2

我正在为 android 制作应用程序，我需要使用 java 向 www.example.com 地址发出请求。问题是我需要发送 POST 参数，我一直在搜索一些信息，我发现了一些关于跨域或类似的东西。有人可以帮我处理请求并获得答案吗？

我尝试执行以下代码但不工作：

HttpClient httpclient = new DefaultHttpClient();

HttpPost httppost = new HttpPost("http://www.example.com");

try {
    // Add your data
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
    nameValuePairs.add(new BasicNameValuePair("param1", "val"));
    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

    // Execute HTTP Post Request
    HttpResponse response = httpclient.execute(httppost);

} catch (ClientProtocolException e) {
    // TODO Auto-generated catch block
} catch (IOException e) {
    // TODO Auto-generated catch block
}

解决方案：：：：：：：：：：：：：

  try {
                HttpClient client = new DefaultHttpClient();
                HttpPost post = new HttpPost("http://www.example.com");

                ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();

                postParameters.add(new BasicNameValuePair("key", "val"));
                postParameters.add(new BasicNameValuePair("key2", "val2"));


                UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(
                        postParameters);
                post.setEntity(formEntity);

                    HttpResponse response = client.execute(post);
                        //inputStreamToString method
                    String data = inputStreamToString(response.getEntity()
                            .getContent());
                    return data;
                } catch (UnsupportedEncodingException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (ClientProtocolException e) {
                    // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

inputStreamToString 方法

private String inputStreamToString(InputStream is) {
        String s = "";
        String line = "";

        // Wrap a BufferedReader around the InputStream
        BufferedReader rd = new BufferedReader(new InputStreamReader(is));

        // Read response until the end
        try {
            while ((line = rd.readLine()) != null) {
                s += line;
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        // Return full string
        return s;
    }
4

1 回答 1

3

跨域 POST 适用于提交表单的 Web 浏览器，一般不适用于 HTTP。浏览器不会将跨域发布作为安全策略。它不适用于您的情况。

于 2012-08-07T14:43:10.973 回答