11. ex1 - (5) ExceptionDemo5 (URL로 사진 저장, 복사)

package ex1;
 
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
 
public class ExceptionDemo5 {
 
    public static void main(String[] args) {
        try {
            ExceptionDemo5.saveImage("https://lh3.googleusercontent.com/proxy/m1r7TL7vhUtCOxL1oUvednM4rqZiHJtmJ7gl7O0TsReUlbrmlvfqZeHfrW0Bp0CiZdyz3URuvkDRHf-P-ADHZo_TqFWKdMsbsSAJvNbcZD2G-cldwKINFBVpBNGUJhc1i74f9vOGd_Wdkg");
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
 
    }
 
    // 예외처리를 saveImage() 메서드를 호출한 측에 위임
    // throws 키워드 사용시 해당 메서드 안에서 발생되는 예외에 대한 처리를 호출한 측에 위임
    private static void saveImage(String path) throws MalformedURLException, IOException {
        URL url = new URL(path);
        InputStream in = url.openStream();
 
        FileOutputStream out = new FileOutputStream("c:/files/iu.jpg");
        byte[] buf = new byte[1024];
        int len = 0;
        while ((in.read(buf)) != -1) {
            out.write(buf, 0, len);
        }
        out.close();
        
        ExceptionDemo5.copy(in, out);
 
    }
    
    private static void copy(InputStream in, OutputStream out) throws IOException {
        byte[] buf = new byte[1024];
        int len = 0;
        while ((in.read(buf)) != -1) {
            out.write(buf, 0, len);
        }
        out.close();
    }
    
}