JAva pdf生成ピクチャ

  
            commons-logging
            commons-logging
            1.2
        
        
            org.apache.pdfbox
            fontbox
            2.0.15
        
        
            org.apache.pdfbox
            pdfbox
            2.0.15
        

package com.util;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.imageio.ImageIO;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;

public class Test2 {
	public static void main(String[] args) {
		//pdf2multiImage("H:\\test\\zhaofengdeng\\3.pdf","H:\\test\\zhaofengdeng\\3.jpg");
		test();
	}

	public static void test() {
		List imageList = pdfToImagePath("H:\\test\\zhaofengdeng\\2.pdf");
		Iterator iterator = imageList.iterator();
		while (iterator.hasNext()) {

			System.out.println(iterator.next());
		}
	}

	/**
	 *  PDF          jpg  
	 * 
	 * @param filePath
	 * @return
	 */
	public static List pdfToImagePath(String filePath) {
		List list = new ArrayList<>();
		String fileDirectory = filePath.substring(0, filePath.lastIndexOf("."));//            

		String imagePath;
		File file = new File(filePath);
		try {
			File f = new File(fileDirectory);
			if (!f.exists()) {
				f.mkdir();
			}
			PDDocument doc = PDDocument.load(file);
			PDFRenderer renderer = new PDFRenderer(doc);
			int pageCount = doc.getNumberOfPages();
			for (int i = 0; i < pageCount; i++) {
				//   1,           (   )
				// BufferedImage image = renderer.renderImageWithDPI(i, 296);
				//   2,           (   )
				BufferedImage image = renderer.renderImage(i, 1.25f); //                 ，        
				imagePath = fileDirectory + "/" + i + ".jpg";
				ImageIO.write(image, "PNG", new File(imagePath));
				list.add(imagePath);
			}
			doc.close(); //     ,   pdf        。
		} catch (IOException e) {
			e.printStackTrace();
		}
		return list;
	}

	/**
	 * @Description pdf      
	 * @created 2019 4 19    1:54:13
	 * @param pdfFile
	 * @param outpath
	 */
	private static void pdf2multiImage(String pdfFile, String outpath) {
		try {
			InputStream is = new FileInputStream(pdfFile);
			PDDocument pdf = PDDocument.load(is);
			int actSize = pdf.getNumberOfPages();
			List piclist = new ArrayList();
			for (int i = 0; i < actSize; i++) {
				BufferedImage image = new PDFRenderer(pdf).renderImageWithDPI(i, 130, ImageType.RGB);
				piclist.add(image);
			}
			yPic(piclist, outpath);
			is.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 *         ，        ##  ：      
	 * 
	 * @param piclist      
	 * @param outPath     
	 */
	public static void yPic(List piclist, String outPath) {//       
		if (piclist == null || piclist.size() <= 0) {
			System.out.println("      !");
			return;
		}
		try {
			int height = 0, //    
					width = 0, //    
					_height = 0, //       ,        
					__height = 0, //      ，        
					picNum = piclist.size();//      
			int[] heightArray = new int[picNum]; //          
			BufferedImage buffer = null; //      
			List imgRGB = new ArrayList(); //         RGB
			int[] _imgRGB; //         RGB  
			for (int i = 0; i < picNum; i++) {
				buffer = piclist.get(i);
				heightArray[i] = _height = buffer.getHeight();//     
				if (i == 0) {
					width = buffer.getWidth();//     
				}
				height += _height; //      
				_imgRGB = new int[width * _height];//       RGB
				_imgRGB = buffer.getRGB(0, 0, width, _height, _imgRGB, 0, width);
				imgRGB.add(_imgRGB);
			}
			_height = 0; //        0
			//      
			BufferedImage imageResult = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
			for (int i = 0; i < picNum; i++) {
				__height = heightArray[i];
				if (i != 0)
					_height += __height; //       
				imageResult.setRGB(0, _height, width, __height, imgRGB.get(i), 0, width); //     
			}
			File outFile = new File(outPath);
			ImageIO.write(imageResult, "jpg", outFile);//    
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}