下面给出的程序是用来提取PDF文件内容和元数据。

importjava.io.File;importjava.io.FileInputStream;importjava.io.IOException;importorg.apache.tika.exception.TikaException;importorg.apache.tika.metadata.Metadata;importorg.apache.tika.parser.ParseContext;importorg.apache.tika.parser.pdf.PDFParser;importorg.apache.tika.sax.BodyContentHandler;importorg.xml.sax.SAXException;publicclassPdfParse{publicstaticvoidmain(finalString[]args')throwsIOException,TikaException{BodyContentHandlerhandler=newBodyContentHandler();Metadatametadata=newMetadata();FileInputStreaminputstream=newFileInputStream(newFile("Example.pdf"));ParseContextpcontext=newParseContext();//parsing the document using PDF parserPDFParserpdfparser=newPDFParser();pdfparser.parse(inputstream,handler,metadata,pcontext);//getting the content of the documentSystem.out.println("Contents of the PDF :"+handler.toString());//getting metadata of the documentSystem.out.println("Metadata of the PDF:");String[]metadataNames=metadata.names();for(Stringname:metadataNames){System.out.println(name+" : "+metadata.get(name));}}}

保存上述代码保存为PdfParse.java，并通过使用下面的命令从命令提示编译：

javacPdfParse.java javaPdfParse

下面给出的是Example.pdf文件的快照：

PDF文档具有以下属性：

执行上述程序后，会得到如下的输出

输出:

Contents of the PDF: 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. Metadata of the PDF: 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

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