springboot微信支付,支付二维码生成

要生成微信支付二维码，可以使用微信支付官方提供的接口，以下是基于 Spring Boot 的简单实现步骤：

1. 引入相关依赖

<dependency>
  <groupId>com.github.wxpay</groupId>
  <artifactId>wxpay-sdk</artifactId>
  <version>3.0.9</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>

2. 配置微信支付相关参数

@Configuration
public class WxPayConfig {
 
    // 微信支付分配的商户号
    @Value("${wxpay.mchId}")
    private String mchId;
 
    // 微信支付分配的终端设备号
    @Value("${wxpay.deviceInfo}")
    private String deviceInfo;
 
    // 微信支付分配的公众账号ID
    @Value("${wxpay.appId}")
    private String appId;
 
    // 微信支付分配的商户密钥
    @Value("${wxpay.key}")
    private String key;
 
    // 微信支付异步通知地址
    @Value("${wxpay.notifyUrl}")
    private String notifyUrl;
 
    // 微信支付统一下单接口地址
    @Value("${wxpay.unifiedOrderUrl}")
    private String unifiedOrderUrl;
 
    // 微信支付查询订单接口地址
    @Value("${wxpay.orderQueryUrl}")
    private String orderQueryUrl;
 
    // 微信支付关闭订单接口地址
    @Value("${wxpay.closeOrderUrl}")
    private String closeOrderUrl;
 
    // 微信支付申请退款接口地址
    @Value("${wxpay.refundUrl}")
    private String refundUrl;
 
    // 微信支付查询退款接口地址
    @Value("${wxpay.refundQueryUrl}")
    private String refundQueryUrl;
 
    // 微信支付下载对账单接口地址
    @Value("${wxpay.downloadBillUrl}")
    private String downloadBillUrl;
 
    // 微信支付交易保障接口地址
    @Value("${wxpay.reportUrl}")
    private String reportUrl;
 
    // 签名类型
    private final String SIGN_TYPE = "MD5";
 
    // 连接超时时间
    private final int CONNECT_TIMEOUT = 5000;
 
    // 读取超时时间
    private final int READ_TIMEOUT = 10000;
 
    // 微信支付API证书路径
    @Value("${wxpay.certPath}")
    private String certPath;
 
    // 微信支付API证书密码
    @Value("${wxpay.certPassword}")
    private String certPassword;
 
    /**
     * 初始化微信支付配置
     */
    @Bean
    public WXPay wxPay() throws Exception {
        WXPayConfigImpl config = new WXPayConfigImpl();
        config.setAppID(appId);
        config.setMchID(mchId);
        config.setKey(key);
        config.setDeviceInfo(deviceInfo);
        config.setSignType(SIGN_TYPE);
        config.setUnifiedOrderUrl(unifiedOrderUrl);
        config.setOrderQueryUrl(orderQueryUrl);
        config.setCloseOrderUrl(closeOrderUrl);
        config.setRefundUrl(refundUrl);
        config.setRefundQueryUrl(refundQueryUrl);
        config.setDownloadBillUrl(downloadBillUrl);
        config.setReportUrl(reportUrl);
        return new WXPay(config, notifyUrl, true, true);
    }
 
    /**
     * 微信支付配置类
     */
    class WXPayConfigImpl extends WXPayConfig {
 
        private String appId;
        private String mchId;
        private String key;
        private String deviceInfo;
        private String signType;
        private String unifiedOrderUrl;
        private String orderQueryUrl;
        private String closeOrderUrl;
        private String refundUrl;
        private String refundQueryUrl;
        private String downloadBillUrl;
        private String reportUrl;
 
        public void setAppID(String appId) {
            this.appId = appId;
        }
 
        public void setMchID(String mchId) {
            this.mchId = mchId;
        }
 
        public void setKey(String key) {
            this.key = key;
        }
 
        public void setDeviceInfo(String deviceInfo) {
            this.deviceInfo = deviceInfo;
        }
 
        public void setSignType(String signType) {
            this.signType = signType;
        }
 
        public void setUnifiedOrderUrl(String unifiedOrderUrl) {
            this.unifiedOrderUrl = unifiedOrderUrl;
        }
 
