HttpURLConnection 클래스

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class Example {
	
	public static void main(String [] args) 
	{
		BufferedReader in = null;
		
		
		try 
		{
			URL obj = new URL("http://ws.bus.go.kr/api/rest/buspos/getBusPosByRtid?busRouteId=1111111");

 # 여기서 URL은 사용자가 호출할 URL주소를 입력하면 된다 . 



			HttpURLConnection con = (HttpURLConnection)obj.openConnection();
			
			con.setRequestMethod("GET");
			
			in = new BufferedReader(new InputStreamReader(con.getInputStream(),"UTF-8"));
			
			String line;
			while((line = in.readLine()) != null)
			{
				System.out.println(line);
			}
		}
		catch(Exception e) 
		
		{
			e.printStackTrace();
		}
		
		finally 
		{
			if(in != null) 
			{
				try 
				{
					in.close();
				}
				catch(Exception e) 
				{
					e.printStackTrace();
				}
			}
		}
	}
}