从 ODF 文件中提取内容的Java程序

ODF 的全部内容是 Open Document Format。它是一个国际标准系列，是常用的已弃用供应商特定文档格式（如 .doc、.wpd、.xls ）的继承者。与其他格式相比，ODF 文档更小。 OpenDocumentParser 类用于从 TIKA 库中提取 ODF 文件中的内容。

使用的方法：

1. BodyContentHandler()：它创建一个将 XHTML 正文字符事件写入内部字符串缓冲区的内容处理程序。
2. Metadata() ：它构造新的空元数据。
3. ParseContext()：它创建一个解析上下文对象，用于将上下文信息传递给 Tika 解析器。
4. parse()：实例化解析器对象，并调用解析方法。

以下是执行以下Java代码所需的依赖项：

tika-parsers-1.24.1.jar
commons-io-2.8.0.jar
slf4j-api-2.0.0-alpha0.jar

执行：

Java

// Java Program to Extract Content from a ODF file
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;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import sun.security.util.Length;
 
public class OdfContentExtractor {
    public static void main(String[] args)
    {
 
        try {
            BodyContentHandler handler
                = new BodyContentHandler();
 
            Metadata metadata = new Metadata();
 
            // Here .odt is open document text format.
            FileInputStream inputstream
                = new FileInputStream(
                    new File("F:\\geeks.odt"));
            ParseContext parsecontent = new ParseContext();
 
            // Parsing the open document.
            OpenDocumentParser opendocumentparser
                = new OpenDocumentParser();
 
            // Passing the InputStream , ContentHandler,
            // Metadata , ParseContext to the parse method.
            opendocumentparser.parse(inputstream, handler,
                                     metadata,
                                     parsecontent);
            System.out.println("Content in the document :"
                               + handler.toString());
 
            // Displaying the metadata of the odf file.
            System.out.println("Metadata of the document:");
            String[] metaName = metadata.names();
            int l = metaName.length;
            for (int i = 0; i < l; i++) {
                System.out.println(
                    metaName[i]
                    + " : =  " + metadata.get(metaName[i]));
            }
        }
        catch (Exception e) {
 
            System.out.println(
                "failed to extract content due to " + e);
        }
    }
}

输出：

Content in the document :Geekforgeeks has a great content on DSA.

Metadata of the document:
date : =  2020-11-21T05:38:00Z
meta:paragraph-count : =  1
meta:word-count : =  6
meta:initial-author : =  Mohan Sai
initial-creator : =  Mohan Sai
dc:creator : =  Mohan Sai
generator : =  MicrosoftOffice/15.0 MicrosoftWord
Word-Count : =  6
dcterms:created : =  2020-11-21T05:36:00Z
dcterms:modified : =  2020-11-21T05:38:00Z
Last-Modified : =  2020-11-21T05:38:00Z
nbPara : =  1
Last-Save-Date : =  2020-11-21T05:38:00Z
meta:character-count : =  40
Paragraph-Count : =  1
meta:save-date : =  2020-11-21T05:38:00Z
modified : =  2020-11-21T05:38:00Z
Edit-Time : =  PT0S
nbCharacter : =  40
nbPage : =  1
nbWord : =  6
Content-Type : =  application/vnd.oasis.opendocument.text
creator : =  Mohan Sai
meta:author : =  Mohan Sai
meta:creation-date : =  2020-11-21T05:36:00Z
Creation-Date : =  2020-11-21T05:36:00Z
xmpTPg:NPages : =  1
Character Count : =  40
editing-cycles : =  3
Page-Count : =  1
Author : =  Mohan Sai
meta:page-count : =  1