optimize the part refund

src/main/java/com/ctrip/fun/admin/controller/order/OpEventActivityOrderController.java

@@ -420,7 +420,9 @@ public class OpEventActivityOrderController extends AbstractOpOrderController<Ev
             	String[] playerNumArray = playerNum.trim().split(",");
             	boolean invalidNum=false;
             	if(playerNumArray.length == 0){
-            		players.add(Integer.valueOf(playerNum.trim()));
+            		if(playerNum.trim() != null && !"".equals(playerNum.trim())){
+            			players.add(Integer.valueOf(playerNum.trim()));
+            		}
             	}else{
             		for (String playerNumStr : playerNumArray) {
 	            		if(playerNumStr.trim() != null && !"".equals(playerNumStr.trim())){
@@ -434,11 +436,12 @@ public class OpEventActivityOrderController extends AbstractOpOrderController<Ev
             			break;
             		}
 				}
-            	if(invalidNum){
+            	quantity = players.size();
+            	boolean exceed = (quantityLimit<quantity);
+            	if(invalidNum || exceed){
             		map.addAttribute("message", "退款打球人序号不正确，请检查！");
                 	return "error";
             	}
-            	quantity = players.size();
             	processBean.setPlayerNum(playerNum.trim());
             }
             BigDecimal refundTotalAmount = orderBean.getPrePayCardRefundAmount().add(orderBean.getRefundAmount());