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Create native excel files (XLS) on the iSeries using Java


Manolis Mariakakis
03.21.2003
Rating: -1.62- (out of 5)


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Here you'll find another way to create native Excel files on the iSeries that will give you programming control over the cells formatting (font assigning, color filling, alignment, border styling, data type assigning, data formatting, formula addition, resizing of rows/columns width and height, Header/Footer customizing , etc). In place of the creation of .csv type Excel files using the CPYTOIMPF command.

In order to understand the features that are given using the POI JavaAPIs, a sample code is presented with which an Excel file is created containing a simple Gantt chart that cannot be produced using the CPYTOIMPF command.

For the manipulation of Excel files, we are using the assistance of an open-source project offering of the Apache Software Foundation, known as POI project, which provides JavaAPIs for


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manipulating file formats that are based on Microsoft's OLE 2 Compound Document format. The project is divided into several components, including one called HSSF (HSSF stands for Horrible Spreadsheet Format!), which reads and writes Excel files, manipulating them extensively. You can read more about the overall structure of the POI project on the POI website here.

The HSSF component lets programmers read and write to Microsoft Excel 97-2002 files (in the BIFF8 file format) using Java. In particular, we are using the org.apache.poi.hssf.usermodel package in the POI jar file. You can obtain the JAR file here.. And because the JAR file may have long name, you can rename it as POI.JAR. In order to run the Java sample ensure that the POI.JAR has included in the classpath parameter.



Code

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