微信支付学习笔记之调用com.github.binarywang.wxpay.service接口

接口链接：https://github.com/binarywang

使用步骤：

1. 将HttpServletRequest转成 ip

           /**
   	 * 获得请求地址ip
   	 * @param httpservletrequest
   	 * @return
   	 */
   	public static String getClientIP(HttpServletRequest httpservletrequest) {
   	    if (httpservletrequest == null)
   	        return null;
   	    String s = httpservletrequest.getHeader("X-Forwarded-For");
   	    if (s == null || s.length() == 0 || "unknown".equalsIgnoreCase(s))
   	        s = httpservletrequest.getHeader("Proxy-Client-IP");
   	    if (s == null || s.length() == 0 || "unknown".equalsIgnoreCase(s))
   	        s = httpservletrequest.getHeader("WL-Proxy-Client-IP");
   	    if (s == null || s.length() == 0 || "unknown".equalsIgnoreCase(s))
   	        s = httpservletrequest.getHeader("HTTP_CLIENT_IP");
   	    if (s == null || s.length() == 0 || "unknown".equalsIgnoreCase(s))
   	        s = httpservletrequest.getHeader("HTTP_X_FORWARDED_FOR");
   	    if (s == null || s.length() == 0 || "unknown".equalsIgnoreCase(s))
   	        s = httpservletrequest.getRemoteAddr();
   	    return s;
   	}
   

2. 封装微信统一下单接口，获取"预支付交易会话标识"返回的结果 WxPayUnifiedOrderResult

    
       public WxPayUnifiedOrderRequest toPayInfo(String clientIp) {
           WxPayUnifiedOrderRequest request = new WxPayUnifiedOrderRequest();
           request.setDeviceInfo("WEB");//设备号
           request.setBody(this.getProductName());//商品描述
           request.setOutTradeNo(this.getOrderNo());//商户订单号
           request.setDetail(this.getProductName());//商品详情
           request.setTotalFee(this.getPrice());//总金额|分计
           request.setSpbillCreateIp(clientIp);//终端IP
           request.setNotifyUrl(this.getNotifyUrl());//设置回调路径
           request.setTradeType("JSAPI");//交易类型
           request.setProductId(this.getProductId().toString());//商品id
           request.setOpenid(this.getOpenId());
           return request;
       }
   

    

3. 调用WxPayService接口的createOrder

     /**
      * 调用统一下单接口，并组装生成支付所需参数对象.
      *
      * @param <T>     请使用{@link com.github.binarywang.wxpay.bean.order}包下的类
      * @param request 统一下单请求参数
      * @return 返回 {@link com.github.binarywang.wxpay.bean.order}包下的类对象
      * @throws WxPayException the wx pay exception
      */
     <T> T createOrder(WxPayUnifiedOrderRequest request) throws WxPayException;
   

   //将上面封装的request传进去，调用支付，返回结果
   WxPayMpOrderResult result = payService.createOrder(wxPayUnifiedOrderRequest);
   

    

4. 将返回的结果进行处理返回给前端 
5. 对回调函数进行处理 调用WxPayService 的 parseOrderNotifyResult方法

   WxPayOrderNotifyResult parseOrderNotifyResult(String xmlData) throws WxPayException;