import java.io.BufferedReader;
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;

public class Util {

/**
 * 读取网址数据
 * @return
 */
public static String getString(String url){
    //1. 创建一个网址的 抽象表示（对象）
    try {
        URL u = new URL(url);
        //2. 打开链接
        URLConnection conn = u.openConnection();
        //3. 获取传输数据的通道（字节输入流）
        InputStream is = conn.getInputStream();
        //4. 将字节输入流，装饰为能一次读取一行文字的缓冲字符输入流
        BufferedReader br = new BufferedReader(new InputStreamReader(is,"UTF-8"));
        //5. 读取一行行的数据，并汇总
        StringBuffer sb = new StringBuffer();
        String text = null;
        while((text = br.readLine())!=null){
            sb.append(text);
        }
        //6. 将读取的数据返回给调用者
        return sb.toString();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

/**
 * 查询天气
 * @param city 要查询的城市
 * @return 天气结果
 */
public static String getWeather(String city){

    try {
        String json = getString("https://itdage.cn/hw/weather?city="+ URLEncoder.encode(city,"utf-8"));
        return json;
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    return null;
}

public static String sendSms(String name,String phoneNumber,String s1,String s2,String s3){
    try {
        name = URLEncoder.encode(name,"utf-8");
        s1 = URLEncoder.encode(s1,"utf-8");
        s3 = URLEncoder.encode(s3,"utf-8");
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }

    String json = getString("https://itdage.cn/hw/hwSms?name="+name+"&phoneNumber="+phoneNumber+"&s1="+s1+"&s2="+s2+"&s3="+s3);
    return json;
}

public static void main(String[] args) throws UnsupportedEncodingException {
    String weather = getWeather("北京");
    System.out.println(weather);
}

}

天气工具