通过指定的|通过指定的 url 去网络或者文件服务器下载文件到本地某个文件夹

/** * 从网络Url中下载文件 * @param urlStr指定的url * @param fileName下载文件到本地的名字 * @param savePath本地保存下载文件的路径 * @throws IOException */ public static voiddownLoadFromUrl(String urlStr,String fileName,String savePath) throws IOException{ URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); //设置超时间为3秒 //conn.setConnectTimeout(3*1000); //防止屏蔽程序抓取而返回403错误 //conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); //得到输入流 InputStream inputStream = conn.getInputStream(); //获取自己数组 byte[] getData = https://www.it610.com/article/readInputStream(inputStream); //文件保存位置 File saveDir = new File(savePath); if(!saveDir.exists()){ saveDir.mkdir(); } File file = new File(saveDir+File.separator+fileName); FileOutputStream fos = new FileOutputStream(file); fos.write(getData); if(fos!=null){ fos.close(); } if(inputStream!=null){ inputStream.close(); }System.out.println("info:"+url+" download success"); }/** * 从输入流中获取字节数组 * @param inputStream * @return * @throws IOException */ public staticbyte[] readInputStream(InputStream inputStream) throws IOException { byte[] buffer = new byte[1024]; int len = 0; ByteArrayOutputStream bos = new ByteArrayOutputStream(); while((len = inputStream.read(buffer)) != -1) { bos.write(buffer, 0, len); } bos.close(); return bos.toByteArray(); }//main函数测试 public static void main(String[] args) throws IOException {downLoadFromUrl("http://baidu.pdf","lq.pdf","d:/file/"); //System.out.println(111); }


【通过指定的|通过指定的 url 去网络或者文件服务器下载文件到本地某个文件夹】转载于:https://www.cnblogs.com/liuqing576598117/p/9936252.html

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