实战之使用正则表达式截取热点数据，并封装成以某个热点为单位的

首先，不错的正则表达式学习基础

正则表达式30分钟入门教程

切入正题：

HTTP

响应output为

"<?xml version="1.0" encoding="UTF-8" ?>n<root>n  <responseHeader>n    <sequence>1364044260890</sequence>n    <timestamp>2013-03-23 21:10:18</timestamp>n    <version>1.0.0</version>n    <returnCode>0</returnCode>n    <errorMessage>成功</errorMessage>n  </responseHeader>n  <responsePage>n    <hasNextPage>true</hasNextPage>n    <hasPreviousPage>false</hasPreviousPage>n    <lastPageNumber>4</lastPageNumber>n    <totalCount>62</totalCount>n    <thisPageFirstElementNumber>1</thisPageFirstElementNumber>n    <thisPageLastElementNumber>20</thisPageLastElementNumber>n    <nextPageNumber>2</nextPageNumber>n    <previousPageNumber>0</previousPageNumber>n    <pageSize>20</pageSize>n    <thisPageNumber>1</thisPageNumber>n    <firstResult>0</firstResult>n  </responsePage>n  <hotpointInfoList>n    <hotpointInfo>n      <name>天朗明居北区C N5栋</name>n      <nasid>301693</nasid>n      <address>广州市天河区中山大道与车陂路交汇处</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3862</longitude>n      <latitude>23.1296</latitude>n      <coverageArea>本次工程覆盖N5栋楼高26层。</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>393.5081511793397</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>棠下街道办事处</name>n      <nasid>302082</nasid>n      <address>棠下棠德东路棠德小区E栋-1棠下街道办事处</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3815</longitude>n      <latitude>23.1354</latitude>n      <coverageArea>棠下街道办事处1-2F</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>402.49152162918364</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>天朗明居南区C S1</name>n      <nasid>301690</nasid>n      <address>广州市天可区中山大道与车陂路交汇处</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3862</longitude>n      <latitude>23.1284</latitude>n      <coverageArea>S1栋</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>499.4094297245712</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>正果工商所</name>n      <nasid>301470</nasid>n      <address>增城区正果大道88号</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3886</longitude>n      <latitude>23.1311</latitude>n      <coverageArea>工商所办公大厅、2F</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>523.7109776951346</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>易初莲花车陂店C</name>n      <nasid>301864</nasid>n      <address>广州市天河区车陂路</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3854</longitude>n      <latitude>23.1258</latitude>n      <coverageArea>卖场区域</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>748.1531798245414</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景东御苑C8SW08</name>n      <nasid>301891</nasid>n      <address>广州市天河区中山大道190号</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3839</longitude>n      <latitude>23.1256</latitude>n      <coverageArea>G1-G6,H1-H2全部楼层公共区域</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>749.2729513269494</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景东御苑C7SW07</name>n      <nasid>301892</nasid>n      <address>广州市天河区中山大道190号</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3839</longitude>n      <latitude>23.1256</latitude>n      <coverageArea>G1-G6,H1-H2全部楼层公共区域</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>749.2729513269494</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景东御苑C4SW04</name>n      <nasid>301894</nasid>n      <address>广州市天河区中山大道190号</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3839</longitude>n      <latitude>23.1255</latitude>n      <coverageArea>G1-G6,H1-H2全部楼层公共区域</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>760.1215323422311</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景东御苑C3SW03</name>n      <nasid>301895</nasid>n      <address>广州市天河区中山大道190号</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3839</longitude>n      <latitude>23.1255</latitude>n      <coverageArea>G1-G6,H1-H2全部楼层公共区域</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>760.1215323422311</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景东御苑C2SW02</name>n      <nasid>301896</nasid>n      <address>广州市天河区中山大道190号</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3839</longitude>n      <latitude>23.1255</latitude>n      <coverageArea>G1-G6,H1-H2全部楼层公共区域</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>760.1215323422311</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景东御苑C5SW05</name>n      <nasid>301893</nasid>n      <address>广州市天河区中山大道190号</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3839</longitude>n      <latitude>23.1256</latitude>n      <coverageArea>G1-G6,H1-H2全部楼层公共区域</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>760.1215323422311</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景东御苑C6SW06</name>n      <nasid>301890</nasid>n      <address>广州市天河区中山大道190号</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3839</longitude>n      <latitude>23.1256</latitude>n      <coverageArea>G1-G6,H1-H2全部楼层公共区域</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>760.3864516706291</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景东御苑G3栋</name>n      <nasid>301898</nasid>n      <address>广州市天河区中山大道192号</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3838</longitude>n      <latitude>23.1254</latitude>n      <coverageArea>1F-28F</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>771.2390231563601</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>南洋冠盛酒店</name>n      <nasid>302093</nasid>n      <address>天府路11号</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3805</longitude>n      <latitude>23.1258</latitude>n      <coverageArea>酒店1-13F</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>805.295261820077</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景花园南苑东区B骏灏轩D栋SW10</name>n      <nasid>301910</nasid>n      <address>广州市天河区中山大道旁骏景花园</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3819</longitude>n      <latitude>23.1239</latitude>n      <coverageArea>骏灏轩D栋</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>967.8317796098889</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景花园南苑东区B骏盈轩D栋SW15</name>n      <nasid>302068</nasid>n      <address>广州市天河区中山大道旁骏景花园</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3817</longitude>n      <latitude>23.1239</latitude>n      <coverageArea>骏盈轩D栋</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>969.8902627929679</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景花园南苑东区B骏盈轩B栋SW16</name>n      <nasid>302067</nasid>n      <address>广州市天河区中山大道旁骏景花园</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3818</longitude>n      <latitude>23.1239</latitude>n      <coverageArea>骏盈轩B栋</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>969.8902627929679</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景花园南苑东区B骏盈轩E栋SW14</name>n      <nasid>302069</nasid>n      <address>广州市天河区中山大道旁骏景花园</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3817</longitude>n      <latitude>23.1238</latitude>n      <coverageArea>骏盈轩E栋</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>969.8902627929679</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景花园南苑东区B骏灏轩F栋SW12</name>n      <nasid>302071</nasid>n      <address>广州市天河区中山大道旁骏景花园</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3817</longitude>n      <latitude>23.1238</latitude>n      <coverageArea>骏灏轩F栋</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>969.8902627929679</distance>n    </hotpointInfo>n    <hotpointInfo>n      <name>骏景花园南苑东区B骏灏轩E栋SW11</name>n      <nasid>302072</nasid>n      <address>广州市天河区中山大道旁骏景花园</address>n      <province>200</province>n      <cityCode>440100</cityCode>n      <type>99</type>n      <longitude>113.3817</longitude>n      <latitude>23.1238</latitude>n      <coverageArea>骏灏轩E栋</coverageArea>n      <isRecommend>0</isRecommend>n      <distance>969.8902627929679</distance>n    </hotpointInfo>n  </hotpointInfoList>n</root>"

