微信小程序授权示例代码

获取微信唯一表示openid
Properties propertie = new Properties();
InputStream configStream = Wxa.class.getClassLoader().getResourceAsStream(“application.properties”);
propertie.load(configStream);
String appid = propertie.getProperty(“wxaAppid”);
String secret = propertie.getProperty(“wxaSecret”);
String openId = “”;// 用户唯一标识
String openidUrl = “https://api.weixin.qq.com/sns/jscode2session”;
HttpPost httpPost = new HttpPost(openidUrl);
httpPost.addHeader(“Content-Type”, “text/xml”);
List nvalues = new ArrayList<>();
nvalues.add(new BasicNameValuePair(“appid”, appid));
nvalues.add(new BasicNameValuePair(“secret”, secret));
nvalues.add(new BasicNameValuePair(“js_code”, ((String) params.get(“code”)).toString()));
nvalues.add(new BasicNameValuePair(“grant_type”, “authorization_code”));
httpPost.setEntity(new UrlEncodedFormEntity(nvalues));
HttpResponse httpResponse = null;
String str = “”;
StringBuffer stringBuffer = new StringBuffer();
for (int i = 0; i < 3; i++) {
httpResponse = new DefaultHttpClient().execute(httpPost);
if (httpResponse.getStatusLine().getStatusCode() == 200) {// 获取调用api返回数据
InputStream content = httpResponse.getEntity().getContent();
InputStreamReader reader = new InputStreamReader(content);
BufferedReader bufr = new BufferedReader(reader);// 缓冲
while ((str = bufr.readLine()) != null) {
stringBuffer.append(str);
}
break;
}
}
JSONObject jsonObject = JSONObject.parseObject(stringBuffer.toString());
if (jsonObject.containsKey(“openid”)) {
openId = jsonObject.get(“openid”).toString();
}
配置文件中 写入小程序的app_id，app_key