xpath 解析xml 不是万能的，有时候xpath是不行的
@Test
public void dom4jXpath() throws DocumentException, ParserConfigurationException, SAXException, IOException, TransformerException{
// DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
// DocumentBuilder db = builderFactory.newDocumentBuilder();
//
// Node contextNode = db.parse(new File("contentNew.html"));
// NodeList a = XPathAPI.selectNodeList(contextNode , "/html/body/div[2]/table[2]/tbody/tr/td[2]/table/tbody/tr/td/table/tbody/tr[2]/td/table/tbody");
// System.out.println(a.getLength());
SAXReader reader = new SAXReader();
Document document = reader.read(new File("oks.html"));
// System.out.println(document.asXML());
// System.out.println(document.asXML());
// XPath path = DocumentHelper.createXPath("/html/body");
// List<Element> elements = path.selectNodes(document);
// List<Element> elements = document.selectNodes("//td[@align='left']");
List<Element> elements = document.selectNodes("/html/body/div/table[2]/tbody/tr/td[2]/table/tbody/tr/td/table/tbody/tr[2]/td/table/tbody/tr/td[2]/a");
for(Element element :elements){
System.out.println(element.asXML());
}
System.out.println(elements.size());
// findLinks(document);
}
说明：
1，上面的api是dom4j 和 apache.xpath实现，因为在 dom4j 取不出火狐生成的 xpath路径时，我怀疑是不是dom4j对xpath实现有问题，但是apache的实现也没有让我有多少惊喜
2，oks.html在附件中提供
上面是一片支离破碎的代码，很不美观，但是却记录着 xpath 对我的困惑。
说一下我的困惑，看看有没有大侠可以给解决下：
我要取得数据就是xpath 为
/html/body/div/table[2]/tbody/tr/td[2]/table/tbody/tr/td/table/tbody/tr[2]/td/table/tbody/tr/td[2]/a
的列表，但是真的取不出来，最后自己写了个xpath //td[@align='left'] 可以取出来了，很疑惑
不能上传文件，把oks.html内容放着了
<?xml version="1.0" encoding="utf-8" standalone="no"?>
<html xmlns="">
<head>
<meta content="HTML Tidy for Java (vers. 27 九月 2004), see www.w3.org" name="generator"/>
<meta content="IE=EmulateIE7" http-equiv="X-UA-Compatible"/>
<base id="basePath" href="/"/>
<script type="text/javascript" language="javascript">
if(navigator.userAgent.indexOf("MSIE")>0) {
var base=document.getElementById('basePath');
var basehref=window.location.href;
var fix=basehref.indexOf('/',8);
base.href=basehref.substring(0,fix)+base.href;
}
</script>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type"/>
<meta content="中国·汤阴" name="sitename"/>
<meta content="http://www.tangyin.gov.cnroot" name="siteurl"/>
<meta content="岳飞故里网，中国汤阴，岳飞，岳飞故里，汤阴网，周易，周文王，扁鹊，医药文化之乡，武圣岳飞，文圣周文王，医圣，岳飞庙，羑里城，政府网站，精忠报国，岳武穆王，精忠岳飞，文王庙，岳飞诞辰，岳飞祭祖，岳飞文化节，汤阴县人民政府，汤阴县党政综合门户网站，政府机构，机构信息，机构职能，政府机构职能，汤阴县政府部门，政府组成部门汤阴,财政局,发改委,公安局,卫生局,文广新局,药监局,人社局,环保局,住建局,交通局,安监局,教体局,科技局,农业局,工信局,商务局,民政局,司法局,水务局,国土资源局,统计局,计生委,审计局,政府办,农机局,乡镇部门,城关镇,韩庄镇 ,白营镇,古贤镇,菜元镇,任固镇,五陵镇,瓦岗乡,伏道镇,宜沟镇,其它部门,便民中心,县残联,县城管局,供销合作社,地震办,畜牧兽医,广电总台,市场发展中心,旅游局,史志办,宗教局,粮食局,人防办,群信局,产业集聚区,林业总站,公路局,盐业局，汤阴旅游，安阳旅游，安阳招商，安阳投资，汤阴投资" name="keywords"/>
<meta content="中国.汤阴网(又名岳飞故里网)是汤阴县党政综合门户网站，由中共汤阴县委、汤阴县人民政府主办，汤阴县信息中心承办，是互联网上展示汤阴，外地游客了解汤阴的网上窗口。2013年进行了全新改版和升级，内容更丰富，功能更完善，百姓办事服务功能更加完备..." name="description"/>
<meta content="" name="location"/>
<meta content="首页" name="channel"/>
<title>中国·汤阴</title>
<link type="text/css" rel="stylesheet" href="css/01.css" id="indexcss"/>
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</head>
<body>
<font style="display:none">
<script src="js/language.js" type="text/javascript" language="JavaScript"/>
</font><script src="js/jquery.pagination.js" type="text/javascript"/>
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function formsubmit(){
if (document.search.cicontentIndex.value == "") {
alert("请输入关键字");
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return false;
}
}
</script>
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$(".scrollBar_top").css('background', 'url(/image/img1/scrollBar_topBg_01.png) center center no-repeat');
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$("#changeStyleTy").empty();
$("#changeStyleTy").append("<img src=\"image/img1/changeStyle_01.jpg\" border=\"0\" onClick=\"changeBGImg('0');\">");
$("#siteMapTy").empty();
$("#siteMapTy").append("<img src=\"image/img1/siteMap_01.jpg\" border=\"0\">");
