公交線路免費api介面代碼

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描述：本介面主要是根據城市名稱 +  線路名稱 模糊尋找城市公交線路資訊。

開源api介面：http://openapi.aibang.com/bus/lines?app_key=f41c8afccc586de03a99c86097e98ccb&city="+cityName+"&q="+line

其中cityName = URLEncoder.encode(cityName,"utf-8")

    line = URLEncoder.encode(line,"utf-8")

 

代碼實現如下：

package org.wx.xhelper.model;/** * 公交資訊實體類 * @author wangxw * @version 1.0 * @date Jul 8, 2014 8:15:49 AM */public class Bus {// 結果數量private int resultNum;// 線路名稱private String name;// 線路資訊private String info;// 沿途網站private String stats;// 途徑網站經緯度private String statXys;// 線路座標private String xys;// 描述private String description;public int getResultNum() {return resultNum;}public void setResultNum(int resultNum) {this.resultNum = resultNum;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getInfo() {return info;}public void setInfo(String info) {this.info = info;}public String getStats() {return stats;}public void setStats(String stats) {this.stats = stats;}public String getStatXys() {return statXys;}public void setStatXys(String statXys) {this.statXys = statXys;}public String getXys() {return xys;}public void setXys(String xys) {this.xys = xys;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}}

介面服務類實現代碼：

package org.wx.xhelper.service;import java.io.UnsupportedEncodingException;import java.net.URL;import java.net.URLEncoder;import java.util.ArrayList;import java.util.List;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import org.w3c.dom.Document;import org.w3c.dom.NodeList;import org.wx.xhelper.model.Bus;/** * 公交查詢服務介面類 * @author wangxw * @version 1.0 * @date Jul 2, 2014 1:55:14 PM */public class BusQueryService {/** * 產生公交查詢資訊 * @return 公交資訊  * @throws UnsupportedEncodingException  */public static String getBusInfoDetail(String cityName,String line) throws UnsupportedEncodingException{// 擷取線路資訊List<Bus> buslist = getBusInfo(cityName,line);// 儲存文本資訊StringBuffer news = new StringBuffer();if (buslist != null && buslist.size() > 0) {for(int i=0;i<buslist.size();i++){if(buslist.get(i).getName().startsWith(line)){if(news.length()==0){news.append(buslist.get(i).getDescription()).append("\n\n");}else{news.append(buslist.get(i).getDescription());}}}}if(news.length() == 0){news.append("沒有").append(line).append("這條線路,請輸入準確線路!");}return news.toString();}/** * 擷取線路資訊 * @param cityName * @param line * @return */public static List<Bus> getBusInfo(String cityName,String line){URL url = null;List<Bus> list = new ArrayList<Bus>();try{DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder();try {cityName = URLEncoder.encode(cityName,"utf-8");line = URLEncoder.encode(line,"utf-8");        } catch (Exception e) {            e.printStackTrace();        }url = new URL("http://openapi.aibang.com/bus/lines?app_key=f41c8afccc586de03a99c86097e98ccb&city="+cityName+"&q="+line);Document doc = builder.parse(url.openStream());NodeList node = doc.getElementsByTagName("line"); for(int i=0;i<node.getLength();i++){ Bus bus = new Bus();String name = "";String info = "";String stats = "";String statXys = "";String xys = "";if(doc.getElementsByTagName("name").item(i).getFirstChild() != null){name = doc.getElementsByTagName("name").item(i).getFirstChild().getNodeValue();}if(doc.getElementsByTagName("info").item(i).getFirstChild() != null){info = doc.getElementsByTagName("info").item(i).getFirstChild().getNodeValue();}if(doc.getElementsByTagName("stats").item(i).getFirstChild() != null){stats = doc.getElementsByTagName("stats").item(i).getFirstChild().getNodeValue();}if(doc.getElementsByTagName("stat_xys").item(i).getFirstChild() != null){statXys = doc.getElementsByTagName("stat_xys").item(i).getFirstChild().getNodeValue();}if(doc.getElementsByTagName("xys").item(i).getFirstChild() != null){xys = doc.getElementsByTagName("xys").item(i).getFirstChild().getNodeValue();}bus.setName(name);bus.setInfo(info);bus.setStats(stats);bus.setStatXys(statXys);bus.setXys(xys);bus.setDescription(name + "\n" + info + "\n" + stats);list.add(bus);}}catch(Exception e){e.printStackTrace();}return list;}}

查詢線路結果最佳化：

      由於線路查詢使用模糊查詢，故查詢結果會有多個。

     比如 輸入 蘇州+2路 查詢結果會有：2路、夜2路、遊2路、快線2號、報關報檢專2線、軌道交通2號線等多個資訊。如果要做到精確尋找，現做以下改進：

     過濾掉路線不是以2路開頭的線路資訊

// 儲存文本資訊StringBuffer news = new StringBuffer();if (buslist != null && buslist.size() > 0) {for(int i=0;i<buslist.size();i++){if(buslist.get(i).getName().startsWith(line)){if(news.length()==0){news.append(buslist.get(i).getDescription()).append("\n\n");}else{news.append(buslist.get(i).getDescription());}}}}