需求

将pdf拆分成多个图片 且清晰

依赖

<dependency><groupId>com.kenai.nbpwr</groupId><artifactId>com-sun-pdfview</artifactId><version>1.0.5-201003191900</version><type>nbm</type>
</dependency>

具体代码

package com.example.demo.utils;import com.example.demo.pojo.PdfImg;
import com.sun.pdfview.PDFFile;
import com.sun.pdfview.PDFPage;
import java.awt.Rectangle;
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.io.OutputStream;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import javax.imageio.ImageIO;/***  <p>Title : Pdf2Image </p>*  <p>Description : PDF转换png图片格式</p>** @author huifer* @date 2019年1月2日*/
public class Pdf2Image {private static final int BUFFER_SIZE = 2 * 1024;public static void main(String[] args) throws Exception {String read = "D:\\qfile\\科技查新报告（智慧排涝）.pdf";ArrayList<File> strings = pdf2img(read);String newF = "E:\\mck\\PDF2\\fa\\" + read.split("\\\\")[read.split("\\\\").length - 1]+ ".zip";PdfImg pdfImg = new PdfImg();pdfImg.setPdf(read);pdfImg.setZip(newF);System.out.println(pdfImg);FileOutputStream fos2 = new FileOutputStream(new File(newF));toZip(strings, fos2);}public static void toZip(List<File> srcFiles, OutputStream out) throws RuntimeException {long start = System.currentTimeMillis();ZipOutputStream zos = null;byte[] buf = new byte[BUFFER_SIZE];try {zos = new ZipOutputStream(out);for (File srcFile : srcFiles) {zos.putNextEntry(new ZipEntry(srcFile.getName()));int len;FileInputStream in = new FileInputStream(srcFile);while ((len = in.read(buf)) != -1) {zos.write(buf, 0, len);}zos.closeEntry();in.close();}long end = System.currentTimeMillis();System.out.println("压缩完成，耗时：" + (end - start) + " ms");// 删除压缩列表中的文件for (int i = 0; i < srcFiles.size(); i++) {srcFiles.get(i).delete();}} catch (Exception e) {throw new RuntimeException("zip error from ZipUtils", e);} finally {if (zos != null) {try {zos.close();} catch (IOException e) {e.printStackTrace();}}}}public static ArrayList<File> pdf2img(String read) {ArrayList<File> ps = new ArrayList<>();try {String filePath = read;String[] split = filePath.split("\\\\");File file = new File(filePath);RandomAccessFile raf;raf = new RandomAccessFile(file, "r");FileChannel channel = raf.getChannel();ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());PDFFile pdffile = new PDFFile(buf);int num = pdffile.getNumPages();for (int i = 0; i < num; i++) {PDFPage page = pdffile.getPage(i);int width = (int) page.getBBox().getWidth();int height = (int) page.getBBox().getHeight();Rectangle rect = new Rectangle(0, 0, width, height);int rotation = page.getRotation();Rectangle rect1 = rect;if (rotation == 90 || rotation == 270) {rect1 = new Rectangle(0, 0, rect.height, rect.width);}BufferedImage img = (BufferedImage) page.getImage(rect.width *2, rect.height*2,rect1,null,true,true);File file1 = new File("E:\\mck\\PDF2\\fa\\" + split[split.length - 1] + "-" + i + ".png");ps.add(file1);ImageIO.write(img, "png", file1);}} catch (FileNotFoundException e1) {System.err.println(e1.getLocalizedMessage());} catch (IOException e) {System.err.println(e.getLocalizedMessage());}return ps;}
}