使用Docx4j操作PPT指南系列(四)

 /**
  * 创建对比分析图
  */
 private void createImageChartSlide(
   PresentationMLPackage presentationMLPackage) {

   String partTitle = "";
   String partName = "/ppt/slides/" + getRandomID() + ".xml";

   SlidePart slidePart = createCommonSlide(presentationMLPackage,
     partTitle, partName);

   try {
     // 读取本地文件获取Image部分代码略.......

     byte[] image;
    createImage(presentationMLPackage, slidePart, image, getRandomID(), partTitle, 611560, 1916831, 7992888, 3905767);

   } catch (IOException e) {
    e.printStackTrace();
   }

  }

/**
  * @param presentationMLPackage
  * @param slidePart
  * @param data
  * @param name
  * @param x
  * @param y
  * @param cx
  * @param cy
  */
 private void createImage(PresentationMLPackage presentationMLPackage,
   SlidePart slidePart, byte[] data, String id, String name, long x,
   long y, long cx, long cy) {

  BinaryPartAbstractImage imagePart = null;

  try {
   
   imagePart = BinaryPartAbstractImage.createImagePart(
     presentationMLPackage, slidePart, data);
  } catch (Exception e) {
   e.printStackTrace();
  }

  if (imagePart == null)
   return;

  HashMap mappings = new HashMap();

  mappings.put("id1",  id);
  
  mappings.put("name", "");
  mappings.put("descr", "");
  mappings.put("rEmbedId", imagePart.getSourceRelationship().getId());

// 注意，下面是图片位置的坐标
  mappings.put("offx", Long.toString(x));
  mappings.put("offy", Long.toString(y));
  mappings.put("extcx", Long.toString(cx));
  mappings.put("extcy", Long.toString(cy));

  Object o;

  try {

   o = XmlUtils.unmarshallFromTemplate(imageXml, mappings,
     Context.jcPML, Pic.class);
   
   ((Sld) slidePart.getJaxbElement()).getCSld().getSpTree()
     .getSpOrGrpSpOrGraphicFrame().add(o);

  } catch (JAXBException e) {
   e.printStackTrace();
  }

 }

 /**
  * 图片XML
  */
 private final String imageXml = "<p:pic xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\" "
   + "xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\" "
   + "xmlns:p=\"http://schemas.openxmlformats.org/presentationml/2006/main\">"
   + "<p:nvPicPr><p:cNvPr id=\"${id1}\" name=\"${name}\" descr=\"${descr}\"/>"
   + "<p:cNvPicPr><a:picLocks noChangeAspect=\"1\"/></p:cNvPicPr><p:nvPr/></p:nvPicPr>"
   + "<p:blipFill><a:blip r:embed=\"${rEmbedId}\" cstate=\"print\"/><a:stretch><a:fillRect/>"
   + "</a:stretch></p:blipFill><p:spPr><a:xfrm><a:off x=\"${offx}\" y=\"${offy}\"/>"
   + "<a:ext cx=\"${extcx}\" cy=\"${extcy}\"/></a:xfrm><a:prstGeom prst=\"rect\"><a:avLst/>"
   + "</a:prstGeom></p:spPr></p:pic>";