距离第一章的入门讲解已经有一段时间了,最近的确没有空,今天我们在上一次的基础上来进行一个扩展,实现天气查询功能,大概就是,我们在手机上想我们的公众账号发送一个消息,比如“weather”,服务器获取当前天气进行返回给手机客户端,(大家可以关注我的公众账号测试效果,左边个人资料有二维码。注*此功能已经在第三章《结合百度云平台和微信公众平台开发(三)》升级,取消了Weather关键字,改为“天气北京”,“天气南京”类的定点查询)如下图:
首先要声明的是,天气的获取有很多种方法,但我们最好是使用WebXml这个网站提供我们的数据,更新快,不涉及侵权,非常好用的地址是:点击打开链接
入口类没有什么变化,就是多了一个字符判断而已,这里就不贴完整代码了,大家可以参考上一篇:
//微信客户端发送time,服务器解析到后返回当前时间 else if(keyword.equals("time")){ contentStr = GetTime.getTime(); }else if(keyword.equals("weather")){ contentStr = GetTime.getTime()+"~~"+Weather.getWeather(); }下面说说获取天气的代码实现:
package com.weixin.zfeng.utils; import java.io.IOException; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import java.util.ArrayList; import java.util.Date; import java.util.List; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.DOMException; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; public class Weather { private static String SERVICES_HOST = "www.webxml.com.cn"; private static String WEATHER_SERVICES_URL = "http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx/"; private static String WEATHER_QUERY_URL = WEATHER_SERVICES_URL + "getWeather?theUserID=&theCityCode="; /** * 城市代码 / 镇江: 1954 */ //这里是通过城市对应的代码来实现查询的,全国各个城市代码号,大家可以在官方网站看到,实际开发是,需要将它们全部拿来 private static int CITICODE = 1954; public static String getWeather(){ String desc = "今天是" + DateUtils.getYear() + "," + DateUtils.getWeekOfDate(new Date()); desc += new Weather().getWeatherStr(); return desc; } public InputStream getSoapInputStream(String url) { InputStream inputStream = null; try { URL urlObj = new URL(url); URLConnection urlConn = urlObj.openConnection(); urlConn.setRequestProperty("Host", SERVICES_HOST); // 具体webService相关 urlConn.connect(); inputStream = urlConn.getInputStream(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return inputStream; } public String getWeatherStr() { String desc = ""; try { List<String> weatherList = getWeather(CITICODE); if (weatherList != null && weatherList.size() > 7) { String tianqi = weatherList.get(7); if (tianqi.contains("日")) { tianqi = tianqi.substring(tianqi.indexOf("日") + 1); } String wendu = weatherList.get(8); desc += ",天气" + tianqi; desc += " ,"; desc += wendu.replace("℃", "度").replace("/", "--"); } } catch (Exception e) { e.printStackTrace(); return desc; } return desc; } public List<String> getWeather(int cityCode) { List<String> weatherList = new ArrayList<String>(); Document document; DocumentBuilderFactory documentBF = DocumentBuilderFactory .newInstance(); documentBF.setNamespaceAware(true); try { DocumentBuilder documentB = documentBF.newDocumentBuilder(); InputStream inputStream = getSoapInputStream(WEATHER_QUERY_URL + cityCode); document = documentB.parse(inputStream); NodeList nl = document.getElementsByTagName("string"); int len = nl.getLength(); for (int i = 0; i < len; i++) { Node n = nl.item(i); String weather = n.getFirstChild().getNodeValue(); weatherList.add(weather); } inputStream.close(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (DOMException e) { e.printStackTrace(); } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (SAXException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return weatherList; } //大家务必在此测试一下后哦 // public static void main(String[] args) { // System.out.println(Weather.getWeather()); // } }就这么多,很简单的,上一次我忘记在入口类中处理编码问题,这样汉字会出现乱码,大家记住改一下:
req.setCharacterEncoding("UTF-8"); resp.setCharacterEncoding("UTF-8");文章转载须注明出处: http://blog.csdn.net/fengfeng91