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;
    }
}