Google Weather API 天气查询程序

import java.io.;

import javax.xml.parsers.;

import org.w3c.dom.;

import .;

import java.util.Scanner;

import org.xml.sax.InputSource;

public class Weather{

public static void main(String[] args){

try{Scanner scanner= new Scanner(System.in);获取输入的城市名字

String cityname = scanner.next();

DocumentBuilderFactory cfactory = DocumentBuilderFactory.newInstance(); 获得一个XML的解析器

DocumentBuilder cbuilder = cfactory.newDocumentBuilder(); 解析XML生成DOM

Document cdocument = cbuilder.parse(new File(exmlcities.xml)); cdocument获得对应整个cities.xml的文档树

NodeList cnodelist = cdocument.getElementsByTagName(cityname); 搜索城市标签

Node city = cnodelist.item(0); 定位到城市的节点

Element celement = (Element)city;

String googleapi = celement.getAttribute(data); 获取城市的拼音

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

DocumentBuilder builder = factory.newDocumentBuilder();

URL url = new URL(igapihl=zh-cn&weather=+googleapi); 从Google Weahther API

InputStream is = url.openStream(); 获取所选城市的

InputStreamReader isr = new InputStreamReader(is,GBK); XML天气文档

InputSource source = new InputSource(isr);

Document document = builder.parse(source); document是对应于天气文档的文档树

Element element = document.getDocumentElement();根节点

NodeList nodelist = element.getChildNodes();

Node Weather = nodelist.item(0); Weather节点

Element tempelement = (Element) Weather;

NodeList W = tempelement.getChildNodes();

NodeList temp;

Node W1 = W.item(1); 目前天气节点

Node W2 = W.item(2); 今天天气节点

Node W3 = W.item(3); 明天天气节点

Node W4 = W.item(4); 后天天气节点

Node W5 = W.item(5); 大后天天气节点

Element a,b,c,d; 储存天气情况属性的四个节点

打印当前天气

tempelement = (Element) W1;

temp = tempelement.getChildNodes();

a = (Element) temp.item(0);

b = (Element) temp.item(2);

c = (Element)temp.item(3);

d = (Element)temp.item(5);

System.out.println(当前天气：);

System.out.println( +a.getAttribute(data)+ 温度+b.getAttribute(data)+ +c.getAttribute(data)+ +d.getAttribute(data));

打印今天天气

tempelement = (Element) W2;

temp = tempelement.getChildNodes();

a = (Element) temp.item(0);

b = (Element) temp.item(1);

c = (Element)temp.item(2);

d = (Element)temp.item(4);

System.out.println(a.getAttribute(data)+天气：);

System.out.println( +d.getAttribute(data)+ 最低温度+b.getAttribute(data)+ 最高温度：+c.getAttribute(data));

打印明天天气

tempelement = (Element) W3;

temp = tempelement.getChildNodes();

a = (Element) temp.item(0);

b = (Element) temp.item(1);

c = (Element)temp.item(2);

d = (Element)temp.item(4);

System.out.println(a.getAttribute(data)+天气：);

System.out.println( +d.getAttribute(data)+ 最低温度+b.getAttribute(data)+ 最高温度：+c.getAttribute(data));

打印后天天气

tempelement = (Element) W3;