简单使用支付宝沙箱接口模拟支付（网页&移动应用类）

• 导入相关依赖

  <!-- https://mvnrepository.com/artifact/com.alipay.sdk/alipay-sdk-java -->
      <dependency>
        <groupId>com.alipay.sdk</groupId>
        <artifactId>alipay-sdk-java</artifactId>
        <version>4.13.50.ALL</version>
      </dependency>
  

• 下载对应的版本的支付样例进行修改使用（本测试是使用手机网站支付DEMO）

• 在配置类中按要求进行相关配置

  本测试只配置应用ID，商户私钥，支付宝公钥，页面跳转同步通知路径以及支付宝开发环境下的网关

  public class AlipayConfig {
  	
  //↓↓↓↓↓↓↓↓↓↓请在这里配置您的基本信息↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
  
  	// 应用ID,您的APPID，收款账号既是您的APPID对应支付宝账号
  	public static String app_id = "";
  	
  	// 商户私钥，您的PKCS8格式RSA2私钥
      public static String merchant_private_key = "";
      
  	// 支付宝公钥,查看地址：https://openhome.alipay.com/platform/keyManage.htm 对应APPID下的支付宝公钥。
      public static String alipay_public_key = "";
      
  	// 服务器异步通知页面路径  需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
  	public static String notify_url = "http://工程公网访问地址/alipay.trade.page.pay-JAVA-UTF-8/notify_url.jsp";
  
  	// 页面跳转同步通知页面路径 需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
  	public static String return_url = "http://localhost:8080/pay_war/alipay.trade.page.pay-JAVA-UTF-8/return_url.jsp";
  
  	// 签名方式
  	public static String sign_type = "RSA2";
  	
  	// 字符编码格式
  	public static String charset = "utf-8";
  	
  	// 支付宝网关
  	public static String gatewayUrl = "https://openapi.alipaydev.com/gateway.do";
  	
  	// 支付宝网关
  	public static String log_path = "C:\\";
  }
  

• 将下载DEMO中支付页面以及支付后跳转的页面进行相关设置

将两个jsp页面中的java代码放到controller层进行相关配置

@RequestMapping("/pay")
    public void pay(String id, String money, HttpServletResponse response) throws AlipayApiException, IOException {
        //获得初始化的AlipayClient
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);

        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);

        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no = id;
        //付款金额，必填
        String total_amount = money;
        //订单名称，必填
        String subject = id;
        //商品描述，可空
        String body = "";

        alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
                + "\"total_amount\":\""+ total_amount +"\","
                + "\"subject\":\""+ subject +"\","
                + "\"body\":\""+ body +"\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

        //若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
        //alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
        //		+ "\"total_amount\":\""+ total_amount +"\","
        //		+ "\"subject\":\""+ subject +"\","
        //		+ "\"body\":\""+ body +"\","
        //		+ "\"timeout_express\":\"10m\","
        //		+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
        //请求参数可查阅【电脑网站支付的API文档-alipay.trade.page.pay-请求参数】章节

        //请求
        String result = alipayClient.pageExecute(alipayRequest).getBody();

        //输出
        //out.println(result);
        response.setContentType("text/html");
        response.getWriter().println(result);
    }

    @RequestMapping("/paysuccess")
    public String paysuccess(HttpServletRequest request) throws UnsupportedEncodingException, AlipayApiException {
        //获取支付宝GET过来反馈信息
        Map<String,String> params = new HashMap<String,String>();
        Map<String,String[]> requestParams = request.getParameterMap();
        for (Iterator<String> 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
            valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
            params.put(name, valueStr);
        }

        boolean signVerified = AlipaySignature.rsaCheckV1(params, AlipayConfig.alipay_public_key, AlipayConfig.charset, AlipayConfig.sign_type); //调用SDK验证签名

        //——请在这里编写您的程序（以下代码仅作参考）——
        if(signVerified) {
            //商户订单号
            String id = 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");

            //付款金额
            String total_amount = new String(request.getParameter("total_amount").getBytes("ISO-8859-1"),"UTF-8");

            orderService.updateOrderStatue(id);
            return "redirect:/client/paysuccess.jsp";
            //out.println("trade_no:"+trade_no+"<br/>out_trade_no:"+out_trade_no+"<br/>total_amount:"+total_amount);
        }else {
            //out.println("验签失败");
            return "redirect:/client/fail.jsp";
        }
    }
otal_amount);
        }else {
            //out.println("验签失败");
            return "redirect:/client/fail.jsp";
        }
    }