关于H5页面支付

主要参考https://www.bbnpay.com/index.php/guide/index

传输方式   为保证交易安全性，采用HTTP传输

提交方式   采用POST方法提交

数据格式   标准表单参数串形式

字符编码   统一采用UTF-8字符编码

签名算法   MD5

签名要求    请求和接收数据均需要校验签名，详细方法请参考 安全规范-签名算法

关于错误码表  https://www.bbnpay.com/index.php/guide/index?c=errormsg

特别注意413错误，必填的参数你没有赋值，就会报错，

要注意对sign的加密前，要对参数进行ASKII的排序

代码如下

public static String formatUrlMap(Map, Object> paraMap, boolean urlEncode, boolean keyToLower) {
    String buff = "";
    Map, Object> tmpMap = paraMap;
    try {
        List, Object>> infoIds = new ArrayList, Object>>(tmpMap.entrySet());
        // 对所有传入参数按照字段名的 ASCII 码从小到大排序（字典序）
        Collections.sort(infoIds, new Comparator, Object>>() {

            @Override
            public int compare(Map.Entry, Object> o1, Map.Entry, Object> o2) {
                return (o1.getKey()).toString().compareTo(o2.getKey());
            }
        });
        // 构造URL 键值对的格式
        StringBuilder buf = new StringBuilder();
        for (Map.Entry, Object> item : infoIds) {
            if (StringUtils.isNotBlank(item.getKey())) {
                String key = item.getKey();
                Object val = item.getValue();
                if (urlEncode) {
                    val = URLEncoder.encode(val.toString(), "utf-8");
                }
                if (keyToLower) {
                    buf.append(key.toLowerCase() + "=" + val);
                } else {
                    buf.append(key + "=" + val);
                }
                buf.append("&");
            }

        }
        buff = buf.toString();
        if (buff.isEmpty() == false) {
            buff = buff.substring(0, buff.length() - 1);
        }
    } catch (Exception e) {
        return null;
    }
    return buff;
}

进行post传输代码如下：

/**
 * 发送POST请求
 *
 * @param url        目的地址
 * @param parameters 请求参数，Map类型。
 * @return 远程响应结果
 */
public static String sendPost(String url, Map, String> parameters) {
    String result = "";// 返回的结果
    BufferedReader in = null;// 读取响应输入流
    PrintWriter out = null;
    StringBuffer sb = new StringBuffer();// 处理请求参数
    String params = "";// 编码之后的参数
    try {
        // 编码请求参数
        if (parameters.size() == 1) {
            for (String name : parameters.keySet()) {
                sb.append(name).append("=").append(
                        java.net.URLEncoder.encode(parameters.get(name),
                                "UTF-8"));
            }
            params = sb.toString();
        } else {
            for (String name : parameters.keySet()) {
                sb.append(name).append("=").append(
                        java.net.URLEncoder.encode(parameters.get(name),
                                "UTF-8")).append("&");
            }
            String temp_params = sb.toString();
            params = temp_params.substring(0, temp_params.length() - 1);
        }
        // 创建URL对象
        System.out.println("sb = " + params);
        java.net.URL connURL = new java.net.URL(url);
        System.out.println("connURL = " + connURL.toString());
        // 打开URL连接
        java.net.HttpURLConnection httpConn = (java.net.HttpURLConnection) connURL
                .openConnection();
        // 设置通用属性
        httpConn.setRequestProperty("Accept", "*/*");
        httpConn.setRequestProperty("Connection", "Keep-Alive");
        httpConn.setRequestProperty("User-Agent",
                "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");
        httpConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        // 设置POST方式
        httpConn.setDoInput(true);
        httpConn.setDoOutput(true);
        // 获取HttpURLConnection对象对应的输出流
        out = new PrintWriter(httpConn.getOutputStream());
        // 发送请求参数
        out.write(params);
        // flush输出流的缓冲
        out.flush();
        // 定义BufferedReader输入流来读取URL的响应，设置编码方式
        in = new BufferedReader(new InputStreamReader(httpConn
                .getInputStream(), "UTF-8"));
        String line;
        // 读取返回的内容
        while ((line = in.readLine()) != null) {
            result += line;
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (out != null) {
                out.close();
            }
            if (in != null) {
                in.close();
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
    return result;
}

至于控制层的代码如下

@RequestMapping("/buy")
public String tobuy(HttpServletRequest request) throws InterruptedException {
    String appid = "4322017072553174";
    Integer goodsid = 802;
    String pcorderid = "1234";
    Integer money = 1;
    String currency = "CHY";
    Map, Object> map = new HashMap<>();
    map.put("appid", appid);
    map.put("goodsid", goodsid);
    map.put("money", money);
    map.put("currency", currency);
    map.put("pcorderid", pcorderid);
    map.put("pcuserid", "123");
    Gson gson = new Gson();
    String s1 = formatUrlMap(map, true, true);
    s1 = s1 + "&key=f68c236d74eb1342383eb871ed1170fa";//key填写的是在H5生成的key H5对应生成的appid goodid都要平台分配的id

   String sign = MD5Util.encode(s1);

    String s = gson.toJson(map);
    Map, String> td = new HashMap<>();
    td.put("transdata", s);
    td.put("sign", sign);
    td.put("signtype", "MD5");
    String post = sendPost("https://payh5.bbnpay.com/cpapi/place_order.php", td);
    System.out.println(URLDecoder.decode(post));
    return "pay";
}