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Optimized Memory Usage When Working with Big Excel Files Using Java

sherazam khan
Ranch Hand

Joined: Mar 10, 2010
Posts: 302
What is new in this release?

The long awaited version of Aspose.Cells for Java 8.0.0 has been released. This release supports optimizing memory usage when working with big Microsoft Excel files with large data sets. When building a workbook with large data sets, or reading a big template file, the total amount of RAM the process will use is always a concern. Aspose.Cells provides measures that can be adopted to cope with the challenge. Aspose.Cells provides some relevant options to lower, reduce and optimize memory usage. For example, the MemorySetting. MEMORY_PREFERENCE option optimizes memory use for the cells data to decrease the overall memory cost. Aspose.Cells also allows to get/set the time of generating the PDF documents for Excel to PDF conversion, sometimes you might need to set your desired custom DateTime for the PDF files. There is another valuable Microsoft Excel’s features is to show formulas instead of values in a worksheet. You can show formulas instead of the calculated values in Microsoft Excel using the Show Formulas option from the Formulas ribbon. Once, you enable it, Microsoft Excel displays formulas inside the worksheet. We have added a number of enhancements and fixes to this release. We have also fixed some exceptions which were thrown when reading and writing Excel files and rendering images from worksheets. We have improved the chart to image and sheet to image modules and fixed issues with manipulating charts and shapes as well. Several other important issues have also been addressed. For example, issues with rendering Excel files to HTML file format, applying formatting, auto-filtering data in List objects/Tables and exporting Excel workbooks to PDF format have been resolved in this release. A few other improvements are also made to Aspose.Cells for Java’s formula calculation engine. This release includes plenty of improved features and bug fixes as listed below

- Get Starting Row/Column and Ending Row/Column indexes for a page of worksheet
- Support for Show Formulas MS Excel feature
- Aspose.Cells and Maven dependencies
- Set the creation time in the generated PDF
- Typo in method name - SeriesCollection.setSecondCategoryData
- Custom Series DataLabel Separator
- Cell.DisplayStringValue did not calculate accurately for spaces determined by column width and '*' in style's custom is fixed
- setExportActiveWorksheetOnly change align of table in HTML
- Background image is now copied to destination workbook when calling Workbook.copy
- Text inside an image appears to be Mirrored while saving an excel workbook as PDF is now fixed.
- Some words are separated when saving to PDF is now fixed
- Table autofilter is enhanced and work in xls and xlsx format properly
- When export to HTML, cells covered by image loses background color is fixed
- Background image path is now corrected
- Vertical text issue is resolved
- Formatting issue of shapes/controls in Excel to PDF conversion are fixed
- Incorrect wrapping of Axis Labels is fixed when converting XLSX to PDF
- DateTime columns now correctly read from CSV with European locale
- Image output mirrored while transforming an excel worksheet into PDF is now fixed
- Apose.Cells: embedded sigma plot chart now rendered correctly to PDF/images
- Incorrect wrapping of Axis Labels is fixed when converting XLSX to PDF
- Data is now corrected in the output pdf
- Background image path is now corrected
- Export Shapes to html with error background color is fixed
- Recalculation cell's formula
- Row hidden and row height issues are resolved

Other most recent bug fixes are also included in this release.

Newly added documentation pages and articles

Some new tips and articles have now been added into Aspose.Cells for Java documentation that may guide you briefly how to use Aspose.Cells for performing different tasks like the followings.

- Optimizing Memory Usage while Working with Big Files having Large Datasets
- Converting Excel to PDF Files

Overview: Aspose.Cells for Java

Aspose.Cells is a Java component for spreadsheet reporting without using Microsoft Excel. Other features include creating spreadsheets, opening encrypted excel files, macros, VBA, unicode, formula settings, pivot tables, importing data from JDBC ResultSet and support of CSV, SpreadsheetML, PDF, ODS and all file formats from Excel 97 to Excel 2007. It is compatible with Windows, Linux & Unix and supports all advanced features of data management, formatting, worksheet, charting and graphics.

More about Aspose.Cells for Java

- Homepage of Aspose.Cells for Java
- Download Aspose.Cells for Java
- Online documentation of Aspose.Cells for Java
- Demos of Aspose.Cells for Java

Contact Information
Aspose Pty Ltd,
Suite 163, 79 Longueville Road
Lane Cove, NSW, 2066
Australia
Aspose - The .NET and Java component publisher
[email]sales@aspose.com[/email]
Phone: 888.277.6734
Fax: 866.810.9465
 
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