java实现在SSM下使用支付宝扫码支付功能

package com.alipay.config;import java.io.FileWriter;import java.io.IOException;import java.util.ResourceBundle;/* * *类名：AlipayConfig *功能：基础配置类 *详细：设置帐户有关信息及返回路径 *修改日期：2017-04-05 *说明： *以下代码只是为了方便商户测试而提供的样例代码，商户可以根据自己网站的需要，按照技术文档编写,并非一定要使用该代码。 *该代码仅供学习和研究支付宝接口使用，只是提供一个参考。 */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 = "2016080403162340";    // 商户私钥，您的PKCS8格式RSA2私钥    public static String merchant_private_key = "MIIEvAID2tulSSmawG5+F4NZbexpnxi8NKQJPZEeAA==";    // 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 = "MIIBIjt26tLTKar8S1ERDWI25viBcMz7PLMxVVUmHf5tdBWfbMhUs3QIDAQAB";    // 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://localhost:8080/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/Exam/index/gouMai";    // 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 = "E://";  //↑↑↑↑↑↑↑↑↑↑请在这里配置您的基本信息    /**      * 写日志，方便测试（看网站需求，也可以改成把记录存入数据库）     * @param sWord 要写入日志里的文本内容     */    public static void logResult(String sWord ) {      FileWriter writer = null;      try {        writer = new FileWriter(log_path + "alipay_log_" + System.currentTimeMillis()+".txt");        writer.write(sWord);      } catch (Exception e) {        e.printStackTrace();      } finally {         if (writer != null) {          try {            writer.close();          } catch (IOException e) {            e.printStackTrace();          }        }      }    }}

//生成有二维码，可供扫码支付的页面  @RequestMapping(value = "aliPay")  public String aliPay(HttpServletResponse response,ModelMap map,String chapterId,HttpServletRequest request,      String WIDout_trade_no,String WIDtotal_amount,String WIDsubject,String WIDbody) throws IOException, AlipayApiException{//   String a,String urlName,String couName....+"&a="+a+"&urlName="+urlName+"&couName="+couName    //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+"?chapterId="+chapterId);    alipayRequest.setNotifyUrl(AlipayConfig.notify_url);    //付款ID，必填    String out_trade_no = WIDout_trade_no;    //付款金额，必填    String total_amount = WIDtotal_amount;    total_amount=URLDecoder.decode(total_amount,"UTF-8");//转码    //订单名称，必填    String subject = WIDsubject;    subject=URLDecoder.decode(subject,"UTF-8");    //商品描述，可空    String body = WIDbody;    alipayRequest.setBizContent("{/"out_trade_no/":/""+ out_trade_no +"/","         + "/"total_amount/":/""+ total_amount +"/","         + "/"subject/":/""+ subject +"/","         + "/"body/":/""+ body +"/","         + "/"timeout_express/":/"1m/","         + "/"product_code/":/"FAST_INSTANT_TRADE_PAY/"}");    //请求    String result = alipayClient.pageExecute(alipayRequest).getBody();     response.setContentType("text/html; charset=utf-8");       PrintWriter out = response.getWriter();        out.println(result);        return null;  }

//点击购买，将课程存入购买表中  @RequestMapping(value="gouMai")  @ResponseBody  public ModelAndView gouMai(String chapterId,HttpServletRequest req,String a,String urlName,String couName,ModelMap map){    ModelAndView mav = new ModelAndView();    Map<String,String> mapp1 = new HashMap<String,String>();//   SysUserTab login_user = sysuserService.getSysUserById(userId);    HttpSession session = req.getSession();    SysUserTab login_user1 = (SysUserTab) session.getAttribute("login_user");    String userId = login_user1.getUserId();//   session.setAttribute("login_user", login_user);    mapp1.put("userId", userId);    mapp1.put("chapterId", chapterId);    int num = sysBuyService.getBuyCount(mapp1);    if(num==0){      mapp1.put("buyId", UUID.randomUUID().toString().replace("-", ""));      sysBuyService.insertBuy(mapp1);    }    //查询课程内容//   String fanhui = showFH(req,chapterId,urlName,couName,map, a);    mav.setViewName("jsp/pay/paySuccess");    return mav;  }