获取accesstoken时报错,利用PostMethod访问 时
public static String getAccessToken(String appid, String appsecret) throws Exception{  
        String accessToken = null;  
//        PostMethod get = new PostMethod(access_token_url);
        GetMethod get = new GetMethod(access_token_url);
//        post.setRequestHeader("Referer", access_token_url);
//        post.setRequestHeader(USER_AGENT_H, USER_AGENT);
        
        int status = client.executeMethod(get);
        if (status == HttpStatus.SC_OK) {
            String msg = get.getResponseBodyAsString();
            System.out.println(msg);
            AccessToken at = JSON.parseObject(msg, AccessToken.class);
//            Weixin.msgSendCode = ret.getExpiresIn();
            accessToken = at.getToken();
            System.out.println(accessToken );
}
报错:{"errcode":41004,"errmsg":"appsecret missing"}
                                                                
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