vue使用微信JS-SDK实现分享功能

public String getTicket() {
String urlToken = "https://api.weixin.qq.com/cgi-bin/token";
String tokenObj = HttpClientUtil.sendGet(urlToken, "grant_type=" + Constants.GRANTTYPE + "&secret=" + Constants.APPSECRET + "&appid=" + Constants.APPID);
JSONObject jsonToken = JSONObject.fromObject(tokenObj);
String access_token = jsonToken.getString("access_token");

String urlTicket = "https://api.weixin.qq.com/cgi-bin/ticket/getticket";
String strTicket = HttpClientUtil.sendGet(urlTicket, "type=jsapi" + "&access_token=" + access_token);
JSONObject jsonTicket = JSONObject.fromObject(strTicket);
return jsonTicket.toString();
}

4）签名算法

签名生成规则如下：参与签名的字段包括noncestr（随机字符串）, 有效的jsapi_ticket, timestamp（时间戳）, url（当前网页的URL，不包含#及其后面部分） 。对所有待签名参数按照字段名的ASCII 码从小到大排序（字典序）后，使用URL键值对的格式（即

key1=value1&key2=value2…）

拼接成字符串string1。这里需要注意的是所有参数名均为小写字符。对string1作sha1加密，字段名和字段值都采用原始值，不进行URL 转义。

//主要代码
 @RequestMapping(value = "/get_signature", method = RequestMethod.GET)
public Map<String, String> getSignature(String url) {
  Map<String, String> ret = new HashMap<String, String>();
  String wxTicket = getWxApiTicket();
  String nonce_str = create_nonce_str();
  String timestamp = create_timestamp();
  String str;
  String signature = "";
  //注意这里参数名必须全部小写，且必须有序
  str = "jsapi_ticket=" + wxTicket +
      "&noncestr=" + nonce_str +
      "&timestamp=" + timestamp +
      "&url=" + url;
  logger.info(str);
  try {
    MessageDigest crypt = MessageDigest.getInstance("SHA-1");
    crypt.reset();
    crypt.update(str.getBytes("UTF-8"));
    signature = byteToHex(crypt.digest());
  } catch (NoSuchAlgorithmException e) {
    e.printStackTrace();
  } catch (UnsupportedEncodingException e) {
    e.printStackTrace();
  }
  ret.put("url", url);
  ret.put("jsapi_ticket", wxTicket);
  ret.put("nonceStr", nonce_str);
  ret.put("timestamp", timestamp);
  ret.put("signature", signature);
  ret.put("appId", Constants.APPID);
  return ret;
}

签名接口返回信息

{
  "signature":"4021b3f502e6bd15798a0433af33c4ef1be4ff83",
  "appId":"wx618f45e4948c3889",
  "jsapi_ticket":"sM4AOVdWfPE4DxkXGEs8VOxnOWlkG3Q1qP1pwA8mBLNgkCewNOfFiU8EmlnAx8_Fe0Zh-rGS03Nu8BQZB0a4-g",
  "url":null,
  "nonceStr":"ab5d0e96-429b-4a86-bd88-dc1276dcf76f",								 
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