需要截取每个

hotpointInfo中的address，name，distance等信息

利用正则表达式

代码如下：

 MatchCollection hotspotMatches = Regex.Matches(output,"<hotpointInfo>.*?<name>(?<name>.*?)</name>.*?<address>(?<address>.*?)</address>.*?<cityCode>(?<city>.*?)</cityCode>.*?<type>(?<hottype>.*?)</type>.*?<longitude>(?<longitude>.*?)</longitude>.*?<latitude>(?<latitude>.*?)</latitude>.*?(.*?<coverageArea>(?<coverarea>.*?)</coverageArea>)?.*?<distance>(?<distance>.*?)</distance>.*?</hotpointInfo>",RegexOptions.Singleline);
 foreach (Match hotspotMatch in hotspotMatches)
 {
 Dictionary<String,String> dict = new Dictionary<string,string>();
 double distanceDou = double.Parse(hotspotMatch.Groups["distance"].Value);
 //make display 110 meter 
 //not 110.12232453242 meter
 int distanceInt = (int)distanceDou;
 dict.Add("name",hotspotMatch.Groups["name"].Value);
 dict.Add("address",hotspotMatch.Groups["address"].Value);
 string city = FromCityIdToName(hotspotMatch.Groups["city"].Value);
 dict.Add("city",city);
 dict.Add("hottype",hotspotMatch.Groups["hottype"].Value);
 dict.Add("longitude",hotspotMatch.Groups["longitude"].Value);
 dict.Add("latitude",hotspotMatch.Groups["latitude"].Value);
 dict.Add("coverarea",hotspotMatch.Groups["coverarea"].Value);
 dict.Add("distance",Convert.ToString(distanceInt));
 dict.Add("total",totalPage);
 ((List<Dictionary<String,String>>)returnData).Add(dict);
 }

（编辑：李大同）

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