pdf转图片、提取pdf文本、提取pdf图片

	package com.midevip.common.util;
	import com.itextpdf.text.pdf.PdfReader;
	import net.coobird.thumbnailator.Thumbnails;
	import org.apache.pdfbox.cos.COSName;
	import org.apache.pdfbox.pdmodel.*;
	import org.apache.pdfbox.pdmodel.encryption.AccessPermission;
	import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
	import org.apache.pdfbox.rendering.PDFRenderer;
	import org.apache.pdfbox.text.PDFTextStripper;
	import javax.imageio.IIOImage;
	import javax.imageio.ImageIO;
	import javax.imageio.ImageWriteParam;
	import javax.imageio.ImageWriter;
	import java.awt.image.BufferedImage;
	import java.io.File;
	import java.io.IOException;
	import java.io.InputStream;
	import java.text.SimpleDateFormat;
	import java.util.Calendar;
	import java.util.Iterator;
	/**
	* 使用pdfbox提取pdf文档的文字和图片内容
	* pdfbox官网：https://pdfbox.apache.org/
	* maven依赖如下：
	* <dependency>
	* <groupId>org.apache.pdfbox</groupId>
	* <artifactId>fontbox</artifactId>
	* <version>2.0.1</version>
	* </dependency>
	* <dependency>
	* <groupId>org.apache.pdfbox</groupId>
	* <artifactId>pdfbox</artifactId>
	* <version>2.0.1</version>
	* </dependency>
	* <dependency>
	* <groupId>com.itextpdf</groupId>
	* <artifactId>itextpdf</artifactId>
	* <version>5.5.13</version>
	* </dependency>
	* <dependency>
	* <groupId>net.coobird</groupId>
	* <artifactId>thumbnailator</artifactId>
	* <version>0.4.8</version>
	* </dependency>
	*/
	public class PdfTest {
	public static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
	/**
	*
	*
	* @param pdfFilePath
	* @throws Exception
	*/
	public static void extractText(String pdfFilePath) throws Exception{
	try (PDDocument document = PDDocument.load(new File(pdfFilePath)))
	{
	AccessPermission ap = document.getCurrentAccessPermission();
	if (!ap.canExtractContent())
	{
	throw new IOException("You do not have permission to extract text");
	}
	PDFTextStripper stripper = new PDFTextStripper();
	stripper.setSortByPosition(true);
	for (int p = 1; p <= document.getNumberOfPages(); ++p)
	{
	// 这里分为一页一页的提取，如果不设置，默认会把所有页的内容一次性提取出来，根据需要选择
	stripper.setStartPage(p);
	stripper.setEndPage(p);
	//提取内容就这一行代码
	//提取内容很彻底，包括了页眉页脚的内容也都会被提出来
	String text = stripper.getText(document);
	String pageStr = String.format("page %d:", p);
	System.out.println(pageStr);
	//为了打印出来更美观
	for (int i = 0; i < pageStr.length(); ++i)
	{
	System.out.print("-");
	}
	System.out.println();
	System.out.println(text.trim());
	System.out.println();
	}
	}
	}
	public static void pdfParse(String pdfPath) throws Exception {
	InputStream input = null;
	PDDocument document = null;
	try {
	document = PDDocument.load(new File(pdfPath));
	/** 文档属性信息 **/
	PDDocumentInformation info = document.getDocumentInformation();
	System.out.println("标题:" + info.getTitle());
	System.out.println("主题:" + info.getSubject());
	System.out.println("作者:" + info.getAuthor());
	System.out.println("关键字:" + info.getKeywords());
	System.out.println("应用程序:" + info.getCreator());
	System.out.println("pdf 制作程序:" + info.getProducer());
	System.out.println("作者:" + info.getTrapped());
	System.out.println("创建时间:" + dateFormat(info.getCreationDate()));
	System.out.println("修改时间:" + dateFormat(info.getModificationDate()));
	//获取内容信息
	PDFTextStripper pts = new PDFTextStripper();
	String content = pts.getText(document);
	System.out.println("内容:" + content);
	/** 文档页面信息 **/
	PDDocumentCatalog cata = document.getDocumentCatalog();
