Java Http GET POST发送请求

Java Http GET POST发送请求

本文写了1个java 发送GET请求以及2个java 发送POST请求，新手，不喜勿喷！

背景：

这是一个使用魔宝支付的demo，首先需要移动端提交商城订单，请求平台签名接口进行签名并获取支付所需要的要素，对支付公司返回的信息验签后返回移动端这些要素，移动端启动支付公司SDK进行支付交易，后续还有接收交易结果通知消息。

说明

• GET核心：CloseableHttpClient和CloseableHttpResponse，HttpGet
• POST核心：HttpURLConnection和HttpPost

功能步骤说明

1. 第一步：GET请求从服务器签名接口进行签名操作；
2. 第二步：GET请求至魔宝支付进行获取支付所需要素；
3. 第三步：POST验签魔宝返回的签名信息，防篡改

静态变量

• 订单信息：private static String tranData = “XML订单信息”;
• 签名接口：private static String signUrl = “http://10.3.30.17:8099/chpay/v1/pay/mobao/sign“;
• 验签接口private static String verifyUrl = “http://10.3.30.17:8099/chpay/v1/pay/mobao/signature/verify“;
• 魔宝接口：private static String mobaoUrl = “http://182.148.123.7:8132/service“;

第一步：签名

• 在交易之前需要使用支付方提供的证书进行签名交易订单
  

  ---

/***   签名订单信息*/public static JSONObject testHttpGet(String data) throws UnsupportedEncodingException {        CloseableHttpClient httpClient = HttpClients.custom().disableContentCompression().build();        StringBuffer qUrl = new StringBuffer(signUrl);        qUrl.append("?tranData=" + URLEncoder.encode(data, "UTF-8"));        HttpGet httpget = new HttpGet(new String(qUrl));        try {            CloseableHttpResponse httpResponse = httpClient.execute(httpget);            HttpEntity entity = httpResponse.getEntity();            //返回内容            String res = EntityUtils.toString(entity, "UTF-8");            return JSONObject.parseObject(res);        } catch (IOException e) {            e.printStackTrace();        }        return null;    }

第二步：获取支付要素

• 使用支付方规定的格式，签名后请求支付公司接口得到支付所需要的要素，支付公司返回要素以及签名信息

public static String getPayElements(JSONObject json) throws UnsupportedEncodingException {        if (json.containsKey("message") && json.containsKey("signature")) {            String message = json.getString("message");            String signature = json.getString("signature");            String param = "message=" + message + "&signature=" + signature;            String paramEncode = URLEncoder.encode(param, "UTF-8");            CloseableHttpClient httpClient = HttpClients.custom().disableContentCompression().build();            StringBuffer qUrl = new StringBuffer(mobaoUrl);            qUrl.append("?message=" + URLEncoder.encode(message, "UTF-8"));            qUrl.append("&signature=" + URLEncoder.encode(signature, "UTF-8"));            HttpGet httpget = new HttpGet(new String(qUrl));            try {                CloseableHttpResponse httpResponse = httpClient.execute(httpget);                HttpEntity entity = httpResponse.getEntity();                //返回内容                String res = EntityUtils.toString(entity, "UTF-8");                return res;            } catch (IOException e) {                e.printStackTrace();            }        }        return null;    }

第三步：验签

• 获取支付要素时支付公司返回签名信息，需要进行验签，防止信息被篡改。

public static JSONObject verifySign(JSONObject jsonObject) {        if (jsonObject.containsKey("message") && jsonObject.containsKey("signature")) {            String message = jsonObject.getString("message");            String signature = jsonObject.getString("signature");            try {                //创建连接                URL url = new URL(verifyUrl);                HttpURLConnection connection = (HttpURLConnection) url                        .openConnection();                connection.setDoOutput(true);                connection.setDoInput(true);                connection.setRequestMethod("POST");                connection.setUseCaches(false);                connection.setInstanceFollowRedirects(true);//                connection.setRequestProperty("Accept", "application/json"); // 设置接收数据的格式                connection.setRequestProperty("Content-Type", "application/json");                connection.connect();                //POST请求                DataOutputStream out = new DataOutputStream(connection.getOutputStream());                JSONObject obj = new JSONObject();                obj.put("message", message);                obj.put("signature", signature);                out.writeBytes(obj.toString());                out.flush();                out.close();                //读取响应                BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));                String lines;                StringBuffer sb = new StringBuffer("");                while ((lines = reader.readLine()) != null) {                    lines = new String(lines.getBytes(), "utf-8");                    sb.append(lines);                }                reader.close();                // 断开连接                connection.disconnect();                return JSONObject.parseObject(sb.toString());            } catch (MalformedURLException e) {                // TODO Auto-generated catch block                e.printStackTrace();            } catch (UnsupportedEncodingException e) {                // TODO Auto-generated catch block                e.printStackTrace();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }        return null;    }

附：另外一个POST请求方式

public static String post(String json, String url) throws Exception{        StringEntity entity = new StringEntity(json, "utf-8");        entity.setContentType("application/json");        DefaultHttpClient client = new DefaultHttpClient();        HttpPost httpPost = new HttpPost(url);        httpPost.setEntity(entity);        HttpResponse response = client.execute(httpPost);        InputStream inputStream = response.getEntity().getContent();        StringBuffer buffer = new StringBuffer();        InputStreamReader inputReader = new InputStreamReader(inputStream);        BufferedReader bufferReader = new BufferedReader(inputReader);        String str;        while ((str = bufferReader.readLine()) != null) {            buffer.append(str);        }        bufferReader.close();        String jsonOut = buffer.toString();        return jsonOut;    }

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