90.android 簡單的HttpURLConnection使用from-data請求(POST請求)+解決WIFI無法使用，重定向

//很簡單，直接上代碼：

 

public String post(String httpsUrl, String params) {
    String result = null;
    try {
        URL url = new URL(httpsUrl); // 解析httpsUrl，生成url對象
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setRequestMethod("POST");
        conn.setUseCaches(false);
        conn.connect();
        conn.getOutputStream().write(params.getBytes());
        conn.getOutputStream().flush();
        conn.getOutputStream().close();

        Log.e("TAG", "ResponseCode=" + conn.getResponseCode());
        if (conn.getResponseCode() == 200) {
            InputStream input = conn.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(input));
            result = bufferedReader.readLine();
            input.close();
        }
    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return result;
}

//在點擊事件裏調用：

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.mButton:
            //這個data是自己拼接的表單，根據自己的需要
            final String data = "grant_type=password" + "&username=9371***" + "&password=***" + "&client_secret=server" + "&client_id=server" + "&scope=server";
            new Thread(new Runnable() {
                @Override
                public void run() {
                    String post = post("這裏放你的url", data);
                    Log.e("TAG", post + "");
                }
            }).start();
            break;
    }
}

 

//簡單的請求就完成了，下面是我的升級版的，加了一些請求返回值成功或者失敗的判斷，錯誤的判斷：

    //發起網絡請求
    public String jsonPost(final String path, final String string) {
        String result = "";
        OutputStream os = null;
        try {
            URL url = new URL(path);
// 然後我們使用httpPost的方式把lientKey封裝成Json數據的形式傳遞給服務器
// 在這裏呢我們要封裝的時這樣的數據
// 我們把JSON數據轉換成String類型使用輸出流向服務器寫
// 現在呢我們已經封裝好了數據,接着呢我們要把封裝好的數據傳遞過去
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(5000);
// 設置允許輸出
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setRequestMethod("POST");
            conn.setUseCaches(false);
            os = conn.getOutputStream();
            os.write(string.getBytes());
            os.flush();
// 定義BufferedReader輸入流來讀取URL的響應

            Log.e("TAGH1", conn.getResponseCode() + "");
            if (conn.getResponseCode() == 200) {
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                result = bufferedReader.readLine();
            }
        } catch (SocketTimeoutException e) {
// Log.i("錯誤", "連接時間超時");
            e.printStackTrace();
            return "錯誤";
        } catch (MalformedURLException e) {
// Log.i("錯誤", "jdkfa");
            e.printStackTrace();
            return "錯誤";
        } catch (ProtocolException e) {
// Log.i("錯誤", "jdkfa");
            e.printStackTrace();
            return "錯誤";
        } catch (IOException e) {
// Log.i("錯誤", "jdkfa");
            e.printStackTrace();
            return "錯誤";
        }// 使用finally塊來關閉輸出流、輸入流
        finally {
            try {
                if (os != null) {
                    os.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }

//在點擊事件裏調用：

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.mButton:
            //這個data是自己拼接的表單，根據自己的需要
            final String data = "grant_type=password" + "&username=9371***" + "&password=***" + "&client_secret=server" + "&client_id=server" + "&scope=server";
            new Thread(new Runnable() {
                @Override
                public void run() {
                    String s = jsonPost("這裏放你的url", data);
                    Log.e("TAG", s + "");
                }
            }).start();
            break;
    }
}

//簡潔版  直接返回成功的信息或錯誤的信息： 

    /*
     * 方法名：jsonPost(final String path, final JSONObject json)
     * 功    能：發起網絡請求，form提交
     * 參    數：String path, String string
     * 返回值：String
     */
    public String jsonPost(final String path, final String string) throws IOException {
        String result = "";
        OutputStream os = null;
        URL url = null;
        HttpURLConnection conn = null;
        url = new URL(path);

        // 然後我們使用httpPost的方式把lientKey封裝成Json數據的形式傳遞給服務器
// 在這裏呢我們要封裝的時這樣的數據
// 我們把JSON數據轉換成String類型使用輸出流向服務器寫
// 現在呢我們已經封裝好了數據,接着呢我們要把封裝好的數據傳遞過去

