批量下載圖片的代碼實現

  @Test
    public void test() {
        String url_1 = "http://s7ondemand6.scene7.com/is/image/MothercareASE/";
        String url_2 = "?&$dw_large_mc$&wid=800&hei=800&fit=fit,1";
        List<String> styleIds = Arrays.asList(
                "mj245",
                "mj227",
                "mj235",
                "mj240",
                "mb519"
                );
        List<String> failIds = Lists.newArrayList();
        int count =1 ;
        for (String str:styleIds) {
            for (int j=1;j<20;j++) {
                String styleIdStr = "l"+str + "_" + j;
                String url = url_1 + styleIdStr + url_2;
                // 網絡請求所需變量
                try {
                    URL urlIn = new  URL(url);
                    InputStream inputStream = urlIn.openStream();
                    //獲取輸入流
                    BufferedInputStream in = new BufferedInputStream(inputStream);
                    //創建文件流
                    File file = new File("D:/myPic/" + styleIdStr + ".jpg");
                    BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file));
                    byte[] data = new byte[4096];
                    int c;
                    while ((c =in.read(data))  > 0 ) {
                        out.write(data, 0, c);
                    }
                    System.out.println("正在下載第"+count+"個圖片,圖片名爲" + styleIdStr + ".jpg");
                    count++;
                    out.close();
                    in.close();
                } catch (MalformedURLException e) {
                    if(j==1){
                        failIds.add(str);
                    }
                } catch (IOException e) {
                    if(j==1){
                        failIds.add(str);
                    }
                    break;
                }
            }
        }
        System.out.println(failIds);
    }

補充:這個只是最初的版本,因爲很多時候因爲網絡波動導致連接超時,目前只能記錄下載失敗的ID,再運行一次,這裏等待後續優化!