Java微信扫码支付教你用Java在个人电脑上实现微信扫码支付

时间:2021-06-13 记或往人气:0

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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

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业务流程：

开发指引文档

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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

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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;

@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>
		<!--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>

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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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java后台显示

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加载全部内容

Java微信扫码支付 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：

Java微信扫码支付教你用Java在个人电脑上实现微信扫码支付