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Java > Open Source Codes > org > pdfbox > examples > util > ExtractTextByArea


1 /**
2  * Copyright (c) 2005, www.pdfbox.org
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  * this list of conditions and the following disclaimer in the documentation
12  * and/or other materials provided with the distribution.
13  * 3. Neither the name of pdfbox; nor the names of its
14  * contributors may be used to endorse or promote products derived from this
15  * software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  * http://www.pdfbox.org
29  *
30  */
31 package org.pdfbox.examples.util;
32
33 import org.pdfbox.exceptions.InvalidPasswordException;
34
35 import org.pdfbox.pdmodel.PDDocument;
36 import org.pdfbox.pdmodel.PDPage;
37 import org.pdfbox.util.PDFTextStripperByArea;
38
39 import java.awt.Rectangle JavaDoc;
40
41 import java.util.List JavaDoc;
42
43 /**
44  * This is an example on how to extract text from a specific area on the PDF document.
45  *
46  * Usage: java org.pdfbox.examples.util.ExtractTextByArea <input-pdf>
47  *
48  * @author <a HREF="mailto:ben@benlitchfield.com">Ben Litchfield</a>
49  * @version $Revision: 1.2 $
50  */
51 public class ExtractTextByArea
52 {
53     private ExtractTextByArea()
54     {
55         //utility class and should not be constructed.
56 }
57     
58     
59     /**
60      * This will print the documents text in a certain area.
61      *
62      * @param args The command line arguments.
63      *
64      * @throws Exception If there is an error parsing the document.
65      */
66     public static void main( String JavaDoc[] args ) throws Exception JavaDoc
67     {
68         if( args.length != 1 )
69         {
70             usage();
71         }
72         else
73         {
74             PDDocument document = null;
75             try
76             {
77                 document = PDDocument.load( args[0] );
78                 if( document.isEncrypted() )
79                 {
80                     try
81                     {
82                         document.decrypt( "" );
83                     }
84                     catch( InvalidPasswordException e )
85                     {
86                         System.err.println( "Error: Document is encrypted with a password." );
87                         System.exit( 1 );
88                     }
89                 }
90                 PDFTextStripperByArea stripper = new PDFTextStripperByArea();
91                 stripper.setSortByPosition( true );
92                 Rectangle JavaDoc rect = new Rectangle JavaDoc( 10, 280, 275, 60 );
93                 stripper.addRegion( "class1", rect );
94                 List JavaDoc allPages = document.getDocumentCatalog().getAllPages();
95                 PDPage firstPage = (PDPage)allPages.get( 0 );
96                 stripper.extractRegions( firstPage );
97                 System.out.println( "Text in the area:" + rect );
98                 System.out.println( stripper.getTextForRegion( "class1" ) );
99                 
100             }
101             finally
102             {
103                 if( document != null )
104                 {
105                     document.close();
106                 }
107             }
108         }
109     }
110
111     /**
112      * This will print the usage for this document.
113      */
114     private static void usage()
115     {
116         System.err.println( "Usage: java org.pdfbox.examples.util.ExtractTextByArea <input-pdf>" );
117     }
118
119 }
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