16.中国天气网 JSON接口的城市编码解析及结果
最近在弄一个Android应用,其中一个功能是天气情况展示,准备使用google的天气API服务(http://www.google.com/ig/api?hl=zh-cn&weather=,,,, ),不想这个接口已经在几个月前关闭服务了。于是各种资料,最终决定使用 中国天气网 的服务。
中国天气网提供有两种数据格式的接口:
一、 XML接口
http://flash.weather.com.cn/wmaps/xml/china.xml
http://flash.weather.com.cn/wmaps/xml/changsha.xml
查了好久,发现这个xml接口返回的数据有点乱,果断弃之。
二、JSON接口
http://m.weather.com.cn/data/101250101.html
这个接口返回的是JSON数据,数据格式很好,缺点就是城市编码的问题了。
下面通过XML接口返回的数据来解析全国各地城市所对应的编码,以便使用。
代码:
package com.tangqiang.tools; import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.logging.Logger; import org.dom4j.Document; import org.dom4j.DocumentHelper; import org.dom4j.Element; public class CityCode { private Logger log = Logger.getLogger(CityCode.class.getName()); public static void main(String[] args) { try { CityCode cc = new CityCode(); Document doc = cc.getCityXml(); System.out.println(doc.asXML()); } catch (Exception e) { e.printStackTrace(); } } /** * 解析 * * @return * @throws Exception */ @SuppressWarnings("unchecked") private Document getCityXml() throws Exception { /** 新建一个doc 保存结果 */ Document docResult = DocumentHelper.createDocument(); Element addElementRoot = DocumentHelper.createElement("china"); String sUrlChina = "http://flash.weather.com.cn/wmaps/xml/china.xml"; String sChinaProvXml = getUrlString(sUrlChina); Document doc = DocumentHelper.parseText(sChinaProvXml); Element rootElt = doc.getRootElement(); // 获取根节点 log.info("根节点:" + rootElt.getName()); // 拿到根节点的名称 /** 取得所有省份 */ List<Element> listProv = rootElt.elements("city"); // 获取根节点下的子节点 for (int i = 0; i < listProv.size(); i++) { Element elementProv = listProv.get(i); /** 省份名字 */ String sProvName = elementProv.attributeValue("pyName"); String sProvNameCN = elementProv.attributeValue("quName"); /** 添加节点 */ Element addElementProv = DocumentHelper.createElement("prov"); addElementProv.addAttribute("pyName", sProvName); addElementProv.addAttribute("quName", sProvNameCN); try { log.info("查询省份:" + sProvNameCN + " 下的城市!"); String sUrlProv = "http://flash.weather.com.cn/wmaps/xml/" + sProvName + ".xml"; String sProvXml = getUrlString(sUrlProv); Document docProv = DocumentHelper.parseText(sProvXml); Element rootEltProv = docProv.getRootElement(); // 获取省份下的跟节点 List<Element> listCity1 = rootEltProv.elements("city"); for (int j = 0; j < listCity1.size(); j++) { Element elementCity1 = listCity1.get(j); String sCityName1 = elementCity1.attributeValue("pyName"); String sCityUrl1 = elementCity1.attributeValue("url"); String sCityNameCN1 = elementCity1.attributeValue("cityname"); System.out.println(sCityNameCN1 + ":" + sCityUrl1); Element addElementMainCity = DocumentHelper.createElement("city"); addElementMainCity.addAttribute("pyName", sCityName1); addElementMainCity.addAttribute("quName", sCityNameCN1); addElementMainCity.addAttribute("url", sCityUrl1); try { String sUrlCity1 = "http://flash.weather.com.cn/wmaps/xml/" + sCityName1 + ".xml"; log.info("查询主要城市:" + sCityNameCN1 + " 下的城市!"); String sCityXml = getUrlString(sUrlCity1); Document docCity1 = DocumentHelper.parseText(sCityXml); Element rootCity1 = docCity1.getRootElement(); List<Element> listCity2 = rootCity1.elements("city"); for (int k = 0; k < listCity2.size(); k++) { Element elementCity2 = listCity2.get(k); String sCityName2 = elementCity2.attributeValue("pyName"); String sCityNameCN2 = elementCity2.attributeValue("cityname"); String sCityUrl2 = elementCity2.attributeValue("url"); System.out.println(sCityNameCN2 + ":" + sCityUrl2); Element addElementCity2 = DocumentHelper.createElement("city2"); addElementCity2.addAttribute("pyName", sCityName2); addElementCity2.addAttribute("quName", sCityNameCN2); addElementCity2.addAttribute("url", sCityUrl2); addElementMainCity.add(addElementCity2); } } catch (Exception e) { log.info("查询主要城市:" + sCityNameCN1 + " 下的城市失败!"); } addElementProv.add(addElementMainCity); } } catch (Exception e) { log.info("查询省份:" + sProvNameCN + "下的城市失败!"); } addElementRoot.add(addElementProv); } docResult.setRootElement(addElementRoot); return docResult; } /** * 从url获取xml字符串 * * @param sUrl * @return * @throws Exception */ private String getUrlString(String sUrl) throws Exception { String sResult = ""; StringBuffer sbResult = null; log.info("开始连接Url:" + sUrl); sbResult = new StringBuffer(); URL url = new URL(sUrl); URLConnection con = url.openConnection(); BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8")); String sLine = null; while ((sLine = br.readLine()) != null) { sbResult.append(sLine); } sResult = sbResult.toString(); log.info("获取到信息:" + sbResult.toString().substring(0, 500)); if (sResult.contains("html")) { String sInt = "null"; Integer.parseInt(sInt); } return sResult; } }
结果在附件中,用分别用 xml 和 Json 保存了 2013-03-10 日的城市编码数据。
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