Java Android HttpUrlConnection不工作_Java_Android_Httpclient_Httpurlconnection

Java Android HttpUrlConnection不工作

java android

Java Android HttpUrlConnection不工作,java,android,httpclient,httpurlconnection,Java,Android,Httpclient,Httpurlconnection,基本上，我正在尝试通过Android应用程序连接到web界面我使用HttpClient成功地向表单发送了命令。但是，我希望按照这里的建议使用HttpUrlConnection来实现这一点，目的是实现更快、更节能的连接 URL url = new URL("http://" + mIpAddress + ":" + mPort + "/command.html"); HttpURLConnection connection = (HttpURLConnection) url.openConnec

基本上，我正在尝试通过Android应用程序连接到web界面

我使用HttpClient成功地向表单发送了命令。但是，我希望按照这里的建议使用HttpUrlConnection来实现这一点，目的是实现更快、更节能的连接

URL url = new URL("http://" + mIpAddress + ":" + mPort + "/command.html");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setReadTimeout(10000);
connection.setConnectTimeout(15000);
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);

OutputStream os = connection.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
writer.write(URLEncoder.encode("parameter=" + value, "UTF-8");
writer.flush();
writer.close();
os.close();

connection.connect();

编辑：没有引发异常，因为代码执行得很好，请求可能不是服务器所期望的格式？

您可以提供更多信息，如异常或服务器响应吗？服务器是否收到您的请求

但是，我建议您使用在

HttpUrlConnection

之上构建的连接。您可以提供更多信息，如异常或服务器响应吗？服务器是否收到您的请求

但是，我建议您使用在

HttpUrlConnection

之上构建的连接。下面是我使用HttpUrlConnection发送http请求的方法，请注意，connection.connect（）是在设置HttpUrlConnection之后，而不是在最后，setDoInput也会发出请求，而不是默认的get

    URL url = new URL(urlString);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    //conn.setReadTimeout(10000 /* milliseconds */);
    // conn.setConnectTimeout(15000 /* milliseconds */);
    //conn.setRequestMethod("GET");
    //conn.setDoInput(true);   //* uses POST
    // Starts the query
    conn.connect();
    InputStream stream = conn.getInputStream();
    //String data = convertStreamToString(stream);
    int sz = stream.available();
    byte[] b = new byte[sz];
    stream.read(b);
    stream.close();
    String data = new String(b);

下面是我使用HttpURLConnection发送http请求的方法，注意connection.connect（）是在设置HttpURLConnection之后，而不是在最后，setDoInput也会发出请求，而不是默认的get

    URL url = new URL(urlString);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    //conn.setReadTimeout(10000 /* milliseconds */);
    // conn.setConnectTimeout(15000 /* milliseconds */);
    //conn.setRequestMethod("GET");
    //conn.setDoInput(true);   //* uses POST
    // Starts the query
    conn.connect();
    InputStream stream = conn.getInputStream();
    //String data = convertStreamToString(stream);
    int sz = stream.available();
    byte[] b = new byte[sz];
    stream.read(b);
    stream.close();
    String data = new String(b);

投递工作需要Connection.getInputStream（）。已修复。

connection.getInputStream（）是POST工作所必需的。已修复。

只需添加一行即可

connection.getRequestMethod();

它会起作用的

我不知道为什么，但在我花了一整天的时间之后，这对我来说很有效

只需添加一行即可

connection.getRequestMethod();

它会起作用的

我不知道为什么，但在我花了一整天的时间之后，这对我来说很有效

使用HttpUrlConnection类共享数据下面是一个简单的连接类，它将帮助您连接WS，并使用JSON解析传递数据

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class CommonConnectionClass {
    JSONObject jsonObject;
    public JSONObject getConnection(String u,JSONObject object){
        try {

