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教你用Java在个人电脑上实现微信扫码支付

作者：记或往　　发布时间：2023-07-22 20:52:15　

标签：Java,微信,扫码支付

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：

<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>

<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.3</version>
</dependency>

<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.3</version>
</dependency>

<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.3</version>
</dependency>

<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;
@Configuration
public 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")
@Component
public 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
*/
@Service
public 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>

<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WebSocket
if('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>


<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">

<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>

java后台显示

来源：https://blog.csdn.net/xiaozhuzhuyang/article/details/117789776

投稿

教你用Java在个人电脑上实现微信扫码支付

Java实现PC微信扫码支付

业务流程：

支付服务开发前提准备：

开发阶段：

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