Java实现PC微信扫码支付
做一个电商网站支付功能必不可少，那我们今天就来盘一盘微信支付。
微信支付官方网站
业务流程：
开发指引文档
支付服务开发前提准备：
1.SDK下载：SDK
2.利用外网穿透，获得一个外网域名：natapp
3.APPID，商户ID，密钥注：上面三个参数需要自己申请
开发阶段：
导入依赖：
<!--eureka的客户端依赖--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <!-- http客户端 --> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.3</version> </dependency> <!-- 二维码 --> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.3.3</version> </dependency> <!-- 生成二维码 --> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.3.3</version> </dependency> <!--websocket 服务器主动发送请求给websocket--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-websocket</artifactId> </dependency>
微信支付配置类
/** * 微信支付配置 */public class MyWXConfig extends WXPayConfig { //账户的APPID @Override public String getAppID() { return "wx307113892f15a42e"; } //商户ID @Override public String getMchID() { return "1508236581"; } //秘钥 @Override public String getKey() { return "HJd7sHGHd6djgdgFG5778GFfhghghgfg"; } @Override public InputStream getCertStream() { return null; } @Override public IWXPayDomain getWXPayDomain() { return new WXPayDomain(); } class WXPayDomain implements IWXPayDomain{ @Override public void report(String domain, long elapsedTimeMillis, Exception ex) { } @Override public DomainInfo getDomain(WXPayConfig config) { return new DomainInfo("api.mch.weixin.qq.com",true); } }}
websocket配置类：
package com.cloud.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.web.socket.server.standard.ServerEndpointExporter;@Configurationpublic class WebSocketConfig { @Bean public ServerEndpointExporter serverEndpointExporter(){ return new ServerEndpointExporter(); }}
wensocket工具类：
package com.cloud.config;import org.springframework.stereotype.Component;import javax.websocket.OnClose;import javax.websocket.OnMessage;import javax.websocket.OnOpen;import javax.websocket.Session;import javax.websocket.server.ServerEndpoint;import java.io.IOException;/** * WebSocket工具类 * ServerEndpoint配置websocket的名称，和前台页面对应 */@ServerEndpoint(value = "/eshop")@Componentpublic class WebSocketUtils { //WebSocket的对话对象 private static Session session = null; //建立和前台页面连接后的回调方法 @OnOpen public void onOpen(Session session){ System.out.println("建立连接"+session); //给连接赋值 WebSocketUtils.session = session; } @OnMessage public void onMessage(String message, Session session){ System.out.println("收到前台消息：" + message); } @OnClose public void onClose(Session session) throws IOException { System.out.println("连接关闭"); session.close(); } /** * 向前台发消息 * @param message * @throws IOException */ public static void sendMessage(String message) throws IOException { System.out.println("发送消息：" + message); if( WebSocketUtils.session != null) { WebSocketUtils.session.getBasicRemote().sendText(message); } }}
service：
package com.cloud.service;import com.cloud.utils.MyWXConfig;import com.cloud.utils.WXPay;import com.cloud.utils.WXPayUtil;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;import org.springframework.stereotype.Service;import javax.servlet.http.HttpServletResponse;import java.util.HashMap;import java.util.Map;import java.util.UUID;/** * 微信支付Service */@Servicepublic class PayService { /** * 下单 * @param goodsId 商品id * @param price 价格 * @return 二维码的URL */ public Map<String, String> makeOrder(String goodsId, Long price) throws Exception { //创建支付对象 MyWXConfig config = new MyWXConfig(); WXPay wxPay = new WXPay(config); Map<String,String> map = new HashMap<>(); map.put("appid",config.getAppID()); map.put("mch_id",config.getMchID()); map.put("device_info","WEB"); map.put("nonce_str", UUID.randomUUID().toString().replace("-","")); map.put("body","商城购物"); String tradeNo = UUID.randomUUID().toString().replace("-", ""); map.put("out_trade_no", tradeNo); map.put("fee_type","CNY"); map.put("total_fee",String.valueOf(price)); map.put("notify_url","http://68dhbz.natappfree.cc/pay/rollback"); //微信对商户后台的回调接口 map.put("trade_type","NATIVE"); map.put("product_id",goodsId); //执行统一下单 Map<String, String> result = wxPay.unifiedOrder(map); System.out.println("result:"+result); //保存订单号 result.put("trade_no",tradeNo); return result; } /** * 生成二维码 * @param url * @param response */ public void makeQRCode(String url, HttpServletResponse response){ //通过支付链接生成二维码 HashMap<EncodeHintType, Object> hints = new HashMap<>(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M); hints.put(EncodeHintType.MARGIN, 2); try { BitMatrix bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, 200, 200, hints); MatrixToImageWriter.writeToStream(bitMatrix, "PNG", response.getOutputStream()); System.out.println("创建二维码完成"); } catch (Exception e) { e.printStackTrace(); } } /** * 检查订单状态 * @param tradeNo * @return * @throws Exception */ public String checkOrder(String tradeNo) throws Exception { MyWXConfig config = new MyWXConfig(); String str = "<xml>"+ "<appid>"+config.getAppID()+"</appid>"+ "<mch_id>"+config.getMchID()+"</mch_id>"+ "<nonce_str>"+UUID.randomUUID().toString().replace("-","")+"</nonce_str>"+ "<out_trade_no>"+tradeNo+"</out_trade_no>"+ "<sign>5E00F9F72173C9449F802411E36208734B8138870ED3F66D8E2821D55B317078</sign>"+ "</xml>"; WXPay pay = new WXPay(config); Map<String,String> map = WXPayUtil.xmlToMap(str); Map<String, String> map2 = pay.orderQuery(map); String state = map2.get("trade_state"); System.out.println("订单"+tradeNo+",状态"+state); return state; }}
controller：
package com.cloud.controller;import com.cloud.config.WebSocketUtils;import com.cloud.service.PayService;import com.cloud.utils.WXPayUtil;import org.apache.tomcat.util.http.fileupload.util.Streams;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.util.StringUtils;import org.springframework.web.bind.annotation.*;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.util.Map;/** * @author yanglihu */@RestController@RequestMapping("/pay")public class PayController { @Autowired private PayService payService; private String tradeNo; /** * 二维码生成 */ @GetMapping("/code") public void qrcode(@RequestParam("goodsId")String goodsId, @RequestParam("price")Long price, HttpServletResponse response){ try { Map<String,String> map = payService.makeOrder(goodsId, price); payService.makeQRCode(map.get("code_url"),response); System.out.println("生成订单号：" + map.get("trade_no")); tradeNo = map.get("trade_no"); } catch (Exception e) { e.printStackTrace(); } } /** * 支付后通知 */ @PostMapping("/rollback") public void notify(HttpServletRequest request, HttpServletResponse response) throws Exception { //获得微信传来的xml字符串 String str = Streams.asString(request.getInputStream()); //将字符串xml转换为Map Map<String, String> map = WXPayUtil.xmlToMap(str); //读取订单号 String no = map.get("out_trade_no"); //模拟修改商户后台数据库订单状态 System.out.println("更新订单状态:"+no); //给微信发送消息 response.getWriter().println("<xml>\n" + " <return_code><![CDATA[SUCCESS]]></return_code>\n" + " <return_msg><![CDATA[OK]]></return_msg>\n" + " <appid><![CDATA["+map.get("appid")+"]]></appid>\n" + " <mch_id><![CDATA["+map.get("mch_id")+"]]></mch_id>\n" + " <nonce_str><![CDATA["+map.get("nonce_str")+"]]></nonce_str>\n" + " <openid><![CDATA["+map.get("openid")+"]]></openid>\n" + " <sign><![CDATA["+map.get("sign")+"]]></sign>\n" + " <result_code><![CDATA[SUCCESS]]></result_code>\n" + " <prepay_id><![CDATA["+map.get("prepay_id")+"]]></prepay_id>\n" + " <trade_type><![CDATA[NATIVE]]></trade_type>\n" + "</xml>"); WebSocketUtils.sendMessage("ok"); } /** * 检查订单状态 */ @PostMapping("checkOrder") public String checkOrder() throws Exception { System.out.println("trade_no:" + tradeNo); if(StringUtils.isEmpty(tradeNo)){ return null; } String success = payService.checkOrder(tradeNo); System.out.println("check:" + success); return success; }}
