教你用Java在个人电脑上实现微信扫码支付

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

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：

org.springframework.cloud

spring-cloud-starter-netflix-eureka-client

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-thymeleaf

org.apache.httpcomponents

httpclient

4.5.3

com.google.zxing

core

3.3.3

com.google.zxing

javase

3.3.3

org.springframework.boot

spring-boot-starter-websocket

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(fFrOlkFSession 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 makeOrder(String goodsId, Long price) throws Exception {

//创建支付对象

MyWXConfig config = new MyWXConfig();

WXPay wxPay = new WXPay(config);

Map 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 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 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 =

""+

""+config.getAppID()+""+

""+config.getMchID()+""+

""+UUID.randomUUID().toString().replace("-","")+""+

http://""+tradeNo+""+

"5E00F9F72173C9449F802411E36208734B8138870ED3F66D8E2821D55B317078"+

"";

WXPay pay = new WXPay(config);

Map map = WXPayUtil.xmlToMap(str);

Map 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 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 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("\n" +

" <![CDATA[SUCCESS]]>\n" +

" <![CDATA[OK]]>\n" +

" <![CDATA["+map.get("appid")+"]]>\n" +

" <![CDATA["+map.get("mch_id")+"]]>\n" +

" <![CDATA["+map.get("nonce_str")+"]]>\n" +

" <![CDATA["+map.get("openid")+"]]>\n" +

" <![CDATA["+map.get("sign")+"]]>\n" +

" <![CDATA[SUCCESS]]>\n" +

" <![CDATA["+map.get("prepay_id")+"]]>\n" +

" <![CDATA[NATIVE]]>\n" +

"");

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：

二维码已过期，刷新页面重新获取二维码。

请使用微信扫一扫

扫描二维码支付

> 其他支付方式

成功页面：

支付方式：微信支付

支付金额：￥1006.00元

查看订单    继续购物

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