springboot獲取微信JSDK簽名信息的實現示例

更新時間：2023年11月27日 14:43:30 作者：sccd2009

本文介紹了如何在Spring Boot應用中獲取微信JSDK的簽名信息,包括獲取接口URL、參數設置、簽名算法和獲取簽名結果的步驟,具有一定的參考價值,感興趣的可以了解一下

目標

現實項目的需要，需要獲取微信jssdk簽名信息

步驟

1. 初始化配置信息

public Map initJSSDKConfigInfo(String shareUrl) throws Exception {
        //String accessToken = this.getAccessToken();
        String jsapiTicket = this.getJsApiTicket();
        String timestamp = Long.toString(System.currentTimeMillis() / 1000);
        String nonceStr = UUID.randomUUID().toString();
        String signature = this.buildJSSDKSignature(jsapiTicket,timestamp,nonceStr,shareUrl);

        Map&lt;String,String&gt; map = new HashMap&lt;String,String&gt;();
        map.put("shareUrl", shareUrl);
        map.put("jsapi_ticket", jsapiTicket);
        map.put("nonceStr", nonceStr);
        map.put("timestamp", timestamp);
        map.put("signature", signature);
        map.put("appid", WeChatConfig.appId);
        return map;
    }

2. ticket信息獲取

private String getJsApiTicket() {
        String jsApiTicket =redisCache.getCacheObject(JS_API_TICKET);
        if (!StrUtil.isNotEmpty(jsApiTicket)){
            //獲取全局的access_token，唯一票據
            String accessToken = redisCache.getCacheObject(ACCESS_TOKEN_KEY);
            //log.info("getJsApiTicket"+accessToken);
            if (StringUtils.isNotBlank(accessToken)) {
                //獲取jsapi_ticket
                String url = WeChatConfig.getTicketUrl+"access_token="+accessToken+"&amp;type=jsapi";
                HttpHeaders headers = new HttpHeaders();
                headers.setContentType(MediaType.APPLICATION_JSON);
                //請求
                RestTemplate restTemplate = new RestTemplate();
                HttpEntity&lt;String&gt; request = new HttpEntity&lt;&gt;(headers);
                ResponseEntity&lt;String&gt; responseString = restTemplate.postForEntity(url, request, String.class);
                JSONObject json = JSONObject.parseObject(responseString.getBody());
                jsApiTicket = json.getString("ticket");
                redisCache.setCacheObject(JS_API_TICKET, jsApiTicket, 115, TimeUnit.MINUTES);
            }else {
                //access為空打印
                log.info("accessToken","重新獲取");
                this.creatAccessToken();
                accessToken = redisCache.getCacheObject(ACCESS_TOKEN_KEY);
                String url = WeChatConfig.getTicketUrl+"access_token="+accessToken+"&amp;type=jsapi";
                HttpHeaders headers = new HttpHeaders();
                headers.setContentType(MediaType.APPLICATION_JSON);
                //請求
                RestTemplate restTemplate = new RestTemplate();
                HttpEntity&lt;String&gt; request = new HttpEntity&lt;&gt;(headers);
                ResponseEntity&lt;String&gt; responseString = restTemplate.postForEntity(url, request, String.class);
                JSONObject json = JSONObject.parseObject(responseString.getBody());
                jsApiTicket = json.getString("ticket");
                redisCache.setCacheObject(JS_API_TICKET, jsApiTicket, 115, TimeUnit.MINUTES);

            }
        }
        log.info("getJsApiTicket jsApiTicket: {}", jsApiTicket);
        return jsApiTicket.trim();
    }

3. 信息處理封裝

public static String buildJSSDKSignature(String ticket,String timestamp,String nonceStr ,String url) throws Exception {

        String orderedString = "jsapi_ticket=" + ticket
                + "&amp;noncestr=" + nonceStr + "&amp;timestamp=" + timestamp
                + "&amp;url=" + url;
        return sha1(orderedString);
    }
    public static String sha1(String orderedString) throws Exception {
        String ciphertext = null;
        MessageDigest md = MessageDigest.getInstance("SHA-1");
        byte[] digest = md.digest(orderedString.getBytes());
        ciphertext = byteToStr(digest);
        return ciphertext.toLowerCase();
    }
    private static String byteToStr(byte[] byteArray) {
        String strDigest = "";
        for (int i = 0; i &lt; byteArray.length; i++) {
            strDigest += byteToHexStr(byteArray[i]);
        }
        return strDigest;
    }
    private static String byteToHexStr(byte mByte) {
        char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
        char[] tempArr = new char[2];
        tempArr[0] = Digit[(mByte &gt;&gt;&gt; 4) &amp; 0X0F];
        tempArr[1] = Digit[mByte &amp; 0X0F];

        String s = new String(tempArr);
        return s;
    }

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