微信扫一扫支付(java版)

时间 2019-12-05

标签微信一扫支付 java 栏目 Java 繁體版

原文原文链接

对于微信支付,开发人员要作的其实不多,我这里就作了3样:建立二维码,支付成功以后的notify,还有定时查询支付是否成功.java

先说第一步:建立二维码.ajax

<img src="url"  >

url为后台建立二维码程序的路径.spring

我用的是spring MVC,实例也就以此为准,下面是建立二维码的程序:服务器

/** 
	 * 建立二维码(用户帐户充值的二维码) 
	 * @throws UnsupportedEncodingException 
	 */  
	@RequestMapping("/url")  
	public void url(String id) throws RootException, UnsupportedEncodingException {  


		//fee表明须要支付的金钱,1表明1分.下面的100就是1块钱.
		Integer fee =100;
		
		
	    //生成订单 .notifyUrl就是支付成功以后,微信会根据你给的路径,来提醒你,支付成功了,下面具体讲.
	    String orderInfo = WeiXinPayCommUtil.createOrderInfo(
	    		            id,
	    					"提示语",
	    					fee+"",
	    					notifyUrl
	    					,IpUtil.getIpAddr(request)
	    					);  
	   
	    //调统一下单API   将返回预支付交易连接（code_url）生成二维码图片  
	    String code_url = WeiXinPayCommUtil.httpOrder(orderInfo);  
	    
	    try {  
	    	
	        int width = 230;  
	        int height = 230;  
	        String format = "png";  
	        Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();  
	        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");  
	        BitMatrix bitMatrix = new MultiFormatWriter().encode(code_url, BarcodeFormat.QR_CODE, width, height, hints);  
	        ServletOutputStream out = null;  
	        out = response.getOutputStream();  
	        MatrixToImageWriter.writeToStream(bitMatrix, format, out);  
	        out.flush();  
	        out.close();  
	    } catch (Exception e) {  
	    	
	    }  
	  
	}

接着页面上就会显示出你建立的二维码了.微信

第二步:支付成功以后的通知(项目放到服务器上以后才有用.):app

/**
	 * 支付异步接受通知
	 * @throws RootException
	 * @throws IOException 
	 * @throws JDOMException 
	 */
	@RequestMapping("/payNotify")
	public void payNotify() throws RootException, IOException, JDOMException{
		
		logger.info("WeiXinPay notify ...");
		
		//读取参数  
        InputStream inputStream ;  
        StringBuffer sb = new StringBuffer();  
        inputStream = request.getInputStream();  
        String s ;  
        BufferedReader in = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));  
        while ((s = in.readLine()) != null){  
            sb.append(s);  
        }  
        
        in.close();  
        inputStream.close();  
  
        //解析xml成map  
        Map<String, String> m = new HashMap<String, String>();  
        m = WeiXinXMLUtil.doXMLParse(sb.toString());  
          
        //过滤空 设置 TreeMap  
        SortedMap<Object,Object> packageParams = new TreeMap<Object,Object>();        
        Iterator<String> it = m.keySet().iterator();  
        while (it.hasNext()) {  
            String parameter = (String) it.next();  
            String parameterValue = (String) m.get(parameter);  
              
            String v = "";  
            if(null != parameterValue) {  
                v = parameterValue.trim();  
            }  
            packageParams.put(parameter, v);  
        }  
          
        // 帐号信息  
        String key = WeiXinPayConfig.key; // key  
  
        logger.info(packageParams);  
        
        
        //判断签名是否正确  
        if(WeiXinPayCommUtil.isTenpaySign("UTF-8", packageParams,key)) {  
            //------------------------------  
            //处理业务开始  
            //------------------------------  
            String resXml = "";  
            if("SUCCESS".equals((String)packageParams.get("result_code"))){  
                // 这里是支付成功  
                //////////执行本身的业务逻辑////////////////  
                String mch_id = (String)packageParams.get("mch_id");  
                String openid = (String)packageParams.get("openid");  
                String is_subscribe = (String)packageParams.get("is_subscribe");  
                String out_trade_no = (String)packageParams.get("out_trade_no");  
                  
                String total_fee = (String)packageParams.get("total_fee");  
                  
                logger.info("mch_id:"+mch_id);  
                logger.info("openid:"+openid);  
                logger.info("is_subscribe:"+is_subscribe);  
                logger.info("out_trade_no:"+out_trade_no);  
                logger.info("total_fee:"+total_fee);  
                  
                //////////执行本身的业务逻辑////////////////  
                
                BaseVo vo2 = 业务逻辑代码.
				if(vo2.getMsg().equals("true")){
					logger.info("支付成功");  
					//通知微信.异步确认成功.必写.否则会一直通知后台.八次以后就认为交易失败了.  
					resXml = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>"  
							+ "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> ";  
				}else{
					logger.info("支付失败,错误信息：" + packageParams.get("err_code"));  
	                resXml = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>"  
	                        + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
				}
                  
            } else {  
                logger.info("支付失败,错误信息：" + packageParams.get("err_code"));  
                resXml = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>"  
                        + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";  
            }  
            //------------------------------  
            //处理业务完毕  
            //------------------------------  
            BufferedOutputStream out = new BufferedOutputStream(  
                    response.getOutputStream());  
            out.write(resXml.getBytes());  
            out.flush();  
            out.close();  
        } else{  
            logger.info("通知签名验证失败");  
        }  
		
	}

最后一个就是定时检测是否支付成功,能够使用ajax异步

/**
	 * 支付定时检测(用户支付)
	 * @throws RootException
	 * @throws IOException 
	 * @throws JDOMException
	 * @author dingzefeng
	 */
	@RequestMapping("/payCheck")
	@ResponseBody
	public BaseVo payCheck(String id) throws RootException, IOException, JDOMException{
		BaseVo vo = new BaseVo();
		vo.setMsg("error");
		try {
			if(!ValidateUtil.validateBlank(id)){
				//生成查询xml  
				String orderInfo = WeiXinPayCommUtil.selectOrderInfo(id);
				
				String result = WeiXinPayCommUtil.httpSelectOrder(orderInfo);
				if(result != null && result.equals("true")){
					//业务逻辑代码
					
					return vo;
				} 
			}else{
				vo.setMsg("error");
			}
			
		} catch (Exception e) {
			e.printStackTrace();
		}
		return vo;
		
	}

下面地址为微信支付的util包下载地址:http://pan.baidu.com/s/1eSmIoYA微信支付