Java Cloud SDK は、文書変換向けです。

//Get your App SID and App Key at https://dashboard.groupdocs.cloud (free registration is required).

ConversionApi apiInstance = new ConversionApi("AppSID", "AppKey");

ConvertSettings settings = new ConvertSettings();
settings.setStorageName("Storage Name");
settings.setFilePath("documents/myDocument.docx");
settings.setFormat("xlsx");

// Load a Word Processing Document ( DOCX ) to convert into any supported format
DocxLoadOptions loadOptions = new DocxLoadOptions();
loadOptions.setPassword("password");
loadOptions.setHideWordTrackedChanges(true);
loadOptions.setDefaultFont("Arial");

settings.setLoadOptions(loadOptions);

// Conversion Settings to convert into a Spreadsheet document
XlsxConvertOptions convertOptions = new XlsxConvertOptions();
convertOptions.setFromPage(1);
convertOptions.setPagesCount(2);
convertOptions.setFromPage(1);
convertOptions.setPassword("password");
convertOptions.setUsePdf(true);

settings.setConvertOptions(convertOptions);
settings.setOutputPath("documents/converted-docs");

// Convert to Specified Format
List response = apiInstance.convertDocument(new ConvertDocumentRequest(settings));