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  • Java获取http和https协议返回的json数据

    转摘:https://www.cnblogs.com/wangtj-19/p/5889056.html

    现在很多公司都是将数据返回一个json,而且很多第三方接口都是返回json数据,而且还需要使用到http协议,http协议是属于为加密的协议,而https协议需要SSL证书,https是将用户返回的信息加密处理,然而我们要获取这些数据,就需要引入SSL证书。现在我提供两个方法,帮助各位如何获取http和https返回的数据。

    获取http协议的数据的方法,如下:

    public static JSONObject httpRequest(String requestUrl, String requestMethod) {
            JSONObject jsonObject = null;
            StringBuffer buffer = new StringBuffer();
            try {

                URL url = new URL(requestUrl);
                // http协议传输
                HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();

                httpUrlConn.setDoOutput(true);
                httpUrlConn.setDoInput(true);
                httpUrlConn.setUseCaches(false);
                // 设置请求方式(GET/POST)
                httpUrlConn.setRequestMethod(requestMethod);

                if ("GET".equalsIgnoreCase(requestMethod))
                    httpUrlConn.connect();
                // 将返回的输入流转换成字符串
                InputStream inputStream = httpUrlConn.getInputStream();
                InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
                BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

                String str = null;
                while ((str = bufferedReader.readLine()) != null) {
                    buffer.append(str);
                }
                bufferedReader.close();
                inputStreamReader.close();
                // 释放资源
                inputStream.close();
                inputStream = null;
                httpUrlConn.disconnect();
                jsonObject = JSONObject.fromObject(buffer.toString());
            } catch (Exception e) {
                e.printStackTrace();
            }
            return jsonObject;
        }

    获取https协议的数据的方法,如下:

    public static JSONObject httpsRequest(String requestUrl, String requestMethod, String outputStr) {
            JSONObject jsonObject = null;
            StringBuffer buffer = new StringBuffer();
            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 httpUrlConn = (HttpsURLConnection) url.openConnection();
                httpUrlConn.setSSLSocketFactory(ssf);

                httpUrlConn.setDoOutput(true);
                httpUrlConn.setDoInput(true);
                httpUrlConn.setUseCaches(false);
                // 设置请求方式(GET/POST)
                httpUrlConn.setRequestMethod(requestMethod);

                if ("GET".equalsIgnoreCase(requestMethod))
                    httpUrlConn.connect();

                // 当有数据需要提交时
                if (null != outputStr) {
                    OutputStream outputStream = httpUrlConn.getOutputStream();
                    // 注意编码格式,防止中文乱码
                    outputStream.write(outputStr.getBytes("UTF-8"));
                    outputStream.close();
                }

                // 将返回的输入流转换成字符串
                InputStream inputStream = httpUrlConn.getInputStream();
                InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
                BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

                String str = null;
                while ((str = bufferedReader.readLine()) != null) {
                    buffer.append(str);
                }
                bufferedReader.close();
                inputStreamReader.close();
                // 释放资源
                inputStream.close();
                inputStream = null;
                httpUrlConn.disconnect();
                jsonObject = JSONObject.fromObject(buffer.toString());
            } catch (ConnectException ce) {
                log.error("Weixin server connection timed out.");
            } catch (Exception e) {
                log.error("https request error:{}", e);
            }
            return jsonObject;

        }

    获取https协议的数据和获取http协议的区别在于

       // 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 httpUrlConn = (HttpsURLConnection) url.openConnection();
                httpUrlConn.setSSLSocketFactory(ssf);

    大家有更好的方法欢迎留言分享,以上就是本次共享的内容 。还有,提示一下,如果复制中,缺失jar包,请自行下载,如果找不到,请给我留言,还有,程序是死的,人是活的,怎么方便怎么来

     
     
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  • 原文地址:https://www.cnblogs.com/bjguanmu/p/8879610.html
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