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我想知道是否有某种通用方法可以使用 Java / Android 进行网络调用,因为我正在为我目前的策略而苦苦挣扎。我目前正在尝试这个:

public static File synchronousConnection(String url, String requestMethod, byte[] requestData, Map<String, String> headers)
{
    File returnData = null;
    try
    {
        URL url = new URL(url);
        HttpURLConnection connection = (HttpURLConnection)url.openConnection();
        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setRequestMethod(requestMethod);
        if(requestData != null && requestData.length > 0)connection.setRequestProperty("Content-Length", Integer.toString(requestData.length));
        if(headers != null)for(String key : headers.keySet())connection.setRequestProperty(key, headers.get(key));
        //connection.connect();

        if(requestData != null && requestData.length > 0)
        {
            DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
            outputStream.write(requestData);

            outputStream.flush();
            outputStream.close();
        }

        //String response = inputStreamToString(url.openStream());
        //System.out.println("Response: " + response);

        int statusCode = connection.getResponseCode();

        connection.disconnect();

        System.out.println("Status code: " + statusCode);

        //returnData = response;
    }
    catch(IOException e)
    {
        System.out.println("IO Exception in connections\n" + e.getLocalizedMessage());
        e.printStackTrace();
    }
    catch(Exception e)
    {
        System.out.println("Invalid information for network connection\n" + e.getLocalizedMessage());
        e.printStackTrace();
    }
    return returnData;
}

我有相当多的组件被注释掉,因为它们似乎会干扰过程或提出问题,即使它们在其他示例中也是如此。至于inputStreamToString(InputStream),那是我按照它所说的去做的方法之一。

给定函数的输入参数,是否有通用的 URL 连接方式?目前,我真的很难让任何连接正常工作,而且对于每个请求都必须以自定义方式做事很奇怪。POST此外,即使我的 API 确实返回了响应正文,我似乎也无法从请求中获取任何响应数据。

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0 回答 0