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。

 1 package edu.office;
 2
 3 import java.util.List;
 4
 5 public class TestTransfor {
 6
 7     /**
 8      * 测试ppt转换
 9      *
10      * **/
11     public static void main(String[] args) {
12         PPTReader reader = new PPTReader();
13         reader.setPPT_file_path("D:/1.ppt");
14         reader.setOutput_path("D:/ppt/");
15         //控制图片尺寸 1倍 2倍 3倍
16         reader.setScale(1);
17
18         List<String> images = reader.ppt2png();
19         for(String image : images){
20             System.out.println(image);
21         }
22     }
23
24 }

PPT转化png类如下：

  1 package edu.office;
  2
  3 import java.awt.Color;
  4 import java.awt.Dimension;
  5 import java.awt.Graphics2D;
  6 import java.awt.RenderingHints;
  7 import java.awt.geom.Rectangle2D;
  8 import java.awt.image.BufferedImage;
  9 import java.io.File;
 10 import java.io.FileInputStream;
 11 import java.io.FileNotFoundException;
 12 import java.io.FileOutputStream;
 13 import java.io.IOException;
 14 import java.util.ArrayList;
 15 import java.util.List;
 16
 17 import javax.imageio.ImageIO;
 18
 19 import org.apache.poi.hslf.model.Slide;
 20 import org.apache.poi.hslf.usermodel.SlideShow;
 21
 22 public class PPTReader{
 23
 24     //ppt输入文件路径
 25     private String ppt_file_path;
 26     //ppt2png保存png图片的路径
 27     private String output_path;
 28     //scale是图片是原来的size几倍
 29     private int scale = 1;
 30
 31     public String getPpt_file_path() {
 32         return ppt_file_path;
 33     }
 34     public void setPPT_file_path(String ppt_file_path) {
 35         this.ppt_file_path = ppt_file_path;
 36     }
 37     public int getScale() {
 38         return scale;
 39     }
 40     public void setScale(int scale) {
 41         this.scale = scale;
 42     }
 43     public String getOutput_path() {
 44         return output_path;
 45     }
 46     public void setOutput_path(String output_path) {
 47         this.output_path = output_path;
 48     }
 49
 50     /**ppt转png
 51      *
 52      * @return null 失败  list<String> 图片名称列表
 53      * **/
 54     public List<String> ppt2png(){
 55         //int slidenum = 2;
 56         List<String> images = new ArrayList<String>();
 57         try {
 58             FileInputStream is;
 59             is = new FileInputStream(ppt_file_path);
 60             SlideShow ppt = new SlideShow(is);
 61             is.close();
 62
 63             Dimension pgsize = ppt.getPageSize();
 64
 65             int width = (int)(pgsize.width*scale);
 66             int height = (int)(pgsize.height*scale);
 67
 68             Slide[] slide = ppt.getSlides();
 69             for (int i = 0; i < slide.length; i++) {
 70
 71                 //if (slidenum != -1 && slidenum != (i+1)) continue;
 72                 //获取每页ppt标题
 73                 String title = slide[i].getTitle();
 74                 //System.out.println("Rendering slide "+slide[i].getSlideNumber() + (title == null ? "" : ": " + title));
 75
 76                 BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
 77                 Graphics2D graphics = img.createGraphics();
 78                 graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
 79                 graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
 80                 graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
 81                 graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
 82
 83                 graphics.setPaint(Color.white);
 84                 graphics.fill(new Rectangle2D.Float(0, 0, width, height));
 85
 86                 graphics.scale((double)width/pgsize.width, (double)height/pgsize.height);
 87
 88                 slide[i].draw(graphics);
 89                 //对每一张图片进行命名
 90                 String fname = output_path + "ppt-" + (i+1) + ".png";
 91                 images.add("ppt-" + (i+1) + ".png");
 92                 File file = new File(output_path);
 93                 if(!file.exists()){
 94                     file.mkdirs();
 95                 }
 96                 FileOutputStream out = new FileOutputStream(fname);
 97                 ImageIO.write(img, "png", out);
 98                 out.close();
 99             }
100             return images;
101         } catch (FileNotFoundException e) {
102             e.printStackTrace();
103         } catch (IOException e) {
104             e.printStackTrace();
105         }
106         return null;
107     }
108 }