wx.request({ //获取小程序码 url: "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=" + getApp().globalData.access_token, //获取小程序码 header: { 'content-type': 'application/json' }, data:{ scene: json.content, page:"pages/news/detial", width:430 }, method:"POST", success: function (res) { console.log(res); var json = res.data; console.log("json.length=" + json.length); console.log("content length=" + res.header['Content-Length']); var a =new Uint8Array(json.length) for(var i=0;i<json.length;++i){ a[i]=json.charCodeAt(i); } var b = wx.arrayBufferToBase64(a); console.log(b.substring(0,100)) that.setData({ img: b }) wx.hideNavigationBarLoading(); }}) |
console.log返回的结果：
{data: "����", header: {…}, statusCode: 200, errMsg: "request:ok"}
json.length=91729
content length=96702
/f39/QAQSkZJRgABAQAAAQABAAD9/QBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB
可以看出：
res.data是字符串格式的图片数据，然而转换成base64后图片并不能显示出来，
请问微信的技术人员，该如何显示潘慧的小程序码图片呢？
如果现在显示不出来，能不能说一声，避免大家浪费数据在这里瞎测试，
如果能显示，请给出方法或思路，别让大家在这里瞎折腾好吗？？？？
//小程序二维码生成
private void addxiaoweima(int id) throws KeyManagementException, NoSuchAlgorithmException, NoSuchProviderException, IOException {
JSONObject json = new JSONObject();
Map<String, String> params = new HashMap<String, String>();
params.put("appid", "12121");
params.put("secret", "1212121");
params.put("grant_type", "client_credential");
String res = HttpKit.get("https://api.weixin.qq.com/cgi-bin/token",
params);
json = JSONObject.parseObject(res);
String access_token = json.getString("access_token");
// 柜子列表
//List<Tbl_cabinet> list = findall();
/*if (list != null) {
// 遍历列表
for (int i = 0; i < list.size(); i++) {
id = list.get(i).getIdtbl_cabinet();
*/ params.clear();
params.put("path", "pages/auth/index?cid=" + id);
params.put("width", "430");
String post = JSONObject.toJSONString(params);
res = HttpKit.postAndSaveImg(
"https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token="
+ access_token, post, "/eop/upload/", id + ".png");
/*
}
}*/
}
public static String postAndSaveImg(String url, String params,String path,String imgName) throws IOException, NoSuchAlgorithmException, NoSuchProviderException, KeyManagementException {
TrustManager[] tm = { new MyX509TrustManager() };
SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
sslContext.init(null, tm, new java.security.SecureRandom());
// 从上述SSLContext对象中得到SSLSocketFactory对象
SSLSocketFactory ssf = sslContext.getSocketFactory();
URL urlGet = new URL(url);
HttpsURLConnection http = (HttpsURLConnection) urlGet.openConnection();
// 连接超时
http.setConnectTimeout(25000);
// 读取超时 --服务器响应比较慢，增大时间
http.setReadTimeout(25000);
http.setRequestMethod("POST");
http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
http.setSSLSocketFactory(ssf);
http.setDoOutput(true);
http.setDoInput(true);
http.connect();
OutputStream out = http.getOutputStream();
out.write(params.getBytes("UTF-8"));
out.flush();
out.close();
InputStream in = http.getInputStream();
Integer status = saveToImgByInputStream(in, path, imgName);
in.close();
if (http != null) {
// 关闭连接
http.disconnect();
}
return status.toString();
}
publicclassMyX509TrustManagerimplementsX509TrustManager {/** The default X509TrustManager returned by SunX509. We'll delegate* decisions to it, and fall back to the logic in this class if the* default X509TrustManager doesn't trust it.*/X509TrustManager sunJSSEX509TrustManager;MyX509TrustManager()throwsException {// create a "default" JSSE X509TrustManager.KeyStore ks = KeyStore.getInstance("JKS");ks.load(newFileInputStream("trustedCerts"),"passphrase".toCharArray());TrustManagerFactory tmf =TrustManagerFactory.getInstance("SunX509","SunJSSE");tmf.init(ks);这里这个文件"trustedCerts"如何获得？
或者我如何生成？谢谢啦哈~~~
发现其实不需要这么费劲，还是wx的文档没有说的清楚，摸索的过程最痛苦，但收获也最大
谢谢你，朋友~~~
楼主你好, 我是在java后台获取小程序二维码的, 也是base64编码, 跟你一样也是显示不出来.请问你是怎么解决的
微信不提倡在小程序端获取小程序码，应该在服务器端获取小程序码后在小程序端进行显示~
谢谢阳光H
你是说在服务器端编程吗？
先不说安全性问题，就是我上面代码的思路，是哪里错了，造成图片显示不出来呢？
你的回复我再慢慢消化一下，再次表示感谢？