	int count = 1;
	for (int i = 0; i < document.getNumberOfPages(); i++) {
	PDPage page = document.getPage(i);
	if (null != page) {
	//获取到所有rescourse信息
	PDResources res = page.getResources();
	Iterable<COSName> xit = res.getXObjectNames();
	Iterator<COSName> iterator = xit.iterator();
	while (iterator.hasNext()){
	COSName cosName = iterator.next();
	System.out.println(cosName.getName());
	//判断是否图片资源，这个提取图片也很彻底，包括页眉页脚的图片也会被获取到
	if(res.isImageXObject(cosName)){
	PDImageXObject pdImageXObject = (PDImageXObject)res.getXObject(cosName);
	//这里保存图片我用了谷歌的thumbnailator框架，也可以用自己的方法去保存BufferedImage对象到本地图片
	Thumbnails.of(pdImageXObject.getImage()).scale(0.9).toFile(new File("D:\\pdf\\"+System.currentTimeMillis()+".jpg"));
	}
	}
	}
	}
	} catch (Exception e) {
	throw e;
	} finally {
	if (null != input)
	input.close();
	if (null != document)
	document.close();
	}
	}
	/***
	* PDF文件转PNG图片，全部页数
	*
	* @param PdfFilePath pdf完整路径
	* @param dpi dpi越大转换后越清晰，相对转换速度越慢
	* @return
	*/
	private static boolean pdf2Image(String PdfFilePath, String dstImgFolder, int dpi) {
	File file = new File(PdfFilePath);
	PDDocument pdDocument;
	try {
	String imgPDFPath = file.getParent();
	int dot = file.getName().lastIndexOf('.');
	String imagePDFName = file.getName().substring(0, dot); // 获取图片文件名
	String imgFolderPath = null;
	if (dstImgFolder.equals("")) {
	imgFolderPath = imgPDFPath + File.separator + imagePDFName;// 获取图片存放的文件夹路径
	} else {
	imgFolderPath = dstImgFolder + File.separator + imagePDFName;
	}
	if (createDirectory(imgFolderPath)) {
	pdDocument = PDDocument.load(file);
	PDFRenderer renderer = new PDFRenderer(pdDocument);
	/* dpi越大转换后越清晰，相对转换速度越慢 */
	PdfReader reader = new PdfReader(PdfFilePath);
	int pages = reader.getNumberOfPages();
	StringBuffer imgFilePath = null;
	for (int i = 0; i < pages; i++) {
	String imgFilePathPrefix = imgFolderPath + File.separator + imagePDFName;
	imgFilePath = new StringBuffer();
	imgFilePath.append(imgFilePathPrefix);
	imgFilePath.append("_");
	imgFilePath.append(String.valueOf(formatNumber(i+1)));
	imgFilePath.append(".jpg");
	File dstFile = new File(imgFilePath.toString());
	BufferedImage image = renderer.renderImageWithDPI(i, dpi);
	ImageWriter writer = ImageIO.getImageWritersByFormatName("jpg").next();
	writer.setOutput(ImageIO.createImageOutputStream(dstFile));
	ImageWriteParam param = writer.getDefaultWriteParam();
	param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
	param.setCompressionQuality(0.3f);
	writer.write(null, new IIOImage(image, null, null), param);
	// ImageIO.write(image, "jpg", dstFile);
	}
	System.out.println("PDF文档转图片成功！"+dstImgFolder);
	return true;
	} else {
	System.out.println("PDF文档转图片失败：" + "创建" + imgFolderPath + "失败");
	}
	} catch (IOException e) {
	e.printStackTrace();
	}
	return false;
	}
	private static String formatNumber(int i){
	if(i<10){
	return "00"+i;
	}else if(i<100){
	return "0"+i;
	}else{
	return i+"";
	}
	}
	private static boolean createDirectory(String folder) {
	File dir = new File(folder);
	if (dir.exists()) {
	return true;
	} else {
	return dir.mkdirs();
	}
	}
	public static String dateFormat(Calendar calendar) throws Exception {
	if (null == calendar)
	return null;
	String date = null;
	try {
	String pattern = DATE_FORMAT;
	SimpleDateFormat format = new SimpleDateFormat(pattern);
	date = format.format(calendar.getTime());
	} catch (Exception e) {
	throw e;
	}
	return date == null ? "" : date;
	}
	}