        conn = (HttpURLConnection) url.openConnection();
//            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); //設置請求體的類型是文本類型
            // 設置通用的請求屬性
//            conn.setRequestProperty("accept", "*/*");
//            conn.setRequestProperty("connection", "Keep-Alive");
//            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setConnectTimeout(5000);//設置連接超時
            conn.setReadTimeout(5000);//設定讀取超時
            conn.setDoInput(true);//設置允許輸入
            conn.setDoOutput(true);//設置允許輸出
            conn.setRequestMethod("POST");//設置請求方式
            conn.setUseCaches(false);//設置緩存
            os = conn.getOutputStream(); //獲得輸出流，向服務器寫入數據
        conn.setConnectTimeout(5000);//設置連接超時
	conn.setReadTimeout(5000);//設定讀取超時
	conn.setDoInput(true);//設置允許輸入
	conn.setDoOutput(true);//設置允許輸出
	conn.setRequestMethod("POST");//設置請求方式
	conn.setUseCaches(false);//設置緩存
        os = conn.getOutputStream();
        os.write(string.getBytes());
        os.flush();
// 定義BufferedReader輸入流來讀取URL的響應
        Log.i("LoginActivity", "登錄ResponseCode：" + conn.getResponseCode());
        if (conn.getResponseCode() == 200) {
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            result = bufferedReader.readLine();
        } else {
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(conn.getErrorStream()));
            result = bufferedReader.readLine();
        }
        if (os != null) {
            os.close();
        }
        Log.i("LoginActivity", "請求Token返回信息：" + result);
        return result;
    }

//拼接參數 表單請求，解決WIFI無法使用，重定向：

 /**
     * 方法名：jsonPost(final String path, final JSONObject json)
     * 功    能：拼接請求參數,發起網絡請求，form提交
     * 參    數：String path, String uid, String pwd
     * 返回值：String
     */
    public static String jsonPost(final String path, String uid, String pwd) {
        LinkedHashMap<String, String> params = new LinkedHashMap<>();
        params.put("grant_type", "password");
        params.put("username", uid);
        params.put("password", Md5.MD5(pwd));
        params.put("client_secret", "server");
        params.put("client_id", "server");
        params.put("scope", "server");
        // 拼接請求參數
        StringBuffer buffer = new StringBuffer();
        for (Map.Entry<String, String> entry : params.entrySet()) {
            buffer.append(entry.getKey());
            buffer.append('=');
            buffer.append(entry.getValue());
            buffer.append('&');
        }
        buffer.deleteCharAt(buffer.length() - 1);
        final String data = buffer.toString();

        XLog.i("AuthUtil", "獲取Token地址：" + path + " 獲取Token參數：" + data);
        XLog.i("AuthUtil", "獲取Token 密碼MD5：" + Md5.MD5(Global.userInfo.getPwds()));
        String result = "";
        OutputStream os = null;
        URL url = null;
        HttpURLConnection conn = null;
        try {
            url = new URL(path);
            conn = (HttpURLConnection) url.openConnection();
//            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); //設置請求體的類型是文本類型
            // 設置通用的請求屬性
//            conn.setRequestProperty("accept", "*/*");
//            conn.setRequestProperty("connection", "Keep-Alive");
//            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setConnectTimeout(5000);//設置連接超時
            conn.setReadTimeout(5000);//設定讀取超時
            conn.setDoInput(true);//設置允許輸入
            conn.setDoOutput(true);//設置允許輸出
            conn.setRequestMethod("POST");//設置請求方式
            conn.setUseCaches(false);//設置緩存
            os = conn.getOutputStream(); //獲得輸出流，向服務器寫入數據
            os.write(data.getBytes());
            os.flush();
            //定義BufferedReader輸入流來讀取URL的響應
            XLog.i("AuthUtil", "請求Token ResponseCode：" + conn.getResponseCode());
            if (conn.getResponseCode() == 200) {
                XLog.i("AuthUtil", "請求Token返回成功信息：" + result);
                if (!url.getHost().equals(conn.getURL().getHost())) { //連接被重定向了！需要指引用戶去登錄WiFi
                    return "當前WIFI無法使用,需要認證!";
                } else {
                    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                    result = bufferedReader.readLine();
                }
            } else if (conn.getResponseCode() == 400) {
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(conn.getErrorStream()));
                result = bufferedReader.readLine();
                XLog.e("AuthUtil", "請求Token返回錯誤信息：" + result);
                try {
                    JSONObject jsonObject = new JSONObject(result);
                    String message = jsonObject.optString("message");
                    return message;
                } catch (JSONException e) {
                    e.printStackTrace();
                    XLog.e("AuthUtil", "請求Token返回錯誤信息：" + e.toString());
                }
            } else {
                XLog.e("AuthUtil", "請求Token返回錯誤信息：" + conn.getResponseCode());
                return "服務器內部錯誤";
            }

            if (os != null) {
                os.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
            XLog.e("AuthUtil", "請求Token返回錯誤信息：" + e.toString());
        }
        return result;
    }
//-----------------------------------------------------------------------完----------------------------------------------------------------