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http://wthrcdn.etouch.cn/WeatherApi?city=
http://wthrcdn.etouch.cn/weather_mini?city=
两个链接后加上UrlEncoded城市名字就能获得信息。
前者为XML，后者为Json。包括当天的具体天气信息，生活指数，以及未来五天的天气信息。
XML的数据在生活指数上更为丰富。
http://wthrcdn.etouch.cn/weather_mini?citykey=
http://wthrcdn.etouch.cn/WeatherApi?citykey=
这两个需要通过通过城市id来访问，获得的内容同上，ID列表见
http://cj.weather.com.cn/support/Detail.aspx?id=51837fba1b35fe0f8411b6df
城市ID数据txt：
https://drive.google.com/file/d/0B9zkTpK3eXCGc01XM2xPeHFSdEU/view?usp=sharing
需要注意的是，Json数据被GZIP压缩。
Java应用下测试需要解压。
安卓环境下测试不需要解压，不知道为什么。
所以建议抽取前两个字节判断是否为0x1f8b（GZIP的header）再操作比较稳妥。
彩云天气上有免费的逐小时预报的API，不过需要注册审核，不然只能用token测试账号，如果审核完毕，我也写个demo。
使用gson解析json的Demo如下。
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Scanner;
import java.util.zip.GZIPInputStream;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
/**
* @HowToUse You should use constructor by city's name, and use setJsonProject(method) to prepare for data.
* @author Dell
*/
public class Weather {
private static String CharSet = "UTF-8";
private String city;
private JsonObject jsonOrinal;
private JsonObject jsonData;
private JsonArray jsonForecastArray;
//testing
public static void main(String[] args) {
System.out.print("Query:");
Scanner input = new Scanner(System.in);
String inputCity = input.next();
input.close();
Weather weather = new Weather(inputCity);
if(weather.setJsonProject()==1){//Query Successfully
System.out.println("City："+ weather.getCity());
System.out.println("℃:"+ weather.getTemperatureNow());
System.out.println("AQI:"+ weather.getAQI());
System.out.println("Tomorrow's highest ℃:"+ weather.getSomeDaydata(0).get("high"));
}else{
System.out.println("Error！");
}
}
public Weather(String city) {
this.city = city;
}
/**
* <p> change the word to UrlEncoded</p>
* @param word the word waiting to be urlencoded
* @return UrlEncoded string urlencoded
*/
static private String ToUrlEncoded(String word) {
String urlStr = null;
try {
urlStr = URLEncoder.encode(word,CharSet);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return urlStr;
}
/**
* <p> prepare JsonProject for outside using</p>
* @return 1:success -1:invalid city name 0:Error
*/
public int setJsonProject() {
try {
URL url = new URL("http://wthrcdn.etouch.cn/weather_mini?city="+ToUrlEncoded(this.city));
URLConnection urlConnection = url.openConnection();
//GZIP or not
InputStream is;
BufferedInputStream bis = new BufferedInputStream(urlConnection.getInputStream());
bis.mark(2);
byte[] header = new byte[2];
int result = bis.read(header);
bis.reset();
//Judge header
int headerData = (int) ((header[0] << 8) | header[1] & 0xFF);
if (result != -1 && headerData == 0x1f8b) {
is = new GZIPInputStream(bis);
} else {
is = bis;
}
InputStreamReader isr = new InputStreamReader(is);
BufferedReader bReader = new BufferedReader(isr);
StringBuilder sbWeather = new StringBuilder();
String line;
while((line = bReader.readLine()) != null){
sbWeather.append(line);
}
bReader.close();
JsonParser parser = new JsonParser();
this.jsonOrinal = (JsonObject) parser.parse(sbWeather.toString());
//check json data
if(this.jsonOrinal.get("status").getAsInt()==1000){
jsonData = this.jsonOrinal.get("data").getAsJsonObject();
jsonForecastArray = jsonData.get("forecast").getAsJsonArray();
return 1;
}else{
return -1;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return 0;
}
/**
* <p> get AQI num</p>
* @return String AQI Data
*/
public String getAQI() {
try{
return this.jsonData.get("aqi").getAsString();
} catch (Exception e) {
e.printStackTrace();
}
return "Failed";
}
/**
* <p> get Temperature Now</p>
* @return String Temperature right now as ℃
*/
public String getTemperatureNow() {
try{
return this.jsonData.get("wendu").getAsString();
} catch (Exception e) {
e.printStackTrace();
}
return "Failed";
}
/**
* <p> get City's name</p>
* @return String City name
*/
public String getCity() {
try{
return this.jsonData.get("city").getAsString();
} catch (Exception e) {
e.printStackTrace();
}
return "Failed";
}
/**
* <p> get weather information of a specific day<br>
* return a hashmap which contents weather information of 5 days in the future including highest and lowest
* temperature, date, wind grading, weather type
* </p>
* @return HashMap the hashmap in introduction
*/
public HashMap<String, String> getSomeDaydata(int day) {
if(day >= 0 && day <=4){
try {
HashMap<String, String> day2Map = new HashMap<String, String>();
JsonObject day2Object = this.jsonForecastArray.get(day).getAsJsonObject();
day2Map.put("date", day2Object.get("date").getAsString());
day2Map.put("high", day2Object.get("high").getAsString());
day2Map.put("low", day2Object.get("low").getAsString());
day2Map.put("windGrade", day2Object.get("fengli").getAsString());
day2Map.put("type", day2Object.get("type").getAsString());
return day2Map;
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
/**
* <p> get tips about cold</p>
* @return String Cold infomation
*/
public String getColdInfo(){
try{
return jsonData.get("ganmao").getAsString();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}