Get Weather data

最新推荐文章于 2023-07-14 15:43:11 发布
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#web services #天气预报
本文介绍了一个用于获取中国各城市天气信息的Java程序。该程序通过解析Web服务返回的XML数据来获取地区、省份、城市的代码，并进一步查询指定城市的天气状况。
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package com.weather;

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.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 WeatherUtil {
	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 PROVINCE_CODE_URL = WEATHER_SERVICES_URL + "getRegionProvince";
	private static String CITY_CODE_URL = WEATHER_SERVICES_URL + "getSupportCityString?theRegionCode=";
	private static String WEATHER_QUERY_URL = WEATHER_SERVICES_URL + "getWeather?theUserID=&theCityCode=";

	private final static String COUNTRY_CODE_URL=WEATHER_SERVICES_URL+"getRegionCountry";

	private WeatherUtil() {
	}

	public static void main(String[] args) {
		int RegionCountry =getRegionCountry("");
		int provinceCode = getProvinceCode("广东"); // 3119
		int cityCode = getCityCode(provinceCode, "深圳"); // 974
		List<String> weatherList = getWeather(cityCode);
		for (String weather : weatherList) {
			System.out.println(weather);
		}
	}

	public static int getRegionCountry(String provinceCountryName){
		Document document;
		DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
		int provinceCode=0;
		DocumentBuilder db;
		try {
			db = dbf.newDocumentBuilder();
			InputStream is = getSoapInputStream(COUNTRY_CODE_URL);
			document = db.parse(is);
			NodeList nodeList = document.getElementsByTagName("string");
			int length = nodeList.getLength();
			for (int i=0; i < length; i++) {
				Node n = nodeList.item(i);
				String result = n.getFirstChild().getNodeValue();
				String[] address = result.split(",");
				String pName = address[0];
				String pCode = address[1];
				if (pName.equalsIgnoreCase(provinceCountryName)) {
					provinceCode = Integer.parseInt(pCode);
				}
			}
		} catch (DOMException e){
			// TODO Auto-generated catch block
			System.out.println("Document Exception "+e.toString());
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			System.out.println("Parse Configuration Exception "+e.toString());
			e.printStackTrace();
		} catch (SAXException e) {
			// TODO Auto-generated catch block
			System.out.println("SAX Exception "+e.toString());
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			System.out.println("IO Exception "+e.toString());
			e.printStackTrace();
		}
		return provinceCode;
	}

	public static int getProvinceCode(String provinceName) {
		Document document;
		DocumentBuilderFactory documentBF = DocumentBuilderFactory
				.newInstance();
		documentBF.setNamespaceAware(true);
		int provinceCode = 0;
		try {
			DocumentBuilder documentB = documentBF.newDocumentBuilder();
			InputStream inputStream = getSoapInputStream(PROVINCE_CODE_URL); 
			document = documentB.parse(inputStream);
			NodeList nodeList = document.getElementsByTagName("string"); 
			int len = nodeList.getLength();
			for (int i = 0; i < len; i++) {
				Node n = nodeList.item(i);
				String result = n.getFirstChild().getNodeValue();
				String[] address = result.split(",");
				String pName = address[0];
				String pCode = address[1];
				if (pName.equalsIgnoreCase(provinceName)) {
					provinceCode = Integer.parseInt(pCode);
				}
			}
			inputStream.close();
		} catch (DOMException e) {
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return provinceCode;
	}

	public static int getCityCode(int provinceCode, String cityName) {
		Document doc;
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		dbf.setNamespaceAware(true);
		int cityCode = 0;
		try {
			DocumentBuilder db = dbf.newDocumentBuilder();
			InputStream is = getSoapInputStream(CITY_CODE_URL + provinceCode); 
			doc = db.parse(is);
			NodeList nl = doc.getElementsByTagName("string"); 
			int len = nl.getLength();
			for (int i = 0; i < len; i++) {
				Node n = nl.item(i);
				String result = n.getFirstChild().getNodeValue();
				String[] address = result.split(",");
				String cName = address[0];
				String cCode = address[1];
				if (cName.equalsIgnoreCase(cityName)) {
					cityCode = Integer.parseInt(cCode);
				}
			}
			is.close();
		} catch (DOMException e) {
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return cityCode;
	}

	public static InputStream getSoapInputStream(String url) {
		InputStream inputStream = null;
		try {
			URL urlObj = new URL(url);
			URLConnection urlConn = urlObj.openConnection();
			urlConn.setRequestProperty("Host", SERVICES_HOST); 
			urlConn.connect();
			inputStream = urlConn.getInputStream();
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return inputStream;
	}

	public static 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;
	}
}