如何将Java HttpPost对象显示为字符串

Question

我正在Android中创建一个HttpPost对象，用于与客户端操作的服务器通信。不幸的是，服务器没有向我们提供非常有用的错误消息；我想把HttpPost对象的内容看作一个字符串，这样我就可以把它发送给我们的客户，他可以把它与他的期望进行比较。

如何将HttpPost对象转换为反映其到达服务器时的外观的字符串？

Answer 1

应在执行后使用

public static String httpPostToString(HttpPost httppost) {
    StringBuilder sb = new StringBuilder();
    sb.append("nRequestLine:");
    sb.append(httppost.getRequestLine().toString());
    int i = 0;
    for(Header header : httppost.getAllHeaders()){
      if(i == 0){
          sb.append("nHeader:");
      }
        i++;
        for(HeaderElement element : header.getElements()){
            for(NameValuePair nvp :element.getParameters()){
                sb.append(nvp.getName());
                sb.append("=");
                sb.append(nvp.getValue());
                sb.append(";");
            }
        }
    }
    HttpEntity entity = httppost.getEntity();
    String content = "";
    if(entity != null){
        try {
            content = IOUtils.toString(entity.getContent());
        } catch (Exception e) {
            e.printStackTrace();
        } 
    }
    sb.append("nContent:");
    sb.append(content);

    return sb.toString();
}

片段

Answer 2

我通常用这种方式发帖（服务器的答案是一个JSON对象）：

    try {
        postJSON.put("param1", param1);
        postJSON.put("param2",param2);
    } catch (JSONException e) {
        e.printStackTrace();
    }
    String result = JSONGetHTTP.postData(url);
    if (result != null) {
        try {
            JSONObject jObjec = new JSONObject(result);
            }
        } catch (JSONException e) {
            Log.e(TAG, "Error setting data " + e.toString());
        }
    }

postData是：

public static String postData(String url, JSONObject obj) {
    // Create a new HttpClient and Post Header
    HttpClient httpclient = null;
    try {
        HttpParams myParams = new BasicHttpParams();
        HttpConnectionParams.setConnectionTimeout(myParams, 30000);
        HttpConnectionParams.setSoTimeout(myParams, 30000);
        httpclient = new DefaultHttpClient(myParams);
    } catch (Exception e) {
        Log.e("POST_DATA", "error in httpConnection");
        e.printStackTrace();
    }
    InputStream is = null;
    try {
        HttpPost httppost = new HttpPost(url.toString());
        //Header here   httppost.setHeader();
        StringEntity se = new StringEntity(obj.toString());
        httppost.setEntity(se);
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        // // Do something with response...
        is = entity.getContent();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    // convert response to string
    BufferedReader reader = null;
    String result = null;
    try {
        reader = new BufferedReader(new InputStreamReader(is, "UTF-8"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line + "n");
        }
        result = sb.toString();
    } catch (Exception e) {
        Log.e("log_tag", "Error converting result " + e.toString());
    } finally {
        try {
            if (reader != null)
                reader.close();
            if (is != null)
                is.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    if (result != null) {
        try {
            @SuppressWarnings("unused")
            JSONObject jObjec = new JSONObject(result);
        } catch (JSONException e) {
            Log.e("log_tag", "Error parsing data " + e.toString());
        }
    }
    return result;
}

希望它能帮助

Answer 3

我实际上是用NameValuePair做HTTP-Post的。。。。。。我展示的代码用于执行HTTP-Post，然后将响应转换为String

请参阅以下方法代码：

public String postData(String url, String xmlQuery) {

final String urlStr = url;
final String xmlStr = xmlQuery;
final StringBuilder sb  = new StringBuilder();

Thread t1 = new Thread(new Runnable() {
public void run() {
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost(urlStr);

    try {
         List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
         nameValuePairs.add(new BasicNameValuePair("xml", xmlStr));
         httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
         HttpResponse response = httpclient.execute(httppost);
         Log.d("Vivek", response.toString());
        HttpEntity entity = response.getEntity();
        InputStream i = entity.getContent();
        Log.d("Vivek", i.toString());
        InputStreamReader isr = new InputStreamReader(i);
        BufferedReader br = new BufferedReader(isr);
        String s = null;

        while ((s = br.readLine()) != null) {
            Log.d("YumZing", s);
            sb.append(s);
        }

        Log.d("Check Now",sb+"");


        } catch (ClientProtocolException e) {
                e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } 
            }
        });
        t1.start();
        try {
            t1.join();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        System.out.println("Getting from Post Data Method "+sb.toString());
        return sb.toString();
    }