跟蹤異常詳細信息，其中包含錯誤代碼和PayPal中的錯誤描述

Question

這是我迄今爲止完成的代碼。

public void creditcardPayment(){ 
APIContext apiContext = new APIContext(); 
     String accessToken = ""; 

     try { 
      accessToken = new OAuthTokenCredential(CLIENT_ID, CLIENT_SECRET, 
        sdkConfig).getAccessToken(); 
     } catch (PayPalRESTException e) { 
      throw new PayPalRESTException("ACCESS TOKEN ERROR" 
        + e.getLocalizedMessage()); 
     } 

     System.out.println(accessToken); 

     apiContext = new APIContext(accessToken); 
     apiContext.setConfigurationMap(sdkConfig); 

     CreditCard creditCard = new CreditCard(); 
     creditCard.setType("visa"); 
     creditCard.setNumber("4204359776052315"); 
     creditCard.setExpireMonth(3); 
     creditCard.setExpireYear(2019); 
     creditCard.setFirstName("ppashish"); 
     creditCard.setLastName("pal"); 

     CreditCard createdCreditCard = null; 
     FundingInstrument fundingInstrument = new FundingInstrument(); 
     List<FundingInstrument> fundingInstrumentList = new ArrayList<FundingInstrument>(); 

     try { 
      createdCreditCard = creditCard.create(apiContext); 
      String ccId = createdCreditCard.getId(); 
      System.out.println(ccId); 

      CreditCardToken creditCardToken = new CreditCardToken(); 
      creditCardToken.setCreditCardId(ccId); 
      System.out.println(creditCardToken.getType() + " last 4"); 

      fundingInstrument.setCreditCardToken(creditCardToken); 
      fundingInstrumentList.add(fundingInstrument); 

     } catch (PayPalRESTException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      throw new PayPalRESTException("INVALID CARD" 
        + e.getLocalizedMessage()); 

     } 

     Payer payer = new Payer(); 
     payer.setFundingInstruments(fundingInstrumentList); 
     payer.setPaymentMethod("credit_card"); 

     System.out.println(); 

     Amount amount = new Amount(); 
     amount.setCurrency("USD"); 
     amount.setTotal("3"); 

     Transaction transaction = new Transaction(); 
     transaction.setDescription("creating a payment with saved credit card"); 
     transaction.setAmount(amount); 

     List<Transaction> transactions = new ArrayList<Transaction>(); 
     transactions.add(transaction); 

     Payment payment = new Payment(); 
     payment.setIntent("authorize"); 
     payer.setPayerInfo(new PayerInfo().setPayerId("MD44W3Z67ZQZ4")); 
     payment.setPayer(payer); 
     payment.setTransactions(transactions); 
     Payment createdPayment = null; 

     try { 
      createdPayment = payment.create(apiContext); 
     } catch (PayPalRESTException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      throw new PayPalRESTException("TRANSACTION FAILURE..." 
        + e.getLocalizedMessage()); 
     } 

     System.out.println(createdCreditCard.getId()); 
     System.out.println(createdPayment.getId()); 
     System.out.println(createdPayment.getState()); 
     Iterator<Transaction> v = createdPayment.getTransactions().iterator(); 

     while (v.hasNext()) { 
      Transaction ttt = (Transaction) v.next(); 
      Iterator<RelatedResources> v1 = ttt.getRelatedResources() 
        .iterator(); 
      while (v1.hasNext()) { 
       RelatedResources t = (RelatedResources) v1.next(); 
       System.out.println(t.toJSON()); 

      } 
     } 

}

我處理我的例外，在我的catch塊和堆棧跟蹤如下：

SEVERE: Error code : 400 with response : {"name":"VALIDATION_ERROR", 
"details":[{"field":"number","issue":"Value is invalid"}], 
"message":"Invalid request - see details", 
"information_link":"https://developer.paypal.com/docs/api/#VALIDATION_ERROR","debug_id":"4c0b74d635ef0"} 

com.paypal.core.rest.PayPalResource.execute(PayPalResource.java:374) 
    at com.paypal.core.rest.PayPalResource.configureAndExecute(PayPalResource.java:225) 
    at com.paypal.api.payments.CreditCard.create(CreditCard.java:384) 
    at models.PayPalDAO.creditCardPayment(PayPalDAO.java:623) 
    at models.PayPalDAO.main(PayPalDAO.java:788) 
Caused by: com.paypal.exception.HttpErrorException: Error code : 400 with response : {"name":"VALIDATION_ERROR","details":[{"field":"number","issue":"Value is invalid"}],"message":"Invalid request - see details","information_link":"https://developer.paypal.com/docs/api/#VALIDATION_ERROR","debug_id":"4c0b74d635ef0"} 
    at com.paypal.core.HttpConnection.execute(HttpConnection.java:108) 
    at com.paypal.core.rest.PayPalResource.execute(PayPalResource.java:367) 
    ... 4 more 
Caused by: java.io.IOException: Server returned HTTP response code: 400 for URL: https://api.sandbox.paypal.com/v1/vault/credit-card 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) 
    at java.lang.reflect.Constructor.newInstance(Unknown Source) 
    at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source) 
    at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source) 
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) 
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source) 
    at com.paypal.core.HttpConnection.execute(HttpConnection.java:78) 
    ... 5 more 
Caused by: java.io.IOException: Server returned HTTP response code: 400 for URL: https://api.sandbox.paypal.com/v1/vault/credit-card 
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) 
    at java.net.HttpURLConnection.getResponseCode(Unknown Source) 
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source) 
    at com.paypal.core.HttpConnection.execute(HttpConnection.java:77) 
    ... 5 more 

我的問題如下：

1. 如何我會得到異常錯誤代碼和消息，如（錯誤代碼：400，名稱：VALIDATION_ERROR，問題：值是無效的
2. 我該如何告知有關與交易發生中的基本問題用戶友好的例外買家..

在此先感謝，我在異常處理是新..希望爲積極響應

Answer 1

REST API報告您傳遞的信用卡號碼無效。我會仔細檢查一下，確保您發送的是您期望的內容，並且這是一個有效的號碼。在現場，它應該是一張真正的卡片。在沙箱中，最佳做法是使用與沙箱測試帳戶關聯的其中一個數字。

如果您仍然認爲問題出在PayPal的端上，請在https://ppmts.custhelp.com/上提交一張票幷包含錯誤中報告的debug_id。然後支持代理可以查看這種失敗的具體情況。