {

                    sheet.setColumnWidth(indexColumn, 256 * 3);

                }

                for (int indexRow = 0; indexRow < 100; indexRow++) {

                    final Row row = sheet.createRow(indexRow);

                    for (int indexColumn = 0; indexColumn < 10; indexColumn++) {

                        final Cell cell = row.createCell(indexColumn);

                        cell.setCellValue("Data of (" + indexColumn + ":" + indexRow + ")");

                    }

                }

            }

            try (BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream("./target/aout.xlsx"))) {

                workbook.write(out);

            }

            workbook.dispose();

        }

```