Java 使用名称值对将 Json POST 发送到服务器

Sending Json POST to server using name value pair

提问by Amrit Pal Singh

I am sending Json Post request to server to through url: http://www.xyz.com/login

我通过 url 向服务器发送 Json Post 请求：http: //www.xyz.com/login

request structure:

请求结构：

{"requestdata":{"password":"abc","devicetype":"phone","username":"[email protected]","locale":"in"},"requestcode":10}

Code Snapshot:

代码快照：

MainActivity:

主要活动：

    // Building post parameters
    // key and value pair
    List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();
    nameValuePair.add(new BasicNameValuePair("requestcode", "10"));
    nameValuePair.add(new BasicNameValuePair("devicetype", "phone"));
    nameValuePair.add(new BasicNameValuePair("locale", "in"));
    nameValuePair.add(new BasicNameValuePair("username", "[email protected]"));
    nameValuePair.add(new BasicNameValuePair("password", "abc"));

    RestPost post = new RestPost(loginUrl, nameValuePair);
    String Response = post.postData();
    Log.i("Response:", Response);

RestPost class

RestPost 类

    import java.io.BufferedReader;
      import java.io.IOException;
      import java.io.InputStream;
      import java.io.InputStreamReader;
      import java.util.List;
      import org.apache.http.HttpEntity;
      import org.apache.http.HttpResponse;
      import org.apache.http.NameValuePair;
      import org.apache.http.StatusLine;
      import org.apache.http.client.ClientProtocolException;
      import org.apache.http.client.HttpClient;
      import org.apache.http.client.entity.UrlEncodedFormEntity;
      import org.apache.http.client.methods.HttpPost;
      import org.apache.http.impl.client.DefaultHttpClient;
      import android.util.Log;

     public class RestPost {
       String url;
       List<NameValuePair> nameValuePairs;

    public RestPost(String str, List<NameValuePair> params) {
        this.url = str;
        this.nameValuePairs = params;
    }

    public String postData() {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(this.url);
        StringBuilder builder = new StringBuilder();

        try {
            httppost.setEntity(new UrlEncodedFormEntity(this.nameValuePairs));
            HttpResponse response = httpclient.execute(httppost);
            StatusLine statusLine = response.getStatusLine();
            int statusCode = statusLine.getStatusCode();
            Log.d("RestClient", "Status Code : " + statusCode);

            HttpEntity entity = response.getEntity();
            InputStream content = entity.getContent();
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    content));
            String line;
            while ((line = reader.readLine()) != null) {
                builder.append(line);
            }

        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
        } catch (IOException e) {
            // TODO Auto-generated catch block
        }
        return builder.toString();
    }
}

But I'm not getting appropriate response, could anyone help me in sending appropriate format for getting server response. Thanks in advance.

但是我没有得到适当的响应，任何人都可以帮助我发送适当的格式以获取服务器响应。提前致谢。

Response which I'm getting:

我得到的回应：

{"error":{"resultCode":"400","status":"Invalid Request format"}}

采纳答案by MungoRae

You are currently sending the JSON in the form of

您当前正在以以下形式发送 JSON

{
    "requestcode": "10",
    "devicetype": "phone",
    "locale": "in",
    "username": "[email protected]",
    "password": "abc"
}

Which isn't the form the server is asking for. Try creating a string of the JSON you want to send. Then use:

这不是服务器要求的形式。尝试创建要发送的 JSON 字符串。然后使用：

httppost.setEntity(new StringEntity(jsonString, "UTF8"));
httppost.setHeader("Content-type", "application/json");

To send the string to the server.

将字符串发送到服务器。

回答by SSS

I'm using AndroidHttpClient to post the request

我正在使用 AndroidHttpClient 发布请求

AndroidHttpClient httpClient = AndroidHttpClient.newInstance("User Agent");

URL urlObj = new URL(url);
HttpHost host = new HttpHost(urlObj.getHost(), urlObj.getPort(), urlObj.getProtocol());
AuthScope scope = new AuthScope(urlObj.getHost(), urlObj.getPort());
HttpContext credContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost (url);
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairsArrayList));

// Execute post request and get http response
HttpResponse httpResponse = httpClient.execute(host, httpPost, credContext);
httpClient.close();

This works perfectly for me.

这对我来说非常有效。

回答by abc

AndroidHttpClient http = AndroidHttpClient.new Instance("hai");