java用Filter模式过滤解析html

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需要两个包htmllexer.jar和htmlparser.jar

实例源码

import org.htmlparser.Node;import org.htmlparser.NodeFilter;import org.htmlparser.Parser;import org.htmlparser.filters.AndFilter;import org.htmlparser.filters.HasChildFilter;import org.htmlparser.filters.TagNameFilter;import org.htmlparser.http.ConnectionManager;import org.htmlparser.lexer.Page;import org.htmlparser.util.NodeIterator;import org.htmlparser.util.NodeList;import org.htmlparser.util.ParserException;public class FilterTest {public static void main(String[] args){ConnectionManager manager;try{manager = Page.getConnectionManager();Parser parser = new Parser(manager.openConnection("http://www.hzau.edu.cn"));parser.setEncoding("utf-8");//AndFilter 接受所有同时满足2个Filter的节点//HasChildFilter接受所有子节点符合该Filter的节点//TagNameFilter接受所有满足Tag名的Tag NodesNodeFilter filter = new AndFilter(new TagNameFilter("a"),new HasChildFilter(new TagNameFilter("img")));//System.out.println(filter);NodeList nodelist = parser.parse(filter);//System.out.println(nodelist);//NodeIterator访问所有节点NodeIterator it= nodelist.elements();//System.out.println(it);while(it.hasMoreNodes()){Node node = (Node)it.nextNode();System.out.println(node.toHtml());}}catch(ParserException e){e.printStackTrace();}}}

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