如何使用 Java 从 HTML 文档中提取内容

问题描述

如何使用 Java 从 HTML 文档中提取内容。

解决方案

以下是使用 Java 从 HTML 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.parser.html.HtmlParser;
import org.apache.tika.sax.BodyContentHandler;
import org.xml.sax.SAXException;

public class ExtractContentFromHTMLDoc {
   public static void main(String[] args) throws IOException,SAXException, TikaException {

      //检测文件类型
      BodyContentHandler handler = new BodyContentHandler();
      
      Metadata metadata = new Metadata();
      FileInputStream inputstream = new FileInputStream(new File(
         "C:/tika/htmlExample.html"));
      ParseContext pcontext = new ParseContext();

      //Html解析器
      HtmlParser htmlparser = new HtmlParser();
      
      htmlparser.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:Sheet1 
   ID   NAME     BRANCH     PERCENTAGE       EMAIL 
   1     Ram       IT          85         ram123@gmail.com 
   2    Rahim      EEE         95         rahim123@gmail.com 
   3    Robert     ECE         90         robert123@gmail.com  
   
Metadata of the document: 
Content-Encoding:   windows-1252 Content-Type:   text/html; charset=windows-1252