}
else {
$(".scrollBar_top").css('background', 'url(/image/img1/scrollBar_topBg.png) center center no-repeat');
$(".mainCon").css('background', 'url(/image/img1/main_bg.png) center center repeat-y');
$(".bottom").css('background', 'url(/image/img1/scrollBar_botBg.png) center center no-repeat');
$("#changeStyleTy").empty();
$("#changeStyleTy").append("<img src=\"image/img1/changeStyle.jpg\" border=\"0\" onClick=\"changeBGImg('1');\">");
$("#siteMapTy").empty();
$("#siteMapTy").append("<img src=\"image/img1/siteMap.jpg\" border=\"0\">");
}
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$(document).ready(function(){
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var bg = 'url(/image/img1/head_0' + random_bg + '.jpg) center top no-repeat';
$(".head").css('background', bg);
});
</script>
<div class="mainCon">
<table height="32" align="center" width="994" cellpadding="0" cellspacing="0" border="0" class="topss" style="MARGIN: 0px auto">
<tbody>
<tr>
<td align="center">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tbody>
<tr>
<td align="right" width="26">
<img src="image/img1/positionBtn.jpg"/>
</td>
<td align="left">
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</td>
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<table align="center" width="994" cellpadding="0" cellspacing="0" border="0" style="MARGIN: 0px auto; BACKGROUND: url(image/img1/catagoryList_leftBg.jpg) repeat-y left 50%">
<tbody>
<tr>
<td align="center" width="221" valign="top" style="MARGIN: 0px auto; BACKGROUND: url(image/img1/categoryList_leftBg.jpg) no-repeat center bottom">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tbody>
<tr>
<td>
<table border="0" width="98%" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td>
<table border="0" align="center" width="100%" cellpadding="0" cellspacing="0">
<tbody>
<tr align="center">
<td width="100%" valign="top">
<table border="0" align="center" width="100%" cellpadding="0" cellspacing="0">
<tbody>
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<table border="0" width="100%" cellpadding="0" cellspacing="0" class="tjidaohang">
<tbody>
<tr>
<td dragarea="yes" width="30" align="center">
</td>
<td dragarea="yes" align="left" class="tjidaohangwz">
岳乡快讯
</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td>
<table class="tjilanmu" width="100%" cellspacing="0" cellpadding="0" border="0">
<tr>
<td width="50%" align="left">
<table border="0" width="100%" cellpadding="0" cellspacing="0" height="30">
<tbody>
<tr>
<td style="padding-left:10px;" align="left">
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</td>
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<tbody>
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<td style="padding-left:10px;" align="left">
<a href="viewCmsCac.do?cacId=ff8080813f3c6d4c013f7a4ecc7e01ea" title="政府部门" class="tjilanmuwz">· 政府部门</a>
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<tr>
<td width="50%" align="left">
<table border="0" width="100%" cellpadding="0" cellspacing="0" height="30">
<tbody>
<tr>
<td style="padding-left:10px;" align="left"/>
</tr>
</tbody>
</table>
</td>
<td width="50%" align="left">
<table border="0" width="100%" cellpadding="0" cellspacing="0" height="30">
<tbody>
<tr>
<td style="padding-left:10px;" align="left"/>
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</td>
<td align="left" valign="top" bgcolor="#ffffff">
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<tr>
<td align="center">
<table border="0" align="center" width="100%" cellpadding="0" cellspacing="0">
<tr>
<td class="xin1zuo">
<table border="0" width="100%" cellpadding="0" cellspacing="0">
<tr>
<td dragarea="yes" width="40">
</td>
<td dragarea="yes" align="left" class="whitelanmu">
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<td width="80" align="center"/>
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<td class="xin1you">
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