資訊_POST請求網絡數據

//post請求數據
    public static String httpPost(String str1, String str2) {

        try {
            //設置url
            URL url = new URL(str1);
            //獲取HttpURLConnextion
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            //提交模式
            connection.setRequestMethod("POST");
            //連接超時單位毫秒
            connection.setConnectTimeout(5000);
            //讀取超時單位毫秒
            connection.setReadTimeout(5000);
            //發送Post請求必須設置如下兩行
            connection.setDoOutput(true);
            connection.setDoInput(true);
            //獲取URLConnection對象對應的輸出流
            PrintWriter writer = new PrintWriter(connection.getOutputStream());
            //發送請求
            writer.write(str2);
            //關閉流
            writer.flush();
            //刷新
            //獲取請求碼
            int code = connection.getResponseCode();
            //判斷是否成功
            if (code == 200) {
                //讀取數據
                InputStream stream = connection.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(stream, "utf-8"));
                //拼接數符串
                StringBuilder builder = new StringBuilder();
                String s = "";
                //讀取數據
                while ((s = reader.readLine()) != null) {
                    //拼接字符串
                    builder.append(s);
                }

                return builder.toString();
            }
            //關閉連接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }