公交线路免费api接口代码

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;
}

}

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());
}
}
}
}