商家二维码 微信支付

1.通过微信平台为商家提供代收款服务

微信⽀付业务—商户注册微信⽀付业务

申请appid和key

2.申请⽀付订单—商户向⽀付平台申请⽀付链接

⽀付订单，并不是⽤户提交的商品订单，⽽是商户向微信⽀付平台申请的⽀付链接

2.1导入依赖

wxpay的maven依赖

<dependency>
 <groupId>com.github.wxpay</groupId>
 <artifactId>wxpay-sdk</artifactId>
 <version>0.0.3</version>
</dependency>

2.2 创建微信⽀付配置类，配置商户信息

创建⼀类，实现WxPayConfig接⼝
重写三分⽅法，分别设置商户AppID\商户ID\商户密钥

package com.qfedu.fmmall.config;
import com.github.wxpay.sdk.WXPayConfig;
import java.io.InputStream;
public class MyPayConfig implements WXPayConfig {
    @Override
    public String getAppID() {
        return "wx632c8f211f8122c6";
    }
    @Override
    public String getMchID() {
        return "1497984412";
    }
    @Override
    public String getKey() {
        return "sbNCm1JnevqI36LrEaxFwcaT0hkGxFnC";
    }
    @Override
    public InputStream getCertStream() {
        return null;
    }
    @Override
    public int getHttpConnectTimeoutMs() {
        return 0;
    }
    @Override
    public int getHttpReadTimeoutMs() {
        return 0;
    }
}

2.3 设置⽀付订单的参数

HashMap<String,String> data = new HashMap<>();
data.put("body","咪咪萧条"); //商品描述
data.put("out_trade_no",orderId); //使⽤当前⽤户订单的编号作为当前⽀付交易的
交易号
data.put("fee_type","CNY"); //⽀付币种
data.put("total_fee","1"); //⽀付⾦额
data.put("trade_type","NATIVE"); //交易类型
data.put("notify_url","/pay/success"); //设置⽀付完成时的回调⽅法
接⼝

2.4 申请⽀付链接

WXPay wxPay = new WXPay(new MyPayConfig());
Map<String, String> resp = wxPay.unifiedOrder(data); //发送请求
orderInfo.put("payUrl",resp.get("code_url"));

全部代码

@PostMapping("/add")
    public ResultVO add(String cids, @RequestBody Orders order){
        ResultVO resultVO = null;
        try {
            Map<String, String> orderInfo = orderService.addOrder(cids, order);
            if(orderInfo!=null){
                String orderId = orderInfo.get("orderId");
                //设置当前订单信息
                HashMap<String,String> data = new HashMap<>();
                data.put("body",orderInfo.get("productNames"));  //商品描述
                data.put("out_trade_no",orderId);               //使用当前用户订单的编号作为当前支付交易的交易号
                data.put("fee_type","CNY");                     //支付币种
                //data.put("total_fee",order.getActualAmount()*100+"");          //支付金额
                data.put("total_fee","1");
                data.put("trade_type","NATIVE");                //交易类型
                data.put("notify_url","http://47.118.45.73:8080/pay/callback");           //设置支付完成时的回调方法接口
                //发送请求，获取响应
                //微信支付：申请支付连接
                WXPay wxPay = new WXPay(new MyPayConfig());
                Map<String, String> resp = wxPay.unifiedOrder(data);
                orderInfo.put("payUrl",resp.get("code_url"));
                //orderInfo中包含：订单编号，购买的商品名称，支付链接
                resultVO = new ResultVO(ResStatus.OK,"提交订单成功！",orderInfo);
            }else{
                resultVO = new ResultVO(ResStatus.NO,"提交订单失败！",null);
            }
        } catch (SQLException e) {
            resultVO = new ResultVO(ResStatus.NO,"提交订单失败！",null);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return resultVO;
    }

2.5支付回调，修改订单状态。

package com.qfedu.fmmall.controller;

import com.github.wxpay.sdk.WXPayUtil;
import com.qfedu.fmmall.service.OrderService;
import com.qfedu.fmmall.websocket.WebSocketServer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.websocket.Session;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping("/pay")
public class PayController {

    @Autowired
    private OrderService orderService;

    /**
     * 回调接口:当用户支付成功之后，微信支付平台就会请求这个接口，将支付状态的数据传递过来
     */
    @RequestMapping("/callback")
    public String paySuccess(HttpServletRequest request) throws Exception {
        System.out.println("--------------------callback");
        // 1.接收微信支付平台传递的数据（使用request的输入流接收）
        ServletInputStream is = request.getInputStream();
        byte[] bs = new byte[1024];
        int len = -1;
        StringBuilder builder = new StringBuilder();
        while((len = is.read(bs))!=-1){
            builder.append(new String(bs,0,len));
        }
        String s = builder.toString();
        //使用帮助类将xml接口的字符串装换成map
        Map<String, String> map = WXPayUtil.xmlToMap(s);

        if(map!=null && "success".equalsIgnoreCase(map.get("result_code"))){
            //支付成功
            //2.修改订单状态为“待发货/已支付”
            String orderId = map.get("out_trade_no");
            int i = orderService.updateOrderStatus(orderId, "2");
            System.out.println("--orderId:"+orderId);
            //3.通过websocket连接，向前端推送消息
            WebSocketServer.sendMsg(orderId,"1");

            //4.响应微信支付平台
            if(i>0){
                HashMap<String,String> resp = new HashMap<>();
                resp.put("return_code","success");
                resp.put("return_msg","OK");
                resp.put("appid",map.get("appid"));
                resp.put("result_code","success");
                return WXPayUtil.mapToXml(resp);
            }
        }
        return null;
    }

}

2.6定时任务，查询订单状态