原XML文件 目的是先按year分组，然后再在year中按照typeid分组
<?xml version="1.0" encoding="GB2312"?>
<catalog>
<cd>
<title>Empire Burlesque </title>
<typeid>001 </typeid>
<year>1985 </year>
</cd>
<cd>
<title>Hide your heart </title>
<typeid>002 </typeid>
<year>1985 </year>
</cd>
<cd>
<title>Still got the blues </title>
<typeid>001 </typeid>
<year>1986 </year>
</cd>
</catalog>
要求转成如下格式：
<?xml version="1.0" encoding="GB2312"?>
<Result>
<Year id = "1985">
<Typeid num = "001">
<title>Empire Burlesque </title>
</Typeid>
<Typeid num = "002"
如何对xml内容数据进行比较
例如：
<?xml version='1.0' encoding='utf-8'?>
<TestLIST>
<PID>40</PID>
<TestName>深圳市</TestName>
......
<XML>
<FLAG>1</FLAG>
<REASON></REASON>
<ADVERT><ADID>64</ADID><ADNAME>英皇娱乐四</ADNAME><ADCONTENT>内容一</ADCONTENT><ADT ......
