基于四維地圖，輸入經(jīng)緯度坐標(biāo)，獲得道路名稱，以及poi信息。
四維地圖api接口返回的數(shù)據(jù)有json和xml兩種格式。本篇是對xml數(shù)據(jù)進(jìn)行解析。
使用的是XStream對xml文件進(jìn)行解析。
返回的xml格式數(shù)據(jù)如下。

<xml><result><district_text>北京市>北京市>順義區(qū)</district_text><address>譽(yù)天下社區(qū)服務(wù)站西163米</address><road><lng>116.55100</lng><distance>43</distance><lanenumber>一條車道</lanenumber><roadtype>無屬性</roadtype><limit_speed>40.0</limit_speed><linkid>737249</linkid><urban>1</urban><name>花園六路</name><width>(5.5米~13米]</width><road_level>鄉(xiāng)鎮(zhèn)村道</road_level><lat>40.05941</lat><road_level_code>5</road_level_code></road><district>110113000</district><point><number>機(jī)場楊林出口1000米西北方向140米</number><lng>116.55255</lng><name>譽(yù)天下社區(qū)服務(wù)站</name><lat>40.05973</lat></point><road_address>花園六路西北43米</road_address></result><status>ok</status> </xml>

所需要的依賴如下，不一定全。

<dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpcore</artifactId><version>4.4.10</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.6</version></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>3.7</version></dependency><dependency><groupId>com.thoughtworks.xstream</groupId><artifactId>xstream</artifactId><version>1.4.11.1</version></dependency>

代碼中有個APIKEY我沒貼，測試的時候是得不到返回的數(shù)據(jù)的，因?yàn)檫@個uid是購買四維官方地圖服務(wù)之后提供的。
代碼如下：

package com.example.map2.map;import com.thoughtworks.xstream.XStream; import com.thoughtworks.xstream.io.xml.DomDriver; import org.apache.commons.lang3.StringUtils; import org.apache.http.HttpEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClientBuilder; import org.apache.http.util.EntityUtils;import java.io.IOException; import java.util.concurrent.atomic.AtomicInteger;public class SiweiMapXStream {public static AtomicInteger num=new AtomicInteger(0);public static String[] SERVERS=new String[]{"a.map.icttic.cn","b.map.icttic.cn","c.map.icttic.cn",};public static void main(String[] args) {String lng="116.54475678417967";String lat="40.058573067126176";reserveDecode(lng,lat);}public static String reserveDecode(String lng,String lat){String location=lng+","+lat;String APIKEY="xxxxx";//由于四維地圖是付費(fèi)服務(wù)，此處使用四維官方提供的uid即可，我原來測試使用的就不貼了，畢竟不是我買的String server=getServer();String url="http://"+server+":81/SE_RGC3?st=Rgc3&point="+location+"&uid="+APIKEY+"&output=xml&cd=wgs84&type=11";System.out.println(url);try {String xmlString = doGet(url);XStream xstream = new XStream(new DomDriver());XStream.setupDefaultSecurity(xstream);xstream.allowTypes(new Class[]{Params.class});//xStream對象設(shè)置默認(rèn)安全防護(hù)，同時設(shè)置允許的類xstream.alias("xml", Params.class);//此處"xml"對應(yīng)xml文件中的根節(jié)點(diǎn)名稱Params params = (Params) xstream.fromXML(xmlString);System.out.println(params.toString());}catch (Exception e){return "";}return null;}public static class Params{public Result result;public String status;public String toString(){try{return result.equals(";;") ? "":result.toString();}catch (Exception e){return "";}}}private static class Result{public String district_text;public String address;public String district;public String road_address;public Point point;public Road road;public String toString(){try{district_text=StringUtils.isBlank(district_text) ? "" : district_text.replaceAll(">","");return district_text+";"+road.toString()+";"+point.toString();}catch (Exception e){return "";}}}private static class Road{public String name;public String name2;//四維地圖api新增的一個字段，當(dāng)輸入特殊經(jīng)緯度時會顯示此字段，一般不顯示public String lng;public String distance;public String lanenumber;public String roadtype;public String limit_speed;public String linkid;public String urban;public String width;public String road_level;public String lat;public String road_level_code;public String toString(){try{return StringUtils.isBlank(name)? (StringUtils.isBlank(name2)? "" : name2) : name;}catch (Exception e){return "";}}}private static class Point{public String name;public String number;public String lng;public String lat;public Point(){}public String toString(){try{return StringUtils.isBlank(name) ? "" : name;}catch (Exception e){return "";}}}public static String getServer(){num.addAndGet(1);int i=num.get()%SERVERS.length;return SERVERS[i];}public static String doGet(String url){//創(chuàng)建http客戶端CloseableHttpClient client= HttpClientBuilder.create().build();//請求方式HttpGet httpGet1=new HttpGet(url);//創(chuàng)建響應(yīng)實(shí)體CloseableHttpResponse response1=null;try {response1= client.execute(httpGet1);HttpEntity responseEntity=response1.getEntity();if(responseEntity != null){return EntityUtils.toString(responseEntity);}} catch (IOException e) {e.printStackTrace();}finally {try {if(client != null){client.close();}if (response1 != null){response1.close();}} catch (IOException e) {e.printStackTrace();}}return null;} }

運(yùn)行結(jié)果如下：

總結(jié)

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