Java封装servlet发送请求（一）

/**

     * 发送https请求

     * 

     * @param requestUrl 请求地址

     * @param requestMethod 请求方式（GET、POST）

     * @param outputStr 提交的数据

     * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)

     */

    public static JSONObject httpsRequest(String requestUrl, String requestMethod, String outputStr) {

        JSONObject jsonObject = null;

        try {

            // 创建SSLContext对象，并使用我们指定的信任管理器初始化

            TrustManager[] tm = { new MyX509TrustManager() };

            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");

            sslContext.init(null, tm, new java.security.SecureRandom());

            // 从上述SSLContext对象中得到SSLSocketFactory对象

            SSLSocketFactory ssf = sslContext.getSocketFactory();



            URL url = new URL(requestUrl);

            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();

            conn.setSSLSocketFactory(ssf);

            

            conn.setDoOutput(true);

            conn.setDoInput(true);

            conn.setUseCaches(false);

            // 设置请求方式（GET/POST）

            conn.setRequestMethod(requestMethod);



            // 当outputStr不为null时向输出流写数据

            if (null != outputStr) {

                OutputStream outputStream = conn.getOutputStream();

                // 注意编码格式

                outputStream.write(outputStr.getBytes("UTF-8"));

                outputStream.close();

            }



            // 从输入流读取返回内容

            InputStream inputStream = conn.getInputStream();

            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");

            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

            String str = null;

            StringBuffer buffer = new StringBuffer();

            while ((str = bufferedReader.readLine()) != null) {

                buffer.append(str);

            }



            // 释放资源

            bufferedReader.close();

            inputStreamReader.close();

            inputStream.close();

            inputStream = null;

            conn.disconnect();

            jsonObject = JSONObject.fromObject(buffer.toString());

        } catch (ConnectException ce) {

            log.error("连接超时：{}", ce);

        } catch (Exception e) {

            log.error("https请求异常：{}", e);

        }

        return jsonObject;

    }