如何使用java从PDF中提取内容。（How to extract content from an ODF using java.）

问题描述 (Problem Description)

如何使用java从ODF中提取内容。

解决方案 (Solution)

以下是使用java从ODF中提取内容的程序。

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.odf.OpenDocumentParser;
import org.apache.tika.sax.BodyContentHandler;
import org.xml.sax.SAXException;
public class ExtractContentFromODF {
   public static void main(String[] args) throws Exception {
      //detecting the file type
      BodyContentHandler handler = new BodyContentHandler();
      Metadata metadata = new Metadata();
      FileInputStream inputstream = new FileInputStream(new File(
         "C:/tika/odfExample.odt"));
      ParseContext pcontext = new ParseContext();
      //Open Document Parser
      OpenDocumentParser openofficeparser = new OpenDocumentParser ();
      openofficeparser.parse(inputstream, handler, metadata,pcontext);
      System.out.println("Contents of the document:" + handler.toString());
      System.out.println("Metadata of the document:");
      String[] metadataNames = metadata.names();
      for(String name : metadataNames) {
         System.out.println(name + " :  " + metadata.get(name));
      }
   }
}

输入 (Input)

输出 (Output)

Contents of the document: xnip originated from the idea that there exists a 
class of readers who respond better to online content and prefer to learn new skills 
at their own pace from the comforts of their drawing rooms. 
The journey commenced with a single tutorial on HTML in 2006 and elated by the response 
it generated, we worked our way to adding fresh tutorials to our repository which now 
proudly flaunts a wealth of tutorials and allied articles on topics ranging from 
programming languages to web designing to academics and much more.  
Metadata of the document: 
date :  2017-05-19T09:03:00Z 
meta:paragraph-count :  1 
meta:word-count :  78 
meta:initial-author :  krishnakasyap Bhagavatula 
initial-creator :  krishnakasyap Bhagavatula 
dc:creator :  krishnakasyap Bhagavatula 
generator :  MicrosoftOffice/15.0 MicrosoftWord 
Word-Count :  78 
dcterms:created :  2017-05-19T09:03:00Z 
dcterms:modified :  2017-05-19T09:03:00Z 
Last-Modified :  2017-05-19T09:03:00Z 
nbPara :  1 
Last-Save-Date :  2017-05-19T09:03:00Z 
meta:character-count :  528 
Paragraph-Count :  1 
meta:save-date :  2017-05-19T09:03:00Z 
modified :  2017-05-19T09:03:00Z 
Edit-Time :  PT0S 
nbCharacter :  528 
nbPage :  1 
nbWord :  78 
Content-Type :  application/vnd.oasis.opendocument.text 
creator :  krishnakasyap Bhagavatula 
meta:author :  krishnakasyap Bhagavatula 
meta:creation-date :  2017-05-19T09:03:00Z 
Creation-Date :  2017-05-19T09:03:00Z 
xmpTPg:NPages :  1 
Character Count :  528 
editing-cycles :  2
Page-Count :  1 
Author :  krishnakasyap Bhagavatula 
meta:page-count :  1