1. 配置

AlipayConfig.java

// 请求网关地址
	public static String PRO_URL = "https://openapi.alipay.com/gateway.do";
	// 编码
	public static String CHARSET = "UTF-8";
	// 返回格式
	public static String FORMAT = "json";
	// RSA2
	public static String SIGNTYPE = "RSA2";
	// 风韵乘客 appid
	public static String APP_ID = "2018011901980871";
	// 风韵乘客 私钥 pkcs8格式的
	public static String PRIVATE_KEY = "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";
	//风韵乘客 支付宝公钥
	public static String ALIPAY_PUBLIC_KEY = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwSXdM+DyMANrfS+XRS4fu8g/0SbwCkdBGqtf44WKwYNjbMk/yDjlVW5nteNvjolmyGLMDGdc/1JRH05ohqb10amkG2uUTzYehbW1CpUid0CgptO9D3/3UUrpwP0q4Oruy+wyfL9MUhqxkDHJpqV7QzsXyCCExLTTBLa8nfiFF7O22Bbqelm/SBbQ4Qg/vwwL3v4zIktsSGWIcL1GZ6w3Sp4M/l8lu7FmklRvCmL9KeST7m7zsZBN9BEHprlDv88arWf/ZtJ3gAVlIwyHYuCuSZqMZP62D3xM9U9uJp7fc5BxerC5IS7EipGWXWmAarkfsffK/t460TvGh1sLTCe1wwIDAQAB";

application.yml

alipay:
  passenger:
    pay:
      return_url: http://fy-share.natapp1.cc/#/paysuccess/
      notify_url: http://fy-gateway.natapp4.cc/driver-service/notify
2. 工具类

AlipayUtils.java

@Slf4j
public class AlipayUtils {
    
    @Value("${alipay.passenger.pay.return_url}")
    private String return_url;
    @Value("${alipay.passenger.pay.notify_url}")
    private String notify_url;

    public static AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.PRO_URL, AlipayConfig.APP_ID, AlipayConfig.PRIVATE_KEY, AlipayConfig.FORMAT,
            AlipayConfig.CHARSET, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.SIGNTYPE);
 
    /**
     * 支付宝支付
     */
    public static void ali_pay(Integer orderId, HttpServletResponse httpResponse) throws Exception{

        AlipayTradeWapPayRequest alipayRequest = new AlipayTradeWapPayRequest();//创建API对应的request
        alipayRequest.setReturnUrl(return_url+orderId);//支付成功同步通知页面
        alipayRequest.setNotifyUrl(notify_url);//异步回调
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddmmssSSS");
        String date = sdf.format(new Date());
        alipayRequest.setBizContent("{" +" \"out_trade_no\":\""+date+"\"," +
                " \"total_amount\":\"0.1\"," +
                " \"subject\":\"张学亮测试支付宝支付\"," +
                " \"product_code\":\"QUICK_WAP_PAY\"" +
                " }");//填充业务参数
        String form="";
        try {
            form = alipayClient.pageExecute(alipayRequest).getBody(); //调用SDK生成表单
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
    	httpResponse.setContentType("text/html;charset=" + AlipayConfig.CHARSET);
    	httpResponse.getWriter().write(form);//直接将完整的表单html输出到页面
    	httpResponse.getWriter().flush();
    	httpResponse.getWriter().close();
    }
    
}
3. Controller

前端调用此接口,唤起支付宝客户端App

@RequestMapping("gotoPay")
public void gotoPay(Integer orderId,HttpServletResponse response){
    try {
        AlipayUtils.ali_pay(orderId,response);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

支付宝异步回调接口

@PostMapping("notify")
public String notify(HttpServletRequest request,HttpServletResponse 			    response)throws Exception{
    //获取支付宝POST过来反馈信息
    Map<String,String> params = new HashMap<String,String>();
    Map requestParams = request.getParameterMap();
    for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext();) {
        String name = (String) iter.next();
        String[] values = (String[]) requestParams.get(name);
        String valueStr = "";
        for (int i = 0; i < values.length; i++) {
            valueStr = (i == values.length - 1) ? valueStr + values[i]
                : valueStr + values[i] + ",";
        }
        //乱码解决,这段代码在出现乱码时使用。如果mysign和sign不相等也可以使用这段代码转化
        //valueStr = new String(valueStr.getBytes("ISO-8859-1"), "gbk");
        params.put(name, valueStr);
    }
    //获取支付宝的通知返回参数,可参考技术文档中页面跳转同步通知参数列表(以下仅供参考)//
    //商户订单号

    String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");
    //支付宝交易号

    String trade_no = new String(request.getParameter("trade_no").getBytes("ISO-8859-1"),"UTF-8");

    //交易状态
    String trade_status = new String(request.getParameter("trade_status").getBytes("ISO-8859-1"),"UTF-8");

    //获取支付宝的通知返回参数,可参考技术文档中页面跳转同步通知参数列表(以上仅供参考)//
    //计算得出通知验证结果
    //boolean AlipaySignature.rsaCheckV1(Map<String, String> params, String publicKey, String charset, String sign_type)
    boolean verify_result = AlipaySignature.rsaCheckV1(params, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.CHARSET, "RSA2");

    if(verify_result){//验证成功
        //
        //请在这里加上商户的业务逻辑程序代码

        //——请根据您的业务逻辑来编写程序(以下代码仅作参考)——
        if(trade_status.equals("TRADE_FINISHED")){//签约的不是可退款协议
            //判断该笔订单是否在商户网站中已经做过处理
            //如果没有做过处理,根据订单号(out_trade_no)在商户网站的订单系统中查到该笔订单的详细,并执行商户的业务程序
            //请务必判断请求时的total_fee、seller_id与通知时获取的total_fee、seller_id为一致的
            //如果有做过处理,不执行商户的业务程序

            //注意:
            //如果签约的是可退款协议,退款日期超过可退款期限后(如三个月可退款),支付宝系统发送该交易状态通知
            //如果没有签约可退款协议,那么付款完成后,支付宝系统发送该交易状态通知。
        } else if (trade_status.equals("TRADE_SUCCESS")){//签约的是可退款协议
            //判断该笔订单是否在商户网站中已经做过处理
            //如果没有做过处理,根据订单号(out_trade_no)在商户网站的订单系统中查到该笔订单的详细,并执行商户的业务程序
            //请务必判断请求时的total_fee、seller_id与通知时获取的total_fee、seller_id为一致的
            //如果有做过处理,不执行商户的业务程序
            System.out.println("=====异步通知TRADE_SUCCESS:支付成功=====");
            // response.sendRedirect("http://fy-share.natapp1.cc/#/paysuccess/500079723");

            //注意:
            //如果签约的是可退款协议,那么付款完成后,支付宝系统发送该交易状态通知。
        }

        return "success";
        // out.clear();
        // out.println("success");	//请不要修改或删除
        // System.out.print("异步通知验证成功!!!!!!!!!!!!!!!!!===");
        //
    }else{//验证失败
        // out.println("fail");
        System.out.print("异步通知验证失败!!!!!!!!!!!!!!!!!");
        return "fail";
    }
}