html分析器——jericho-html-3.3分解table

时间:2021-12-13 07:23:28

原部分来自Internet上的其他博客,只是因为很长一段时间。忘了谁是参考,这里说声抱歉。。

先贴一些html页:

<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=GBK">
<title>HTML Parser</title>
<meta name="generator" content="Namo WebEditor">
</head>
<body>
<table width=620 border=0 cellpadding=1 cellspacing=0 bgcolor=#0066cc>
<tr>
<td width=100%>
<table width=100% border=0 cellpadding=4 cellspacing=0 bgcolor=#D3E5FB>
<tr bgcolor=#D3E5FB>
<td width=20%><font size="2" face="Arial,Verdana"><b>想学习
Name</b></font><br>
</td>
<td width=13%><font size="2" face="Arial,Verdana"><b>Result</b></font><br>
</td>
<td width=8%><font size="2" face="Arial,Verdana"><b>Time</b></font><br>
</td>
<td width=59%><font size="2" face="Arial,Verdana"><b>Synopsis</b></font><br>
</td>
</tr>
<tr bgcolor=#eeeeee>
<td width=20%><font size="1" face="Arial,Verdana"><b>9</b>
想学习</font><br>
</td>
<td width=13%><font size="1" face="Arial,Verdana"><font
color=#ff0033>+FAIL</font> <a
href="v4_wireless_802.1x_full/cdrouter_dhcp_20.txt">想学习</a></font><br>
</td>
<td width=8%><font size="1" face="Arial,Verdana">12:31</font><br>
</td>
<td width=59%><font size="1" face="Arial,Verdana">想学习</font><br>
</td>
</tr>
<tr bgcolor=#ffffff>
<td width=20%><font size="1" face="Arial,Verdana"><b>1</b>
cdrouter_basic_1</font><br>
</td>
<td width=13%><font size="1" face="Arial,Verdana">Pass <a
href="v4_wireless_802.1x_full/cdrouter_basic_1.txt">想学习</a></font><br>
</td>
<td width=8%><font size="1" face="Arial,Verdana">00:00</font><br>
</td>
<td width=59%><font size="1" face="Arial,Verdana">想学习</font><br>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>

对于这个页面来说我想取出全部的td里面的文字内容,该怎么办呢。假设用正則表達式,我还真是难以写出正确的,来解析出我所要的结果。

在网上搜索了一下jericho-html-3.3这个插件,用来解析table。的确非常方便。

代码例如以下:

package com.xxx.hbuassys.test;

import java.net.URL;
import java.util.Iterator;
import java.util.List; import net.htmlparser.jericho.Element;
import net.htmlparser.jericho.HTMLElementName;
import net.htmlparser.jericho.Segment;
import net.htmlparser.jericho.Source; public class HtmlParser
{
public static void main(String[] args) throws Exception
{
String sourceUrlString="test.html"; if(sourceUrlString.indexOf(':') == -1)
sourceUrlString ="file:"+sourceUrlString;
Source source=new Source(new URL(sourceUrlString));
List Elements_TABLE=source.getAllElements(HTMLElementName.TABLE);
Elements_TABLE.remove(0);//因为table相互嵌套。我们须要的是第二个,所以删掉第一个
Iterator it_TABLE = Elements_TABLE.iterator();
while(it_TABLE.hasNext())
{
Element Element_TABLE = (Element)it_TABLE.next();
// System.out.println("**"+Element_TABLE.toString()+"\n**");
Segment getContent_TABLE = (Segment)Element_TABLE.getContent();
List Elements_TR = getContent_TABLE.getAllElements(HTMLElementName.TR);
Iterator it_TR = Elements_TR.iterator();
while(it_TR.hasNext())
{
Element Element_TR = (Element)it_TR.next();
Segment getContent_TR = (Segment)Element_TR.getContent();
List Elements_FONT = getContent_TR.getAllElements(HTMLElementName.FONT);
Iterator it_FONT = Elements_FONT.iterator();
int i = 1;
while(it_FONT.hasNext())
{
Element Element_FONT = (Element)it_FONT.next();
Segment getContent_FONT = (Segment)Element_FONT.getContent();
String a1 = getContent_FONT.toString();
System.out.println(i + " = " + Element_FONT.getContent().getTextExtractor().toString());
i++;
}
System.out.println();
}
}
}
}

结果:

1 = 想学习 Name

2 = Result

3 = Time

4 = Synopsis





1 = 9 想学习

2 = +FAIL 想学习

3 = +FAIL

4 = 12:31

5 = 想学习





1 = 1 cdrouter_basic_1

2 = Pass 想学习

3 = 00:00

4 = 想学习





大致的思路就是,先取出全部的table标签,然后对须要的table进行解析,取出里面的tr,在从tr里面取出td这样就能够得到我们须要的内容了。

假设仅仅讲到这,那么就跟网上其它人讲的没有什么差别了。

由于项目的须要,使用此插件发现了一个问题:

假设html页面的编码是UTF-8的格式,那么解析出来的内容就会是乱码。假设直接对这些乱码编码。採用new String(str.getBytes(),"GBK");等之类的操作都不能解决这个问题。本人亲自測试过。

