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首先构造网页授权url,然后构成超链接让用户点击
WxCpService wxCpService = ...; wxCpService.getOauth2Service().buildAuthorizationUrl(null);
当用户同意授权后,会回调所设置的url并把authorization code传过来,然后用这个code获得user id.
String[] res = wxCpService.getOauth2Service().getUserInfo(code); String userId = res[0]; String deviceId = res[1];