支付页面：
<!DOCTYPE html><html><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=9; IE=8; IE=7; IE=EDGE"><meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /><title>乐优商城--微信支付页</title> <link rel="icon" href="/assets/img/favicon.ico" rel="external nofollow" rel="external nofollow" > <link rel="stylesheet" type="text/css" href="css/webbase.css" rel="external nofollow" rel="external nofollow" /> <link rel="stylesheet" type="text/css" href="css/pages-weixinpay.css" rel="external nofollow" /></head><body><!--页面顶部白条条，由js动态加载--><script type="text/javascript" src="plugins/jquery/jquery.min.js"></script><div class="top"></div> <script type="text/javascript">$(".top").load("shortcut.html");</script><div class="checkout py-container pay"><div class="checkout-steps"><div class="fl weixin">微信支付</div> <div class="fl sao"> <p class="red">二维码已过期，刷新页面重新获取二维码。</p> <div class="fl code"> <img src="http://api.eshop.com/pay/code?goodsId=11&price=1" alt=""> <div class="saosao"> <p>请使用微信扫一扫</p> <p>扫描二维码支付</p> </div> </div> <div class="fl phone"> </div> </div> <div class="clearfix"></div> <p><a href="pay.html" rel="external nofollow" target="_blank">> 其他支付方式</a></p></div></div></div><script type="text/javascript" src="js/plugins/jquery/jquery.min.js"></script><script type="text/javascript" src="js/plugins/jquery.easing/jquery.easing.min.js"></script><script type="text/javascript" src="js/plugins/sui/sui.min.js"></script><script type="text/javascript" src="js/widget/nav.js"></script><script type="text/javascript">$(function(){$("ul.payType li").click(function(){$(this).css("border","2px solid #E4393C").siblings().css("border-color","#ddd");})})</script><script>var websocket = null;//判断当前浏览器是否支持WebSocketif('WebSocket' in window){websocket = new WebSocket("ws://localhost:8888/eshop");}else{alert('Not support websocket')}//接收到消息的回调方法websocket.onmessage = function(event){console.log(event.data);if(event.data == "ok"){location.href = "paysuccess.html";}}</script></body></html>
成功页面：
<!DOCTYPE html><html><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=9; IE=8; IE=7; IE=EDGE"><meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /><title>乐优商城--支付页-成功</title><link rel="icon" href="/assets/img/favicon.ico" rel="external nofollow" rel="external nofollow" > <link rel="stylesheet" type="text/css" href="css/webbase.css" rel="external nofollow" rel="external nofollow" /> <link rel="stylesheet" type="text/css" href="css/pages-paysuccess.css" rel="external nofollow" /></head><body><!--head--><!--页面顶部白条条，由js动态加载--><script type="text/javascript" src="plugins/jquery/jquery.min.js"></script><div class="top"></div> <script type="text/javascript">$(".top").load("shortcut.html");</script><div class="cart py-container"><!--主内容--><div class="paysuccess"><div class="success"><h3><img src="img/_/right.png" width="48" height="48"> 恭喜您，支付成功啦！</h3><div class="paydetail"><p>支付方式：微信支付</p><p>支付金额：￥1006.00元</p><p class="button"><a href="home-index.html" rel="external nofollow" class="sui-btn btn-xlarge btn-danger">查看订单</a> <a href="index.html" rel="external nofollow" class="sui-btn btn-xlarge ">继续购物</a></p> </div></div></div></div><script type="text/javascript" src="js/plugins/jquery/jquery.min.js"></script><script type="text/javascript" src="js/plugins/jquery.easing/jquery.easing.min.js"></script><script type="text/javascript" src="js/plugins/sui/sui.min.js"></script><script type="text/javascript" src="components/ui-modules/nav/nav-portal-top.js"></script></body></html>
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快忘了那些不高兴的事吧!你看就连今天的阳光都如此明媚灿烂，
