sandbox mode auto detect

Author: ScottWryyyyy

src/main/java/com/alipay/global/api/BaseAlipayClient.java

@@ -52,14 +52,11 @@ public BaseAlipayClient(String gatewayUrl, String merchantPrivateKey, String ali
         this.merchantPrivateKey = merchantPrivateKey;
         this.alipayPublicKey = alipayPublicKey;
         this.clientId = clientId;
-    }
 
-    public BaseAlipayClient(String gatewayUrl, String merchantPrivateKey, String alipayPublicKey, String clientId, boolean isSandboxMode) {
-        this.gatewayUrl = gatewayUrl;
-        this.merchantPrivateKey = merchantPrivateKey;
-        this.alipayPublicKey = alipayPublicKey;
-        this.clientId = clientId;
-        this.isSandboxMode = isSandboxMode;
+        // if client id starts with SANDBOX_, set to sandbox mode
+        if (clientId.startsWith("SANDBOX_")) {
+            this.isSandboxMode = true;
+        }
     }
 
     public <T extends AlipayResponse> T execute(AlipayRequest<T> alipayRequest) throws AlipayApiException {

src/main/java/com/alipay/global/api/DefaultAlipayClient.java

@@ -16,10 +16,6 @@ public DefaultAlipayClient(String gatewayUrl, String merchantPrivateKey, String
         super(gatewayUrl, merchantPrivateKey, alipayPublicKey, clientId);
     }
 
-    public DefaultAlipayClient(String gatewayUrl, String merchantPrivateKey, String alipayPublicKey, String clientId, boolean isSandboxMode) {
-        super(gatewayUrl, merchantPrivateKey, alipayPublicKey, clientId, isSandboxMode);
-    }
-
     @Override
     public Map<String, String> buildCustomHeader() {
         return null;