POI开源项目-PPT2PNG转换测试

第一次学使用软件去读取Office类文件。

今天百度了一下，发现Apache也是有这样的开源项目的，POI提供下列支持：

测试了一下HSLF对PPT的读操作，并将PPT转化为图片保存到指定目录：

使用之前必须将包引入：

　

关联包：

测试主函数如下：

设置输入ppt文件、输出路径、以及生成图片规模大小。

 package edu.office;

 import java.util.List;

 public class TestTransfor {

     /**
      * 测试ppt转换
      *
      * **/
     public static void main(String[] args) {
         PPTReader reader = new PPTReader();
         reader.setPPT_file_path("D:/1.ppt");
         reader.setOutput_path("D:/ppt/");
         //控制图片尺寸 1倍 2倍 3倍
         reader.setScale(1);

         List<String> images = reader.ppt2png();
         for(String image : images){
             System.out.println(image);
         }
     }

 }

PPT转化png类如下：

 package edu.office;

 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
 import java.awt.RenderingHints;
 import java.awt.geom.Rectangle2D;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;

 import javax.imageio.ImageIO;

 import org.apache.poi.hslf.model.Slide;
 import org.apache.poi.hslf.usermodel.SlideShow;

 public class PPTReader{

     //ppt输入文件路径
     private String ppt_file_path;
     //ppt2png保存png图片的路径
     private String output_path;
     //scale是图片是原来的size几倍
     private int scale = 1;

     public String getPpt_file_path() {
         return ppt_file_path;
     }
     public void setPPT_file_path(String ppt_file_path) {
         this.ppt_file_path = ppt_file_path;
     }
     public int getScale() {
         return scale;
     }
     public void setScale(int scale) {
         this.scale = scale;
     }
     public String getOutput_path() {
         return output_path;
     }
     public void setOutput_path(String output_path) {
         this.output_path = output_path;
     }

     /**ppt转png
      *
      * @return null 失败  list<String> 图片名称列表
      * **/
     public List<String> ppt2png(){
         //int slidenum = 2;
         List<String> images = new ArrayList<String>();
         try {
             FileInputStream is;
             is = new FileInputStream(ppt_file_path);
             SlideShow ppt = new SlideShow(is);
             is.close();

             Dimension pgsize = ppt.getPageSize();

             int width = (int)(pgsize.width*scale);
             int height = (int)(pgsize.height*scale);

             Slide[] slide = ppt.getSlides();
             for (int i = 0; i < slide.length; i++) {

                 //if (slidenum != -1 && slidenum != (i+1)) continue;
                 //获取每页ppt标题
                 String title = slide[i].getTitle();
                 //System.out.println("Rendering slide "+slide[i].getSlideNumber() + (title == null ? "" : ": " + title));

                 BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
                 Graphics2D graphics = img.createGraphics();
                 graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
                 graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
                 graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
                 graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);

                 graphics.setPaint(Color.white);
                 graphics.fill(new Rectangle2D.Float(0, 0, width, height));

                 graphics.scale((double)width/pgsize.width, (double)height/pgsize.height);

                 slide[i].draw(graphics);
                 //对每一张图片进行命名
                 String fname = output_path + "ppt-" + (i+1) + ".png";
                 images.add("ppt-" + (i+1) + ".png");
                 File file = new File(output_path);
                 if(!file.exists()){
                     file.mkdirs();
                 }
                 FileOutputStream out = new FileOutputStream(fname);
                 ImageIO.write(img, "png", out);
                 out.close();
             }
             return images;
         } catch (FileNotFoundException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         }
         return null;
     }
 }