Yelp Fusion POST請求

我試圖讓我的訪問令牌使用Yelp Fusion API。我試着在下面做出下面的POST請求，但不斷收到404錯誤。這是我第一次嘗試發佈POST請求，所以我不確定我是否做得對。Yelp Fusion POST請求

我已經安裝有不同於YELP這裏的說明：提前https://www.yelp.com/developers/documentation/v3/authentication

感謝。

public static final String YELPURL = "https://api.yelp.com/oauth/token"; 
public static void main(String[] args) { 
    try { 
     URL obj = new URL(YELPURL); 
     HttpsURLConnection con = (HttpsURLConnection) obj.openConnection(); 
     con.setRequestMethod("POST"); 
     con.setRequestProperty("grant_type", "client_credentials"); 
     con.setRequestProperty("client_id", CLIENTID); 
     con.setRequestProperty("client_secret", CLIENTSECRET); 
     con.setDoOutput(true); 
     int responseCode = con.getResponseCode(); 
     System.out.println("Response Code: " + responseCode); 
    } catch (Exception e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 

}

來源

2017-06-18 Chris