使用POI操作PPT實例

poi讀取ppt的例子，不只是讀取ppt裏面的文字，還要又文字的樣式，佈局，圖片等。poi包從官網下載即可。
HSLF是POI讀寫PPT的API，例子見官方文檔。
http://poi.apache.org/slideshow/quick-guide.html
文檔格式
http://poi.apache.org/slideshow/ppt-file-format.html
操作Shape的API
http://poi.apache.org/slideshow/how-to-shapes.html

1 提取PPT文字

public class PPTReader {
   public static void main(String[] args) throws Exception {
     InputStream is = new FileInputStream(new File("2003.ppt"));
     PowerPointExtractor extractor = new PowerPointExtractor(is);
     String ppString = extractor.getText();
     System.out.println(ppString);
    }

PPT如下：

2 抽取PPT圖片

   public  void findpIC()  {
       try{
            SlideShow ppt = new SlideShow(new HSLFSlideShow("2003.ppt"));
          //將所有圖片提取出來保存到PictureData[]
           PictureData[] pDatas= ppt.getPictureData();
           for (int i = 0; i < pDatas.length; i++) {
            PictureData pict =pDatas[i];


           // 獲得每張圖片的數據
           byte[] data = pict.getData();
           //獲得每張圖片的類型
           int type = pict.getType();
           String ext;
           switch (type) {
           case Picture.JPEG: ext=".jpg";break;
           case Picture.PNG: ext=".png"; break;
           case Picture.WMF: ext=".wmf"; break;
           case Picture.EMF: ext=".emf"; break;
           case Picture.PICT: ext=".pict"; break; 
           default:continue;
         }

           //輸出圖片命名方式：pic_i_ext
           FileOutputStream out = new FileOutputStream("pic_"+i + ext);
           out.write(data);
           out.close();
         }
       }catch (IOException e) {
            // This is not a powerpoint file
           e.printStackTrace();
      }    

   }

3/ 添加一個新的圖片插入到新的幻燈片中，保存

public void addSlide() throws IOException {
       SlideShow ppt = new SlideShow(new HSLFSlideShow("2003.ppt"));
       // 添加一個新的圖片插入到新的幻燈片中
         int idx =ppt.addPicture(new File("cat.jpg"), Picture.JPEG);
       //在幻燈片中設置圖片的大小和位置
       Picture pict = new Picture(idx);
       pict.setAnchor(new Rectangle(100,100,300,200));

       Slide slide = ppt.createSlide();
       slide.addShape(pict);

       //檢索圖片並將ppt保存到磁盤上
       slide = ppt.getSlides()[0];
       Shape[]sh  =slide.getShapes();
       for (int i = 0; i < sh.length; i++){
         if (sh[i] instanceof Picture){
           Picture pict1 = (Picture)sh[i];
           PictureData pictData = pict1.getPictureData();
           byte[] data = pictData.getData();
           int type = pictData.getType();
           if (type == Picture.JPEG){
             FileOutputStream out = new FileOutputStream("slide0_"+i+".jpg");
             out.write(data);
             out.close();
           } else if (type == Picture.PNG){
             FileOutputStream out = new FileOutputStream("slide0_"+i+".png");
             out.write(data);
             out.close();
           }
         }
       }
       FileOutputStream out = new FileOutputStream("slideshow.ppt");
       ppt.write(out);
       out.close();
 }

4/插入表格

 @Test
   public void createTable() throws IOException {
      //準備數據            
      String[][] data = {
       {"INPUT FILE", "NUMBER OF RECORDS"},
       {"Item File", "11,559"},
       {"Vendor File", "300"},
       {"Purchase History File", "10,000"},
       {"Total # of requisitions", "10,200,038"} };

       SlideShow ppt = new SlideShow(new HSLFSlideShow("slideshow.ppt"));
       Slide slide = ppt.createSlide();
     //創建一個表格
      Table table = new Table(5, 2);
      for (int i = 0; i < data.length; i++) {
         for (int j = 0; j < data[i].length; j++) {
           TableCell cell = table.getCell(i, j);
           cell.setText(data[i][j]);

           RichTextRun rt = cell.getTextRun().getRichTextRuns()[0];
           rt.setFontName("Arial");
           rt.setFontSize(10);

           cell.setVerticalAlignment(TextBox.AnchorMiddle);
           cell.setHorizontalAlignment(TextBox.AlignCenter);
       }
   }

   //設置表格的邊距
          Line border = table.createBorder();
          border.setLineColor(Color.black);
          border.setLineWidth(1.0);
          table.setAllBorders(border);

   //第一列的寬度
          table.setColumnWidth(0, 300);
   //第二列的寬度
          table.setColumnWidth(1, 150);

          slide.addShape(table);
          table.moveTo(100, 100);
   //保存
          FileOutputStream out = new FileOutputStream("hslf-table.ppt");
          ppt.write(out);
          out.close();
}

5 去掉PPT中的形狀圖形和聲音

public void removeShapes() throws IOException {

      SlideShow ppt = new SlideShow(new HSLFSlideShow("bullets.ppt"));
      Slide slide = ppt.createSlide();
      Shape[] shape = slide.getShapes();
      for (int i = 0; i < shape.length; i++) {
      boolean ok = slide.removeShape(shape[i]);
       if(ok){
           System.out.println("you are successful remove the shape");
       }
    }
   }

   public void retrieveSound() throws IOException {

        FileInputStream is = new FileInputStream("bullets.ppt");
        SlideShow ppt = new SlideShow(is);
        is.close();

        SoundData[] sound = ppt.getSoundData();
        for (int i = 0; i < sound.length; i++) {
       //保存.WAV格式的音樂
       if(sound[i].getSoundType().equals(".WAV")){
           FileOutputStream out = new FileOutputStream(sound[i].getSoundName());
           out.write(sound[i].getData());
           out.close();
       }
   }
   }

自己畫了主要類圖，不全，個人理解

輸入流有SlideShow進入，輸出流使用文本流寫入保存修改關閉。
SlideShow指整個幻燈片，而Slide 指的是單張幻燈片。SlideMaster 是單張幻燈片的管理類。對於文本信息、超鏈接信息、聲音修改使用TextBox、TextRun、SoundData等類對單張幻燈片進行修改。而背景修改需要使用SlideMaster類調用Fill類進行修改設置。