        public void setOrderQueryUrl(String orderQueryUrl) {
            this.orderQueryUrl = orderQueryUrl;
        }
 
        public void setCloseOrderUrl(String closeOrderUrl) {
            this.closeOrderUrl = closeOrderUrl;
        }
 
        public void setRefundUrl(String refundUrl) {
            this.refundUrl = refundUrl;
        }
 
        public void setRefundQueryUrl(String refundQueryUrl) {
            this.refundQueryUrl = refundQueryUrl;
        }
 
        public void setDownloadBillUrl(String downloadBillUrl) {
            this.downloadBillUrl = downloadBillUrl;
        }
 
        public void setReportUrl(String reportUrl) {
            this.reportUrl = reportUrl;
        }
 
        @Override
        public String getAppID() {
            return appId;
        }
 
        @Override
        public String getMchID() {
            return mchId;
        }
 
        @Override
        public String getKey() {
            return key;
        }
 
        @Override
        public InputStream getCertStream() {
            try {
                return new FileInputStream(new File(certPath));
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
            return null;
        }
 
        @Override
        public int getHttpConnectTimeoutMs() {
            return CONNECT_TIMEOUT;
        }
 
        @Override
        public int getHttpReadTimeoutMs() {
            return READ_TIMEOUT;
        }
 
        @Override
        public String getDeviceInfo() {
            return deviceInfo;
        }
 
        @Override
        public String getSignType() {
            return signType;
        }
 
        @Override
        public String getUnifiedOrderUrl() {
            return unifiedOrderUrl;
        }
 
        @Override
        public String getOrderQueryUrl() {
            return orderQueryUrl;
        }
 
        @Override
        public String getCloseOrderUrl() {
            return closeOrderUrl;
        }
 
        @Override
        public String getRefundUrl() {
            return refundUrl;
        }
 
        @Override
        public String getRefundQueryUrl() {
            return refundQueryUrl;
        }
 
        @Override
        public String getDownloadBillUrl() {
            return downloadBillUrl;
        }
 
        @Override
        public String getReportUrl() {
            return reportUrl;
        }
    }
}

3. 调用微信支付统一下单接口，获取支付二维码

@RestController
@RequestMapping("/wxpay")
public class WxPayController {
 
    @Autowired
    private WXPay wxPay;
 
    /**
     * 生成微信支付二维码
     *
     * @param orderId 订单ID
     * @param amount  支付金额
     * @return 二维码图片Base64编码字符串
     */
    @GetMapping("/qrcode")
    public String generateQrCode(@RequestParam("order_id") String orderId, @RequestParam("amount") int amount) {
        try {
            Map<String, String> data = new HashMap<>();
            data.put("body", "xxxx"); // 商品描述
            data.put("out_trade_no", orderId); // 订单号
            data.put("total_fee", String.valueOf(amount)); // 支付金额，单位为分
            data.put("spbill_create_ip", "127.0.0.1"); // 发起支付的客户端IP
            data.put("notify_url", "http://localhost/wxpay/notify"); // 支付成功的回调地址
            data.put("trade_type", "NATIVE"); // 交易类型，JSAPI：公众号支付；NATIVE：扫码支付；APP：APP支付
            data.put("product_id", orderId); // 商品ID，trade_type=NATIVE时必填
 
            // 调用微信支付统一下单接口
            Map<String, String> result = wxPay.unifiedOrder(data);
            String return_code = result.get("return_code");
            String result_code = result.get("result_code");
            if ("SUCCESS".equals(return_code) && "SUCCESS".equals(result_code)) {
                String codeUrl = result.get("code_url");
                // 生成二维码
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                BitMatrix bitMatrix = new MultiFormatWriter().encode(codeUrl, BarcodeFormat.QR_CODE, 300, 300);
                MatrixToImageWriter.writeToStream(bitMatrix, "png", outputStream);
                byte[] bytes = outputStream.toByteArray();
                return Base64.getEncoder().encodeToString(bytes);
            } else {
                String err_code_des = result.get("err_code_des");
                throw new RuntimeException(err_code_des);
            }
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e.getMessage());
        }
    }
}

以上就是基于 Spring Boot 的微信支付二维码生成的简单实现了。需要注意的是，微信支付二维码的有效期为2小时，超过时间后需要重新生成。