ワークブック内の特定のワークシートのみをロードする
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デフォルトでは、Aspose.Cellsはスプレッドシート全体をメモリに読み込みます。特定のシートだけを読み込むことも可能です。これによりパフォーマンスが向上し、メモリ消費が少なくなります。大きなワークブックに複数のワークシートが含まれる場合に便利なアプローチです。
ワークブック内の特定のワークシートをロードする
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// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java | |
// The path to the documents directory. | |
String dataDir = Utils.getDataDir(LoadSpecificWorksheetsinWorkbook.class); | |
//Define a new Workbook | |
Workbook workbook; | |
/// Load the workbook with the specified worksheet only. | |
LoadOptions loadOptions = new LoadOptions(LoadFormat.XLSX); | |
loadOptions.setLoadFilter(new CustomLoad()); | |
// Creat the workbook. | |
workbook = new Workbook(dataDir+ "TestData.xlsx", loadOptions); | |
// Perform your desired task. | |
// Save the workbook. | |
workbook.save(dataDir+ "outputFile.out.xlsx"); | |
public class CustomLoad extends LoadFilter | |
{ | |
public void startSheet(Worksheet sheet) | |
{ | |
if (sheet.getName() == "Sheet2") | |
{ | |
// Load everything from worksheet "Sheet2" | |
this.setLoadDataFilterOptions(LoadDataFilterOptions.ALL); | |
} | |
else | |
{ | |
// Load nothing | |
this.setLoadDataFilterOptions(LoadDataFilterOptions.NONE); | |
} | |
} | |
} |