如何使用 Java 从文本文档中提取内容

问题描述

如何使用 Java 从文本文档中提取内容。

解决方案

以下是使用 Java 从文本文档中提取内容的程序。

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.sax.BodyContentHandler;
import org.apache.tika.parser.txt.TXTParser;
import org.xml.sax.SAXException;

public class ExtractContentFromTextDoc {
   public static void main(String[] args) throws Exception {
         
      //检测文件类型
      BodyContentHandler handler = new BodyContentHandler();
      
      Metadata metadata = new Metadata();
      FileInputStream inputstream = new FileInputStream(new File(
         "C:/tika/textExample.txt"));
      ParseContext pcontext = new ParseContext();

      //文本文档解析器
      TXTParser  TexTParser = new TXTParser();
      
      TexTParser.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

输出

Contents of the document: Tutorials Point 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: 
Content-Encoding : windows-1252 
Content-Type : text/plain; charset = windows-1252