nekohtml经典小例子一个

public class Demo {
public static String TextExtractor(Node root){
   //若是文本节点的话，直接返回
   if (root.getNodeType() == Node.TEXT_NODE) {
    return root.getNodeValue().trim();
   }
   if(root.getNodeType() == Node.ELEMENT_NODE) {
    Element elmt = (Element) root;
    //抛弃脚本
    if (elmt.getTagName().equals("STYLE")
      || elmt.getTagName().equals("SCRIPT"))
     return "";
   
    NodeList children = elmt.getChildNodes();
    StringBuilder text = new StringBuilder();
    for (int i = 0; i < children.getLength(); i++) {
     text.append(TextExtractor(children.item(i)));
    }
    return text.toString();
   }
   //对其它类型的节点，返回空值
   return "";
}
public static void main(String[] args) throws Exception{
   //生成html parser
   DOMParser parser = new DOMParser();
   //设置网页的默认编码
   parser.setProperty(
     "http://cyberneko.org/html/properties/default-encoding",
     "gb18030");
   //input file
   BufferedReader in = new BufferedReader(new FileReader("input.htm"));
   parser.parse(new InputSource(in));
   Document doc = parser.getDocument();
   //获得body节点，以此为根，计算其文本内容
   Node body = doc.getElementsByTagName("BODY").item(0);
   System.out.println(TextExtractor(body));
}
}