比如html页面变为:

<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=UTF-8">
<title>HTML Parser</title>
<meta name="generator" content="Namo WebEditor">
</head>
<body>
<table width=620 border=0 cellpadding=1 cellspacing=0 bgcolor=#0066cc>
<tr>
<td width=100%>
<table width=100% border=0 cellpadding=4 cellspacing=0 bgcolor=#D3E5FB>
<tr bgcolor=#D3E5FB>
<td width=20%><font size="2" face="Arial,Verdana"><b>想学习
Name</b></font><br>
</td>
<td width=13%><font size="2" face="Arial,Verdana"><b>Result</b></font><br>
</td>
<td width=8%><font size="2" face="Arial,Verdana"><b>Time</b></font><br>
</td>
<td width=59%><font size="2" face="Arial,Verdana"><b>Synopsis</b></font><br>
</td>
</tr>
<tr bgcolor=#eeeeee>
<td width=20%><font size="1" face="Arial,Verdana"><b>9</b>
想学习</font><br>
</td>
<td width=13%><font size="1" face="Arial,Verdana"><font
color=#ff0033>+FAIL</font> <a
href="v4_wireless_802.1x_full/cdrouter_dhcp_20.txt">想学习</a></font><br>
</td>
<td width=8%><font size="1" face="Arial,Verdana">12:31</font><br>
</td>
<td width=59%><font size="1" face="Arial,Verdana">想学习</font><br>
</td>
</tr>
<tr bgcolor=#ffffff>
<td width=20%><font size="1" face="Arial,Verdana"><b>1</b>
cdrouter_basic_1</font><br>
</td>
<td width=13%><font size="1" face="Arial,Verdana">Pass <a
href="v4_wireless_802.1x_full/cdrouter_basic_1.txt">想学习</a></font><br>
</td>
<td width=8%><font size="1" face="Arial,Verdana">00:00</font><br>
</td>
<td width=59%><font size="1" face="Arial,Verdana">想学习</font><br>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>

得到的结果是:

1 = ???

? Name

2 = Result

3 = Time

4 = Synopsis





1 = 9 ???

?

2 = +FAIL ?

???

3 = +FAIL

4 = 12:31

5 = ?

?

??





1 = 1 cdrouter_basic_1

2 = Pass ??

??

3 = 00:00

4 = ?

?

??

採用的方法是:改变<meta http-equiv="content-type" content="text/html;charset=UTF-8">变为:<meta http-equiv="content-type" content="text/html;charset=GBK">

具体情况,參考代码例如以下:

package com.xxx.hbuassys.test;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.Iterator;
import java.util.List; import net.htmlparser.jericho.Element;
import net.htmlparser.jericho.HTMLElementName;
import net.htmlparser.jericho.Segment;
import net.htmlparser.jericho.Source; public class HtmlParser
{
public static void main(String[] args) throws Exception
{
BufferedReader reader=new BufferedReader(new InputStreamReader(new FileInputStream(new File("test.html"))));
// BufferedReader reader=new BufferedReader(new FileReader(new File("test.html")));
StringBuilder sbf=new StringBuilder();
String str=null;
while((str=reader.readLine())!=null){
sbf.append(str).append("\n");
}
//解决中文乱码的方法
String html=sbf.toString().replace("<meta http-equiv=\"content-type\" content=\"text/html;charset=UTF-8\">", "<meta http-equiv=\"content-type\" content=\"text/html;charset=GBK\">");
// System.out.println(html);
Source source=new Source(html);
List Elements_TABLE=source.getAllElements(HTMLElementName.TABLE);
Elements_TABLE.remove(0);//因为table相互嵌套,我们须要的是第二个,所以删掉第一个
Iterator it_TABLE = Elements_TABLE.iterator();
while(it_TABLE.hasNext())
{
Element Element_TABLE = (Element)it_TABLE.next();
// System.out.println("**"+Element_TABLE.toString()+"\n**");
Segment getContent_TABLE = (Segment)Element_TABLE.getContent();
List Elements_TR = getContent_TABLE.getAllElements(HTMLElementName.TR);
Iterator it_TR = Elements_TR.iterator();
while(it_TR.hasNext())
{
Element Element_TR = (Element)it_TR.next();
Segment getContent_TR = (Segment)Element_TR.getContent();
List Elements_FONT = getContent_TR.getAllElements(HTMLElementName.FONT);
Iterator it_FONT = Elements_FONT.iterator();
int i = 1;
while(it_FONT.hasNext())
{
Element Element_FONT = (Element)it_FONT.next();
Segment getContent_FONT = (Segment)Element_FONT.getContent();
String a1 = getContent_FONT.toString();
System.out.println(i + " = " + Element_FONT.getContent().getTextExtractor().toString());
i++;
}
System.out.println();
}
}
}
}

结果例如以下:

1 = 想学习 Name

2 = Result

3 = Time

4 = Synopsis





1 = 9 想学习

2 = +FAIL 想学习

3 = +FAIL

4 = 12:31

5 = 想学习





1 = 1 cdrouter_basic_1

2 = Pass 想学习

3 = 00:00

4 = 想学习

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