java網絡資源下載

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

public class FileUtils {

        public static void main(String[] args) {
            //String url = "https://imgsrc.baidu.com/baike/pic/item/dcc451da81cb39db5aacb0c8dc160924aa1830c4.jpg";
            String url = "https://timgsa.baidu.com/timg?image=&quality=80&size=b9999_10000&sec=1559036917530&di=3a5863ddba86db1238bc10d7b553cb56&imgtype=0&src=http%3A%2F%2Fattach.bbs.miui.com%2Fforum%2F201505%2F27%2F172736r8qcystlxcil9s9l.jpg";
            downloadPicture(url);
        }
        //鏈接url下載圖片
        private static void downloadPicture(String urlList) {
            URL url = null;

            try {
                url = new URL(urlList);
                DataInputStream dataInputStream = new DataInputStream(url.openStream());
                String imageName =  "F:/test.jpg";
                FileOutputStream fileOutputStream = new FileOutputStream(new File(imageName));
                ByteArrayOutputStream output = new ByteArrayOutputStream();
                byte[] buffer = new byte[1024];
                int length;
                while ((length = dataInputStream.read(buffer)) > 0) {
                    output.write(buffer, 0, length);
                }
                fileOutputStream.write(output.toByteArray());
                dataInputStream.close();
                fileOutputStream.close();
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    
}

簡單demo，可根據實際情況修改！