java http url 读取远程文件

最新推荐文章于 2025-09-05 15:36:11 发布

原创最新推荐文章于 2025-09-05 15:36:11 发布 · 1.8k 阅读

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#java #http #url

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本文档展示了如何使用Java通过URL读取文件，包括建立HTTP连接、设置超时、处理Cookie，并使用BufferedReader逐行读取内容，最后返回完整的字符串结果。

private static String readUrlFile(String url) {
        BufferedReader reader = null;
        StringBuilder content = new StringBuilder();

        try {
            URL httpUrl = new URL(url);
            String line = null;
            CookieHandler.setDefault(new CookieManager(null, CookiePolicy.ACCEPT_ALL));
            HttpURLConnection connection = (HttpURLConnection) httpUrl.openConnection();
            connection.setRequestMethod("GET");
            connection.setConnectTimeout(10 * 1000);
            connection.setReadTimeout(10 * 1000);
            connection.connect();
            reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));


            while ((line = reader.readLine()) != null) {
                content.append(line + "\n");
            }
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException ioe) {
                    ioe.printStackTrace();
                }
            }
        }
        return content.toString();
    }


    public static void main(String[] args) throws Exception {
        String url = "https://blog.youkuaiyun.com/qiaobing1226/article/details/122867476";
        String content = readUrlFile(url);
        System.out.println(content);
    }