TIKA - 提取 PDF

下面给出的是从 PDF 中提取内容和元数据的程序。

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.pdf.PDFParser;
import org.apache.tika.sax.BodyContentHandler;

import org.xml.sax.SAXException;

public class PdfParse {

   public static void main(final String[] args) throws IOException,TikaException {

      BodyContentHandler handler = new BodyContentHandler();
      Metadata metadata = new Metadata();
      FileInputStream inputstream = new FileInputStream(new File("Example.pdf"));
      ParseContext pcontext = new ParseContext();
      
      //使用 PDF 解析器解析文档
      PDFParser pdfparser = new PDFParser(); 
      pdfparser.parse(inputstream, handler, metadata,pcontext);
      
      //获取文档的内容
      System.out.println("Contents of the PDF :" + handler.toString());
      
      //获取文档的元数据
      System.out.println("Metadata of the PDF:");
      String[] metadataNames = metadata.names();
      
      for(String name : metadataNames) {
         System.out.println(name+ " : " + metadata.get(name));
      }
   }
}

将上述代码保存为 PdfParse.java，并使用以下命令从命令提示符编译它 −

javac PdfParse.java
java PdfParse

下面给出的是 example.pdf 的快照

我们传递的 PDF 具有以下属性 −

编译程序后，您将获得如下所示的输出。

输出 −

PDF 的内容:

Apache Tika is a framework for content type detection and content extraction 
which was designed by Apache software foundation. It detects and extracts metadata 
and structured text content from different types of documents such as spreadsheets, 
text documents, images or PDFs including audio or video input formats to certain extent.

PDF 的元数据:

dcterms:modified :     2014-09-28T12:31:16Z
meta:creation-date :     2014-09-28T12:31:16Z
meta:save-date :     2014-09-28T12:31:16Z
dc:creator :     Krishna Kasyap
pdf:PDFVersion :     1.5
Last-Modified :     2014-09-28T12:31:16Z
Author :     Krishna Kasyap
dcterms:created :     2014-09-28T12:31:16Z
date :     2014-09-28T12:31:16Z
modified :     2014-09-28T12:31:16Z
creator :     Krishna Kasyap
xmpTPg:NPages :     1
Creation-Date :     2014-09-28T12:31:16Z
pdf:encrypted :     false
meta:author :     Krishna Kasyap
created :     Sun Sep 28 05:31:16 PDT 2014
dc:format :     application/pdf; version = 1.5
producer :     Microsoft® Word 2013
Content-Type :     application/pdf
xmp:CreatorTool :     Microsoft® Word 2013
Last-Save-Date :     2014-09-28T12:31:16Z