            //URL url=new URL("https://e-gurukulam.000webhostapp.com/public_html/project/login.php"+u+".php");
            URL url=new URL("http://"+new Connection_Url_Setter().urlIp+"/classroom/"+u+".php");
           // URL url=new URL("http://192.168.43.120/classroom/"+u+".php");
            HttpURLConnection httpURLConnection=(HttpURLConnection)url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setRequestProperty("Content-Type","application/json; charset=utf-8");
            httpURLConnection.setRequestProperty("Accept","application/json; charset=utf-8");
            httpURLConnection.setDoInput(true);
            httpURLConnection.setDoOutput(true);
            httpURLConnection.connect();

            if(object!=null) {
                DataOutputStream dataOutputStream = new DataOutputStream(httpURLConnection.getOutputStream());
                dataOutputStream.write(object.toString().getBytes());

            }
            int code=httpURLConnection.getResponseCode();
            if(code== HttpURLConnection.HTTP_OK){
                String inputLine;
                StringBuilder stringBuilder=new StringBuilder();


                BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()));
                while((inputLine=bufferedReader.readLine())!=null){
                    stringBuilder.append(inputLine);
                }
                jsonObject=new JSONObject(stringBuilder.toString());
            }


        } catch (Exception e) {
            e.printStackTrace();
        }


        return jsonObject;
    }
}

要使用这个类，我使用Asyn类，比如

class userNameFetchTask extends AsyncTask<Void, Void, JSONObject> {
            JSONObject object, jsonObject, json;
            JSONArray jsonArray;
            ArrayList<CreateGroupModel> lidList = new ArrayList<>();
            String lid, name;

            @Override
            protected void onPreExecute() {
                jsonObject = new JSONObject();
                try {
                    jsonObject.put("lid", sp.getString("lid", null));
                } catch (JSONException e) {
                    e.printStackTrace();
                }
                super.onPreExecute();
            }

            @Override
            protected JSONObject doInBackground(Void... voids) {
                object = new JSONObject();
                CommonConnectionClass commonConnectionClass = new CommonConnectionClass();
                object = commonConnectionClass.getConnection("selectUserForGroup", jsonObject);
                return object;
            }

            @Override
            protected void onPostExecute(JSONObject jsonObject) {
                super.onPostExecute(jsonObject);
                jsonArray = new JSONArray();
                try {
                    jsonArray = jsonObject.getJSONArray("response");
                    for (int i = 0; i < jsonArray.length(); i++) {

                        CreateGroupModel model = new CreateGroupModel();

                        json = jsonArray.getJSONObject(i);
                        model.setLid(json.getString("relative_lid"));
                        model.setName(json.getString("name"));
                        model.setEmail(json.getString("email"));
                        model.setImage(json.getString("image"));

                        lidList.add(model);
                    }
                    viewstudentsadapterForCreateGroup viewstudentsadapterForCreateGroup = new viewstudentsadapterForCreateGroup(getApplicationContext(), lidList, createGroup_Activity.this);
                    listView.setAdapter(viewstudentsadapterForCreateGroup);

                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
    }

类userNameFetchTask扩展了AsyncTask{
JSONObject对象，JSONObject，json；
JSONArray JSONArray；
ArrayList lidList=新的ArrayList（）；
字符串盖子，名称；
@凌驾
受保护的void onPreExecute（）{
jsonObject=新的jsonObject（）；
试一试{
jsonObject.put（“lid”，sp.getString（“lid”，null））；
}捕获（JSONException e）{
e、 printStackTrace（）；
}
super.onPreExecute（）；
}
@凌驾
受保护的JSONObject doInBackground（无效…无效）{
object=新的JSONObject（）；
CommonConnectionClass CommonConnectionClass=新的CommonConnectionClass（）；
object=commonConnectionClass.getConnection（“selectUserForGroup”，jsonObject）；
返回对象；
}
@凌驾
受保护的void onPostExecute（JSONObject JSONObject）{
super.onPostExecute（jsonObject）；
jsonArray=新的jsonArray（）；
试一试{
jsonArray=jsonObject.getJSONArray（“响应”）；
for（int i=0；i

使用HttpUrlConnection类共享数据下面是一个简单的连接类，它将帮助您连接WS，并使用JSON解析传递数据

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class CommonConnectionClass {
    JSONObject jsonObject;
    public JSONObject getConnection(String u,JSONObject object){
        try {

