如何修复500个错误请求错误?[ Java,Android ]

我想将Swift代码转换成一个Android应用程序的Java代码。我试图使用“httpsurlconnection”,但它不起作用。

我不确定是应该使用“httpsurlconnection方法”还是应该使用其他方法。

httpsurlconnection失败。

responseCode: 500 (HttpsURLConnection.getResponseCode())
message2: Bad Request (HttpsURLConnection.getResponseMessage())

如何解决500个错误请求错误?

        URL url = new URL("https://***test.herokuapp.com/payment.php");
        HashMap<String, Object> params = new HashMap<>();
        params.put("stripeToken", token);
        params.put("amount", 1500);
        params.put("currency", "jpy");
        params.put("description", "anyone");

        HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
        conn.setRequestMethod("POST");

        int responseCode = conn.getResponseCode(); // responseCode: 500

        if (responseCode == HttpsURLConnection.HTTP_OK) {
            Log.d("Success", String.valueOf(responseCode));
        } else {
            String code = String.valueOf(responseCode);
            String message2 = conn.getResponseMessage(); // message2: Bad Request

        }

在斯威夫特(它工作)

let url = "https://***test.herokuapp.com/payment.php"
    let params: [String : Any] = [
        "stripeToken" : token,
        "amount" : totalAmount,
        "currency" : "jpy",
        "description" : "anyone",

    ]

    let manager = AFHTTPSessionManager().post(url, parameters: params, success: { (operation, responseObject) in
        if let response = responseObject as? [String: String] {
            print(response["status"]! + "________" + response["message"]!)
            ProgressHUD.showSuccess("payment success!!")
        }

    }) { (operation, error) in
        if error != nil {
            print("errorMessage \(error.localizedDescription)")
            ProgressHUD.showError(error.localizedDescription)
            return;
        }
    }