服务器端:(根据Apache POI库函数其中SlideShow表示PPT文档,Slide表示某一张幻灯片)
1.先把电脑中的PPT文件读入到一个字节数组中。(输入流-->字节数组-->输出流-->字节数组)
FileInputStream inputStream = new FileInputStream(Path);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
byte[] byffer = new byte[1024];
int length = -1;
while ((length = is.read(byffer)) != -1) {
byteArrayOutputStream.write(byffer, 0, length);
}
byteArrayOutputStream.close();
byte[] fileBuffer = byteArrayOutputStream.toByteArray();
2.创建SlideShow(把PPT输入流转为SlideShow)
(Apache POI库函数SlideShow(java.io.InputStream inputStream)Constructs a Powerpoint document from an input stream.
)
FileInputStream inputStream = new FileInputStream(Path);
SlideShow ppt = new SlideShow(is);
如果是pptx格式的PPT,则,XMLSlideShow pptx = new XMLSlideShow(is);
3.获取幻灯片数组
Slide slide = ppt.getSlides();
如果是pptx格式的PPT,则,XSLFSlide slidePPTx = pptx.getSlides();
4.使用batik操作SVG图片(生成DOM树)
DOMImplementation domImpl = SVGDOMImplementation.getDOMImplementation();
Document doc = domImpl.createDocument("http://www.w3.org/2000/svg", "svg", null);
5.渲染doc (Document 为存放PPT或pptx的XML数据结构)
SVGGraphics2D graphics = new SVGGraphics2D(doc);
graphics.setSVGCanvasSize( pgsize);
graphics.setPaint(Color.white);
slide[currentPage - 1].draw(graphics);
Element svgRoot = doc.getDocumentElement();
graphics.getRoot(svgRoot);
6.在画布中展示PPT转化为的SVG图片
JSVGCanvas _svgCanvas = new JSVGCanvas();
_svgCanvas.setDocument(doc);