HttpUrlConnection

最新推荐文章于 2025-06-07 09:42:46 发布

原创最新推荐文章于 2025-06-07 09:42:46 发布 · 142 阅读

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CC 4.0 BY-SA版权

本文介绍如何使用 Java 的 HttpURLConnection 发起 HTTP GET 请求，并处理响应。包括正常响应和重定向的情况，展示了如何读取响应内容。

try {
    //使用HttpUrlConnection
    URL url=new URL(strings[0]);
    HttpURLConnection connection=(HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");
    connection.setReadTimeout(5000);
    connection.setConnectTimeout(5000);

    if(connection.getResponseCode()==200){
        InputStream inputStream=connection.getInputStream();
        //调用工具类中的静态方法
        str=StreamToString.getString(inputStream,"utf-8");
    }else if(connection.getResponseCode()==301 || connection.getResponseCode()==302 ) {
        //拿到重定向的地址
        String newUrl=connection.getHeaderField("location");

        URL u=new URL(newUrl);
        HttpURLConnection connection1=(HttpURLConnection) u.openConnection();
        connection1.setRequestMethod("GET");
        connection1.setReadTimeout(5000);
        connection1.setConnectTimeout(5000);

        if(connection1.getResponseCode()==200){
            InputStream inputStream=connection1.getInputStream();
            //调用工具类中的静态方法
            str=StreamToString.getString(inputStream,"utf-8");
        }
    }else{

    }
} catch (Exception e) {
    e.printStackTrace();
}