downloadFile

最新推荐文章于 2025-06-11 16:51:37 发布

minwei爱zhuang

最新推荐文章于 2025-06-11 16:51:37 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/yyywww423/article/details/79937782

本文介绍了一个使用Java实现的HTTP文件下载方法。通过CloseableHttpClient进行网络请求，利用HttpGet获取指定URL的内容，并将其写入到本地文件中。文章详细展示了如何处理网络响应、文件流操作及异常情况。

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public void downloadFile(String url, File targetFile) {
    CloseableHttpClient httpClient = HttpClients.createDefault();
    CloseableHttpResponse response = null;

    try {
        HttpGet httpGet = new HttpGet(url);
        response = httpClient.execute(httpGet);
        StatusLine statusLine = response.getStatusLine();
        if (statusLine.getStatusCode() == 200) {
            FileOutputStream outputStream = new FileOutputStream(targetFile);
            InputStream inputStream = response.getEntity().getContent();
            byte[] buff = new byte[4096];
            boolean var10 = false;

            int counts;
            while((counts = inputStream.read(buff)) != -1) {
                outputStream.write(buff, 0, counts);
            }

            outputStream.flush();
            outputStream.close();
        }
    } catch (Exception var19) {
        ;
    } finally {
        try {
            if (response != null) {
                response.close();
            }

            if (httpClient != null) {
                httpClient.close();
            }
        } catch (IOException var18) {
            var18.printStackTrace();
        }

    }

}