pdfbox 解析pdf里的图片和文字

package com.test.read; import java.io.File; import java.io.IOException; import java.util.Iterator; import java.util.List; import java.util.Map; import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage; import org.apache.pdfbox.pdmodel.PDResources; import org.apache.pdfbox.pdmodel.encryption.AccessPermission; import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectImage; /** * This will read a read pdf and extract images. <br/><br/> * * usage: java org.apache.pdfbox.ExtractImages &lt;pdffile&gt; &lt;password&gt; [imageprefix] * * @author <a href="mailto:[email protected]">Ben Litchfield</a> * @version $Revision: 1.7 $ */ public class ExtractImages { private int imageCounter = 1; private static final String PASSWORD = "-password"; private static final String PREFIX = "-prefix"; private ExtractImages() { } /** * This is the entry point for the application. * * @param args The command-line arguments. * * @throws Exception If there is an error decrypting the document. */ public static void main( String[] args ) throws Exception { ExtractImages extractor = new ExtractImages(); String []strs={"",""}; extractor.extractImages(strs); } private void extractImages( String[] args ) throws Exception { if( args.length < 1 || args.length > 3 ) { usage(); } else { String pdfFile = "E://123.pdf"; String password = ""; String prefix = null; for( int i=0; i<args.length; i++ ) { if( args[i].equals( PASSWORD ) ) { i++; if( i >= args.length ) { usage(); } password = args[i]; } else if( args[i].equals( PREFIX ) ) { i++; if( i >= args.length ) { usage(); } prefix = args[i]; } else { if( pdfFile == null ) { pdfFile = args[i]; } } } if(pdfFile == null) { usage(); } else { if( prefix == null && pdfFile.length() >4 ) { prefix = pdfFile.substring( 0, pdfFile.length() -4 ); } PDDocument document = null; try { document = PDDocument.load( pdfFile ); if( document.isEncrypted() ) { // StandardDecryptionMaterial spm = new StandardDecryptionMaterial(password); // document.openProtection(spm); AccessPermission ap = document.getCurrentAccessPermission(); if( ! ap.canExtractContent() ) { throw new IOException( "Error: You do not have permission to extract images." ); } } List pages = document.getDocumentCatalog().getAllPages(); Iterator iter = pages.iterator(); while( iter.hasNext() ) { PDPage page = (PDPage)iter.next(); PDResources resources = page.getResources(); Map images = resources.getImages(); if( images != null ) { Iterator imageIter = images.keySet().iterator(); while( imageIter.hasNext() ) { String key = (String)imageIter.next(); PDXObjectImage image = (PDXObjectImage)images.get( key ); String name = getUniqueFileName( key, image.getSuffix() ); System.out.println( "Writing image:" + name ); // PDStream pdfstream=image.getPDStream(); image.write2file("D:\\"+name); } } } } finally { if( document != null ) { document.close(); } } } } } private String getUniqueFileName( String prefix, String suffix ) { String uniqueName = null; File f = null; while( f == null || f.exists() ) { uniqueName = prefix + "-" + imageCounter; f = new File( uniqueName + "." + suffix ); imageCounter++; } return uniqueName; } /** * This will print the usage requirements and exit. */ private static void usage() { System.err.println( "Usage: java org.apache.pdfbox.ExtractImages [OPTIONS] <PDF file>\n" + " -password <password> Password to decrypt document\n" + " -prefix <image-prefix> Image prefix(default to pdf name)\n" + " <PDF file> The PDF document to use\n" ); System.exit( 1 ); } }