Java常用代碼

標籤：span   技術   read   close   output   url   etc   one   失敗   

1. 下載網狀圖片

 1 public void download(String strUrl, String filename){ 2     try{ 3         URL url = new URL(strUrl); 4         HttpURLConnection  conn = (HttpURLConnection) url.openConnection(); 5         conn.setConnectTimeout(5*1000);   6         conn.connect(); 7         InputStream in = conn.getInputStream(); 8          9         OutputStream out = new FileOutputStream(new File(filename));10         11         byte[] buf = new byte[1024];12         int len = 0;13         while((len = in.read(buf)) != -1){14             out.write(buf, 0, len);15         }16         in.close();17         out.close();18         System.out.println(filename + "下載成功");19     }catch(Exception e){20         System.out.println(filename + "下載失敗");21     }22 }

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Java常用代碼