上篇文章我們已經(jīng)結(jié)束了微信支付準(zhǔn)備工作以及JSAPI調(diào)起支付

文章地址：https://blog.csdn.net/ssdadasd15623/article/details/134684556

接下來實(shí)現(xiàn)，付款后的查單操作

查詢訂單分為微信訂單號(hào)查詢以及商戶訂單號(hào)查詢，這里使用商戶訂單號(hào)，也就是自己的系統(tǒng)的訂單號(hào)

查看微信支付文檔-商戶訂單號(hào)查詢訂單

https://pay.weixin.qq.com/docs/merchant/apis/jsapi-payment/query-by-out-trade-no.html

在請(qǐng)求接口時(shí)，注意??：請(qǐng)求參數(shù)內(nèi)的Authorization參數(shù)需要提前生成
https://pay.weixin.qq.com/docs/merchant/development/interface-rules/signature-generation.html
在這里微信支付給出了明確的文檔教我們?nèi)绾螛?gòu)造請(qǐng)求簽名

構(gòu)造請(qǐng)求簽名串

1. 第一步是請(qǐng)求方式，這里查詢訂單是“GET”
2. 第二步是請(qǐng)求的絕對(duì)URL，這里請(qǐng)求地址是“
   https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/{out_trade_no}”，微信給出示例代碼如何獲取絕對(duì)URL，例如訂單號(hào)為202401010001，商戶號(hào)為12345678

HttpUrl httpurl = HttpUrl.parse("https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/202401010001?mchid=12345678"); //使用okhttp3 SDK

3. 第三步是當(dāng)前時(shí)間戳，這里使用currentTimeMillis()方法生成時(shí)間戳

long timestamp = System.currentTimeMillis() / 1000; //生成時(shí)間戳

4. 第四步是請(qǐng)求隨機(jī)字符串，這里微信支付的工具類給出了生成隨機(jī)字符串的方法

String nonceStr = WXPayUtil.generateNonceStr(); //生成隨機(jī)字符串

5. 最后是請(qǐng)求報(bào)文主體，這里是GET方法，沒有請(qǐng)求體，所以就是一個(gè)空的字符串
6. 最終組合在一起的字符串為

GET\n  //請(qǐng)求方式
/v3/pay/transactions/out-trade-no/202401010001?mchid=12345678\n //請(qǐng)求地址絕對(duì)路徑
1554208460\n //時(shí)間戳
593BEC0C930BF1AFEB40B4A08C8FB242\n //隨機(jī)字符串
\n

??每行內(nèi)容后需添加換行符‘\n‘

完整代碼：

Controller.java文件

......

	@Autowired
    private WxPayConfig wxPayConfig; //存放微信基本配置數(shù)據(jù)


	@GetMapping("/get_order_status")
    public Map<String, Object> get_authorization(@RequestParam String order_no) throws IOException, SignatureException, NoSuchAlgorithmException, InvalidKeyException {
        Map<String, Object> map = new HashMap<>();
        String schema = "WECHATPAY2-SHA256-RSA2048 "; //注意這個(gè)，有一個(gè)空格
        HttpUrl httpurl = HttpUrl.parse("https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/" + order_no + "?mchid=" + wxPayConfig.getMchId()); //構(gòu)造參與簽名的URL
        HttpGet httpGet = new HttpGet("https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/" + order_no + "?mchid=" + wxPayConfig.getMchId());

        httpGet.setHeader("Authorization", schema + getToken("GET", httpurl, "")); //微信支付文檔說明，GET請(qǐng)求時(shí)body為空
        httpGet.setHeader("Accept", "application/json;charset=utf-8");

        CloseableHttpClient httpClient = HttpClientBuilder.create().build();
        CloseableHttpResponse response = httpClient.execute(httpGet);
        // 獲取響應(yīng)狀態(tài)碼
        int statusCode = response.getStatusLine().getStatusCode();
        // 獲取響應(yīng)內(nèi)容
        String responseBody = EntityUtils.toString(response.getEntity());
        // 關(guān)閉響應(yīng)對(duì)象
        response.close();
        map.put("code", statusCode);
        map.put("data", responseBody);
        return map;
    }


String getToken(String method, HttpUrl url, String body) throws UnsupportedEncodingException, SignatureException, NoSuchAlgorithmException, InvalidKeyException {
        String nonceStr = WXPayUtil.generateNonceStr(); //WXPayUtil是微信支付自帶的sdk
        long timestamp = System.currentTimeMillis() / 1000; //生成時(shí)間戳
        String message = buildMessage(method, url, timestamp, nonceStr, body); 
        String signature = sign(message.getBytes("utf-8"));

        return "mchid=\"" + wxPayConfig.getMchId() + "\","
                + "nonce_str=\"" + nonceStr + "\","
                + "timestamp=\"" + timestamp + "\","
                + "serial_no=\"" + wxPayConfig.getMchSerialNo() + "\"," //mchserialNo是微信支付中申請(qǐng)的證書序列號(hào)
                + "signature=\"" + signature + "\"";
    }

    String sign(byte[] message) throws InvalidKeyException, SignatureException, NoSuchAlgorithmException {
        Signature sign = Signature.getInstance("SHA256withRSA");
        sign.initSign(wxPayConfig.getPrivateKey());
        sign.update(message);

        return Base64.getEncoder().encodeToString(sign.sign());
    }

    String buildMessage(String method, HttpUrl url, long timestamp, String nonceStr, String body) {
        String canonicalUrl = url.encodedPath();
        if (url.encodedQuery() != null) {
            canonicalUrl += "?" + url.encodedQuery();
        }

        return method + "\n"
                + canonicalUrl + "\n"
                + timestamp + "\n"
                + nonceStr + "\n"
                + body + "\n";
    }
......

使用apifox測試結(jié)果：
文章來源地址http://www.zghlxwxcb.cn/news/detail-777969.html

到了這里，關(guān)于【微信支付】springboot-java接入微信支付-JSAPI支付/查單/退款/發(fā)送紅包（二）---查單的文章就介紹完了。如果您還想了解更多內(nèi)容，請(qǐng)?jiān)谟疑辖撬阉鱐OY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！