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3. 如何使用java从HTML文档中提取内容。(How to extract content from an HTML document using java.)

如何使用java从HTML文档中提取内容。(How to extract content from an HTML document using java.)

问题描述 (Problem Description)

如何使用java从HTML文档中提取内容。

解决方案 (Solution)

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 {
      //detecting the file type
      BodyContentHandler handler = new BodyContentHandler();
      Metadata metadata = new Metadata();
      FileInputStream inputstream = new FileInputStream(new File(
         "C:/tika/htmlExample.html"));
      ParseContext pcontext = new ParseContext();
      //Html parser
      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 (Input)

输出 (Output)

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