JAVA 实现通过URL下载文件到本地库

 /**
      * TODO 下载文件到本地
      * @author nadim
      * @date Sep 11, 2015 11:45:31 AM
      * @param fileUrl 远程地址
      * @param fileLocal 本地路径
      * @throws Exception
      */
     public void downloadFile(String fileUrl,String fileLocal) throws Exception {
         URL url = new URL(fileUrl);
         HttpURLConnection urlCon = (HttpURLConnection) url.openConnection();
         urlCon.setConnectTimeout(6000);
         urlCon.setReadTimeout(6000);
         int code = urlCon.getResponseCode();
         if (code != HttpURLConnection.HTTP_OK) {
             throw new Exception("文件读取失败");
         }

         //读文件流
         DataInputStream in = new DataInputStream(urlCon.getInputStream());
         DataOutputStream out = new DataOutputStream(new FileOutputStream(fileLocal));
         byte[] buffer = new byte[2048];
         int count = 0;
         while ((count = in.read(buffer)) > 0) {
             out.write(buffer, 0, count);
         }
         out.close();
         in.close();
     }