JAVA微信开发：[17]如何获取所有关注用户

该方法获取所有关注公共账号的微信用户的openId集合， 再通过openId集合既可以获取所有的用户的信息。  

/**

* 获取所有的关注用户

*

* @return

*/

public  List<String> getAllWeiXinUser() {

GetExistAccessToken getExistAccessToken = GetExistAccessToken.getInstance();

String accessToken = getExistAccessToken.getExistAccessToken();

List<String> openIds = new ArrayList<String>();

// 上传文件请求路径

String action = "https://api.weixin.qq.com/cgi-bin/user/get?access_token="

+ accessToken;

try {

URL urlGet = new URL(action);

HttpURLConnection http = (HttpURLConnection) urlGet

.openConnection();

http.setRequestMethod("GET"); // 必须是get方式请求

http.setRequestProperty("Content-Type",

"application/x-www-form-urlencoded");

http.setDoOutput(true);

http.setDoInput(true);

System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 连接超时30秒

System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒

http.connect();

InputStream is = http.getInputStream();

int size = is.available();

byte[] jsonBytes = new byte[size];

is.read(jsonBytes);

String result = new String(jsonBytes, "UTF-8");

JSONObject jsonObj = new JSONObject(result);

System.out.println("users" + jsonObj.get("data"));

JSONObject json1 = new JSONObject(jsonObj.get("data").toString());

System.out.println(json1.toString());

JSONArray json2 = new JSONArray(json1.get("openid").toString());

for (int i = 0; i < json2.length(); i++) {

openIds.add(i, json2.getString(i));

}

} catch (Exception e) {

e.printStackTrace();

}

return openIds;

}