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Unlocking PowerPoint Files: HSLF Java API Guide

Discover HSLF, the pure Java API to read, create, and modify PowerPoint files (.ppt) without needing Microsoft PowerPoint. This guide covers the comprehensive features of HSLF, including support for rich text, tables, shapes, and images, along with a practical demonstration of generating a simple presentation. Learn how to extract data, customize shapes, and format elements using Java code. HSLF is an essential tool for developers looking to integrate PowerPoint functionality into their Java applications.

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Unlocking PowerPoint Files: HSLF Java API Guide

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  1. POI-HSLF Java API To Access Microsoft PowerPoint Format Files Yegor Kozlov yegor - apache - org

  2. What is HSLF? • HorribleSLideshowFormat is the POI Project's pure Java implementation of the Powerpoint '97(-2007) file format. • POI sub-project since 2005

  3. HSLF in a Nutshell • HSLF provides a way to read, create and modify MS PowerPoint presentations • Pure Java API - you don't need PowerPoint to read and write *.ppt files • Comprehensive support of PowerPoint objects • Rich text • Tables • Shapes • Pictures • Master slides • Access to low level data structures

  4. The source code is available at http://people.apache.org/~yegor/apachecon_eu08/

  5. HSLF in Action - 1Data Extraction • Text from slides and notes • Images • Shapes and their properties (type, position in the slide, color, font, etc.)

  6. HSLF in Action - 2 Creating a simple presentation from scratch SlideShow ppt = new SlideShow(); Slide slide = ppt.createSlide(); TextBox box2 = new TextBox(); box2.setHorizontalAlignment(TextBox.AlignCenter); box2.setVerticalAlignment(TextBox.AnchorMiddle); box2.getTextRun().setText("Java Code"); box2.getFill().setForegroundColor(new Color(187, 224, 227)); box2.setLineColor(Color.black); box2.setLineWidth(0.75); box2.setAnchor(new Rectangle(66, 243, 170, 170)); slide.addShape(box2); TextBox box3 = new TextBox(); box3.setHorizontalAlignment(TextBox.AlignCenter); box3.setVerticalAlignment(TextBox.AnchorMiddle); box3.getTextRun().setText("*.ppt file"); box3.setLineWidth(0.75); box3.setLineColor(Color.black); box3.getFill().setForegroundColor(new Color(187, 224, 227)); box3.setAnchor(new Rectangle(473, 243, 170, 170)); slide.addShape(box3); AutoShape box4 = new AutoShape(ShapeTypes.Arrow); box4.getFill().setForegroundColor(new Color(187, 224, 227)); box4.setLineWidth(0.75); box4.setLineColor(Color.black); box4.setAnchor(new Rectangle(253, 288, 198, 85)); slide.addShape(box4); FileOutputStream out = new FileOutputStream("hslf-demo.ppt"); ppt.write(out); out.close();

  7. Java Code *.ppt file

  8. Wait, there is more! • Rich text • Tables • Pictures (JPEG, PNG, BMP, WMF, PICT) • Comprehensive formatting features

  9. HSLF in Action - 3 PPGraphics2D: PowerPoint Graphics2D driver //bar chart data. The first value is the bar color, the second is the width Object[] def = new Object[]{ Color.yellow, new Integer(100), Color.green, new Integer(150), Color.gray, new Integer(75), Color.red, new Integer(200), }; SlideShow ppt = new SlideShow(); Slide slide = ppt.createSlide(); ShapeGroup group = new ShapeGroup(); //define position of the drawing in the slide Rectangle bounds = new java.awt.Rectangle(200, 100, 350, 300); group.setAnchor(bounds); slide.addShape(group); Graphics2D graphics = new PPGraphics2D(group); //draw a simple bar graph int x = bounds.x + 50, y = bounds.y + 50; graphics.setFont(new Font("Arial", Font.BOLD, 10)); for (int i = 0, idx = 1; i < def.length; i+=2, idx++) { graphics.setColor(Color.black); int width = ((Integer)def[i+1]).intValue(); graphics.drawString("Q" + idx, x-20, y+20); graphics.drawString(width + "%", x + width + 10, y + 20); graphics.setColor((Color)def[i]); graphics.fill(new Rectangle(x, y, width, 30)); y += 40; } graphics.setColor(Color.black); graphics.setFont(new Font("Arial", Font.BOLD, 14)); graphics.draw(bounds); graphics.drawString("Performance", x + 70, y + 40); FileOutputStream out = new FileOutputStream("hslf-demo.ppt"); ppt.write(out); out.close();

  10. Q1 100% Q2 150% Q3 75% Q4 200% Performance

  11. HSLF Development Plans • Support for more PowerPoint functionality • Rendering slides into java.awt.Graphics2D • A way to export slides into images or other formats • Integration with Apache FOP - Formatting Objects Processor • Transformation of XSL-FO into PPT • PPT2PDF transcoder

  12. Questions? http://poi.apache.org/hslf/ http://people.apache.org/~yegor

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