java使用htmlparser提取网页纯文本例子

复制代码 代码如下:
package com.test;

import org.htmlparser.Node;
import org.htmlparser.NodeFilter;
import org.htmlparser.Parser;
import org.htmlparser.filters.TagNameFilter;
import org.htmlparser.tags.TableTag;
import org.htmlparser.util.NodeList;

public class TestHTMLParser {
  public static void testHtml() {
    try {
        String sCurrentLine;
        String sTotalString;
        sCurrentLine = "";
        sTotalString = "";
        java.io.InputStream l_urlStream;
        java.net.URL l_url = new java.net.URL("http://www.ideagrace.com/html/doc/2006/07/04/00929.html");
        java.net.HttpURLConnection l_connection = (java.net.HttpURLConnection) l_url.openConnection();
        l_connection.connect();
        l_urlStream = l_connection.getInputStream();
        java.io.BufferedReader l_reader = new java.io.BufferedReader(new java.io.InputStreamReader(l_urlStream));
        while ((sCurrentLine = l_reader.readLine()) != null) {
          sTotalString += sCurrentLine+"/r/n";
        //  System.out.println(sTotalString);
        }
        String testText = extractText(sTotalString);
        System.out.println( testText );

    } catch (Exception e) {
        e.printStackTrace();
    }

  }

  public static String extractText(String inputHtml) throws Exception {
    StringBuffer text = new StringBuffer();
    Parser parser = Parser.createParser(new String(inputHtml.getBytes(),"GBK"), "GBK");
    // 遍历所有的节点
    NodeList nodes = parser.extractAllNodesThatMatch(new NodeFilter() {
        public boolean accept(Node node) {
          return true;
        }
    });

    System.out.println(nodes.size()); //打印节点的数量
    for (int i=0;i         Node nodet = nodes.elementAt(i);
         //System.out.println(nodet.getText());
        text.append(new String(nodet.toPlainTextString().getBytes("GBK"))+"/r/n");         
    }
    return text.toString();
  }

  public static void test5(String resource) throws Exception {
    Parser myParser = new Parser(resource);
    myParser.setEncoding("GBK");
    String filterStr = "table";
    NodeFilter filter = new TagNameFilter(filterStr);
    NodeList nodeList = myParser.extractAllNodesThatMatch(filter);
    TableTag tabletag = (TableTag) nodeList.elementAt(11);

  }

  public static void main(String[] args) throws Exception {
    // test5("http://www.google.com");
    testHtml();
  }
}