            //URL url=new URL("https://e-gurukulam.000webhostapp.com/public_html/project/login.php"+u+".php");
            URL url=new URL("http://"+new Connection_Url_Setter().urlIp+"/classroom/"+u+".php");
           // URL url=new URL("http://192.168.43.120/classroom/"+u+".php");
            HttpURLConnection httpURLConnection=(HttpURLConnection)url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setRequestProperty("Content-Type","application/json; charset=utf-8");
            httpURLConnection.setRequestProperty("Accept","application/json; charset=utf-8");
            httpURLConnection.setDoInput(true);
            httpURLConnection.setDoOutput(true);
            httpURLConnection.connect();

            if(object!=null) {
                DataOutputStream dataOutputStream = new DataOutputStream(httpURLConnection.getOutputStream());
                dataOutputStream.write(object.toString().getBytes());

            }
            int code=httpURLConnection.getResponseCode();
            if(code== HttpURLConnection.HTTP_OK){
                String inputLine;
                StringBuilder stringBuilder=new StringBuilder();


                BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()));
                while((inputLine=bufferedReader.readLine())!=null){
                    stringBuilder.append(inputLine);
                }
                jsonObject=new JSONObject(stringBuilder.toString());
            }


        } catch (Exception e) {
            e.printStackTrace();
        }


        return jsonObject;
    }
}

要使用这个类，我使用Asyn类，比如

class userNameFetchTask extends AsyncTask<Void, Void, JSONObject> {
            JSONObject object, jsonObject, json;
            JSONArray jsonArray;
            ArrayList<CreateGroupModel> lidList = new ArrayList<>();
            String lid, name;

            @Override
            protected void onPreExecute() {
                jsonObject = new JSONObject();
                try {
                    jsonObject.put("lid", sp.getString("lid", null));
                } catch (JSONException e) {
                    e.printStackTrace();
                }
                super.onPreExecute();
            }

            @Override
            protected JSONObject doInBackground(Void... voids) {
                object = new JSONObject();
                CommonConnectionClass commonConnectionClass = new CommonConnectionClass();
                object = commonConnectionClass.getConnection("selectUserForGroup", jsonObject);
                return object;
            }

            @Override
            protected void onPostExecute(JSONObject jsonObject) {
                super.onPostExecute(jsonObject);
                jsonArray = new JSONArray();
                try {
                    jsonArray = jsonObject.getJSONArray("response");
                    for (int i = 0; i < jsonArray.length(); i++) {

                        CreateGroupModel model = new CreateGroupModel();

                        json = jsonArray.getJSONObject(i);
                        model.setLid(json.getString("relative_lid"));
                        model.setName(json.getString("name"));
                        model.setEmail(json.getString("email"));
                        model.setImage(json.getString("image"));

                        lidList.add(model);
                    }
                    viewstudentsadapterForCreateGroup viewstudentsadapterForCreateGroup = new viewstudentsadapterForCreateGroup(getApplicationContext(), lidList, createGroup_Activity.this);
                    listView.setAdapter(viewstudentsadapterForCreateGroup);

                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
    }

类userNameFetchTask扩展了AsyncTask{
JSONObject对象，JSONObject，json；
JSONArray JSONArray；
ArrayList lidList=新的ArrayList（）；
字符串盖子，名称；
@凌驾
受保护的void onPreExecute（）{
jsonObject=新的jsonObject（）；
试一试{
jsonObject.put（“lid”，sp.getString（“lid”，null））；
}捕获（JSONException e）{
e、 printStackTrace（）；
}
super.onPreExecute（）；
}
@凌驾
受保护的JSONObject doInBackground（无效…无效）{
object=新的JSONObject（）；
CommonConnectionClass CommonConnectionClass=新的CommonConnectionClass（）；
object=commonConnectionClass.getConnection（“selectUserForGroup”，jsonObject）；
返回对象；
}
@凌驾
受保护的void onPostExecute（JSONObject JSONObject）{
super.onPostExecute（jsonObject）；
jsonArray=新的jsonArray（）；
试一试{
jsonArray=jsonObject.getJSONArray（“响应”）；
for（int i=0；i