Java微信支付V3 Native支付示例 Apache httpclient版本SDK

微信支付V3 native支付简单示例

apache版本

  导入sdk
<dependency>
    <groupId>com.github.wechatpay-apiv3</groupId>
    <artifactId>wechatpay-apache-httpclient</artifactId>
    <version>0.4.9</version>
</dependency>

1、封装HttpClient请求工具

参数：merchantId(商户号)、merchantSerialNumber(商户证书序列号)、privateKey(商户私钥)、apiV3Key(商户32位key)

private static CloseableHttpClient httpClient;
// 初始化WechatPayHttpClient的方法，需要传入配置信息
public static CloseableHttpClient initHttpClient(String merchantId, String merchantSerialNumber, String privateKey, String apiV3Key)  {
    PrivateKey merchantPrivateKey = PemUtil.loadPrivateKey(privateKey);
​
    AutoUpdateCertificatesVerifier verifier = new AutoUpdateCertificatesVerifier(
            new WechatPay2Credentials(merchantId, new PrivateKeySigner(merchantSerialNumber, merchantPrivateKey)),
            apiV3Key.getBytes(StandardCharsets.UTF_8)
    );
​
    httpClient = WechatPayHttpClientBuilder.create()
            .withMerchant(merchantId, merchantSerialNumber, merchantPrivateKey)
            .withValidator(new WechatPay2Validator(verifier))
            .build();
​
    return httpClient;
}

2、native下单获取到code_url(二维码链接)

2.1调用微信支付接口

HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/v3/pay/transactions/native");

2.2HTTP头参数

Authorization (httpClient会自动完成签名认证)

Accept

Content-Type

//设置请求头
httpPost.setHeader("Accept", "application/json");

2.3HTTP请求体参数

appid（公众号、小程序、网页的appid）

mchid(商户号)

description(商品描述)

out_trade_no(订单号自己定义)

notify_url(回调地址：需要外网可以访问的)

amount：total(integer)、currency(string)

   // 请求body参数
        String reqdata = "{"
                + ""time_expire":"2018-06-08T10:34:56+08:00","
                + ""amount": {"
                + ""total":100,"
                + ""currency":"CNY""
                + "},"
                + ""mchid":"1230000109","
                + ""description":"Image形象店-深圳腾大-QQ公仔","
                + ""notify_url":"https://www.weixin.qq.com/wxpay/pay.php","
                + ""out_trade_no":"1217752501201407033233368018","
                + ""goods_tag":"WXG","
                + ""appid":"wxd678efh567hg6787","
                + "}";
        StringEntity entity = new StringEntity(reqdata,"utf-8");
        entity.setContentType("application/json");
        httpPost.setEntity(entity);
        //设置请求头
        httpPost.setHeader("Accept", "application/json");
​
       //完成签名并执行请求
        CloseableHttpResponse response = httpClient.execute(httpPost);
       //微信返回的数据   
        EntityUtils.toString(response.getEntity())

返回示例

{
2  "code_url" : "weixin://wxpay/bizpayurl/up?pr=NwY5Mz9&groupid=00"
3}

将链接转成二维码即可调起微信支付

微信商户后台需要绑定公众号，开发配置中设置授权native域名