Android PHP服务网络交互POST

最新推荐文章于 2023-05-04 13:18:48 发布

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本文提供了一个使用Java实现的文件上传示例代码，通过HTTP POST请求发送文件和参数至服务器。该方法设置请求头，使用DataOutputStream写入数据，并处理文件流。

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public String post(String url, HashMap<String, String> param, List<File> files, String fileName) {
        String result = "";
        String end = "\r\n";
        String twoHyphens = "--";
        String boundary = "ABCDEFG";
        try {
            URL requestUrl = new URL(url);
            HttpURLConnection httpURLConnection = (HttpURLConnection) requestUrl.openConnection();
            httpURLConnection.setChunkedStreamingMode(128 * 1024);//128k防止内存过高
            //允许输入输出流
            httpURLConnection.setDoInput(true);
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setUseCaches(false);

            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setRequestProperty("Connection", "Keep-Alive");
            httpURLConnection.setRequestProperty("Charset", "UTF-8");
            httpURLConnection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
            DataOutputStream dos = new DataOutputStream(httpURLConnection.getOutputStream());

            //字段
            Iterator iterator = param.entrySet().iterator();
            while (iterator.hasNext()) {
                dos.writeBytes(twoHyphens + boundary + end);
                Map.Entry entry = (Map.Entry) iterator.next();
                dos.writeBytes("Content-Disposition:form-data;name=\"" + entry.getKey() + "\"" + end);
                dos.writeBytes(end);
                dos.writeBytes(URLEncoder.encode(entry.getValue().toString(),"UTF-8"));
                dos.writeBytes(end);
            }

            //文件
            for (File file : files) {
                dos.writeBytes(twoHyphens + boundary + end);
                dos.writeBytes("Content-Disposition:form-data;name=\"" + fileName + "\";filename=\"" + file.getName() + "\"" + end);
                dos.writeBytes(end);

                FileInputStream fis = new FileInputStream(file);
                byte[] buffer = new byte[8 * 1024];
                int count = 0;
                while ((count = fis.read(buffer)) != -1) {
                    dos.write(buffer, 0, count);
                }
                fis.close();
                dos.writeBytes(end);
            }

            dos.writeBytes(twoHyphens + boundary + twoHyphens + end);

            dos.flush();

            InputStream is = httpURLConnection.getInputStream();
            InputStreamReader isr = new InputStreamReader(is, "UTF-8");
            BufferedReader br = new BufferedReader(isr);
            result = br.readLine();
            dos.close();
            is.close();

        } catch (Exception e) {
            e.printStackTrace();
            Log.e("Android", e.getLocalizedMessage());
        }
        return result;
    }

public String post(String url, HashMap<String, String> param, List<File> files, String fileName) {}

url：请求地址

param：请求参数

files：要传送的文件

fileName：接受文件要用的名字

自己撸的服务端是PHP的

感觉自己撸的传输速度还是比较快的