fix bug

mallinkService/src/main/java/com/iformall/service/impl/WxCouponServiceImpl.java

@@ -1535,7 +1535,7 @@ public class WxCouponServiceImpl implements WxCouponService {
 			}
 			Long makeMerchantId = coupon.getMakeMerchantId();
 			//
-			StringBuffer merchantParams = new StringBuffer("{\"tenantId\":").append(mallTenantEntity.getTenantId()).append(",\"mallMerchantParams\":").append("[");
+			StringBuffer merchantParams = new StringBuffer("[{\"tenantId\":").append(mallTenantEntity.getTenantId()).append(",\"mallMerchantParams\":").append("[");
 			Long[] mids = wxCoupon.getMerchantIds();
 			for (int i = 0 ;i < mids.length; i++ ){
 				merchantParams.append("{\"id\":").append(mids[i]).append("}");
@@ -1543,13 +1543,13 @@ public class WxCouponServiceImpl implements WxCouponService {
 					merchantParams.append(",");
 				}
 			}
-			merchantParams.append("]");
+			merchantParams.append("]}]");
 			coupon.setChildMerchantParams(merchantParams.toString());
 			checkCouponMerchantReceiver(coupon,true);
 	        final IdWorker idWorker = IdWorker.get();
 			updateCouponMerchants(coupon,idWorker);
 			//平台券设置商管商户
-			if (null == makeMerchantId) {	
+			if (null == makeMerchantId && null != coupon.getMakeMerchantId()){	
 				wxCouponMapper.setMakeMerchantId(coupon);
 			}
 		}catch(Exception e) {