公交线路免费api接口代码

描述：本接口主要是根据城市名称 +  线路名称 模糊查找城市公交线路信息。

开源api接口：http://openapi.aibang.com/bus/lines?app_key=keyvalue&city="+cityName+"&q="+line

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

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

 

代码实现如下：

package org.wx.xhelper.model;/** * 公交信息实体类 * @author wangxw * @version 1.0 * @date Jul 8, 2014 8:15:49 AM */public class Bus {// 结果数量private int resultNum;// 线路名称private String name;// 线路信息private String info;// 沿途站点private String stats;// 途径站点经纬度private String statXys;// 线路坐标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;}}

接口服务类实现代码：

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;/** * 公交查询服务接口类 * @author wangxw * @version 1.0 * @date Jul 2, 2014 1:55:14 PM */public class BusQueryService {/** * 生成公交查询信息 * @return 公交信息  * @throws UnsupportedEncodingException  */public static String getBusInfoDetail(String cityName,String line) throws UnsupportedEncodingException{// 获取线路信息List<Bus> buslist = getBusInfo(cityName,line);// 存储文本信息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("没有").append(line).append("这条线路,请输入准确线路!");}return news.toString();}/** * 获取线路信息 * @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;}}

查询线路结果优化：

      由于线路查询使用模糊查询，故查询结果会有多个。

     比如 输入 苏州+2路 查询结果会有：2路、夜2路、游2路、快线2号、报关报检专2线、轨道交通2号线等多个信息。如果要做到精确查找，现做以下改进：

     过滤掉路线不是以2路开头的线路信息

// 存储文本信息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());}}}}