1.页面代码
//调用扫一扫功能
function callScaning() {
wx.config({
debug: false,
appId: '${wxJson.appId}',
timestamp: '${wxJson.timestamp}',
nonceStr: '${wxJson.nonceStr}',
signature: '${wxJson.signature}',
jsApiList: [ 'scanQRCode' ]
});
wx.error(function(res) {
alert("出错了：" + res.errMsg);//这个地方就是wx.config配置错误，会弹出窗口哪里错误，然后根据微信文档查询即可。
});
wx.scanQRCode({
needResult: 1, // 默认为0，扫描结果由微信处理，1则直接返回扫描结果，
scanType: ["qrCode","barCode"], // 可以指定扫二维码还是一维码，默认二者都有
success: function (res) {
var result = res.resultStr; // 当needResult 为 1 时，扫码返回的结果
alert("扫一扫结果：" + result);
}
});
}
2.后台代码
//获取参数
public String getParameter() {
StringBuffer url = new StringBuffer();
url="页面签名";
JSONObjectwxJson = TicketUtil.sign(wxJson, TicketUtil.getJsApiTicket(), url.toString());
return SUCCESS;
}
public class TicketUtil {
public static JSONObject sign(JSONObject json, String jsapi_ticket, String url) {
String nonce_str = create_nonce_str();
String timestamp = create_timestamp();
String signature = "";
// 注意这里参数名必须全部小写，且必须有序
String string1 = "jsapi_ticket=" + jsapi_ticket + "&noncestr="
+ nonce_str + "×tamp=" + timestamp + "&url=" + url;
try {
MessageDigest crypt = MessageDigest.getInstance("SHA-1");
crypt.reset();
crypt.update(string1.getBytes("UTF-8"));
signature = byteToHex(crypt.digest());
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
WXConfigReader configReader = WXConfigReader.getInstance();
String appId = configReader.getConfigValue("weixin.appid");
json.put("appId", appId);
json.put("url", url);
json.put("jsapi_ticket", jsapi_ticket);
json.put("nonceStr", nonce_str);
json.put("timestamp", timestamp);
json.put("signature", signature);
json.put("signUrl", url);
return json;
}
public static String byteToHex(final byte[] hash) {
Formatter formatter = new Formatter();
for (byte b : hash) {
formatter.format("%02x", b);
}
String result = formatter.toString();
formatter.close();
return result;
}
public static String create_nonce_str() {
return UUID.randomUUID().toString();
}
public static String create_timestamp() {
return Long.toString(System.currentTimeMillis() / 1000);
}
public static String getJsApiTicket() {
String jsApiTicket = null;
WXConfigReader configReader = WXConfigReader.getInstance();
String appid = configReader.getConfigValue("weixin.appid");
String secret = configReader.getConfigValue("weixin.secret");
String tokenUrl = configReader.getConfigValue("weixin.access_tokenUrl") + "?grant_type=client_credential&appid=" + appid + "&secret=" + secret;
String jsapi_ticketUrl = configReader.getConfigValue("weixin.jsapi_ticketUrl");
RestAPIClient client = RestAPIClient.getInstance();
JSONObject accessTokenResult = client.call(tokenUrl);
if (accessTokenResult != null && StringUtils.isNotEmpty(accessTokenResult
.getString("access_token"))) {
String accessToken = accessTokenResult.getString("access_token");
String apiTicketUrl = jsapi_ticketUrl + "&access_token=" + accessToken;
JSONObject apiTicketResult = client.call(apiTicketUrl);
if (apiTicketResult != null
&& "ok".equalsIgnoreCase(apiTicketResult.get("errmsg") + "")) {
jsApiTicket = apiTicketResult.get("ticket") + "";
}
}
return jsApiTicket;
}
public static String accessToken() {
String accessToken = null;
WXConfigReader configReader = WXConfigReader.getInstance();
String appid = configReader.getConfigValue("weixin.appid");
String secret = configReader.getConfigValue("weixin.secret");
String tokenUrl = configReader.getConfigValue("weixin.access_tokenUrl") + "?grant_type=client_credential&appid=" + appid + "&secret=" + secret;
RestAPIClient client = RestAPIClient.getInstance();
JSONObject accessTokenResult = client.call(tokenUrl);
if (accessTokenResult != null && StringUtils.isNotEmpty(accessTokenResult.getString("access_token"))) {
accessToken = accessTokenResult.getString("access_token");
}
return accessToken;
}
}
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