代码优化

performance-web/src/main/java/com/clx/performance/service/impl/thirdparty/nbbank/NbBankThirdpartyServiceImpl.java

@@ -77,8 +77,7 @@ public class NbBankThirdpartyServiceImpl implements NbBankThirdpartyService {
                 fis.write(buffer, 0, count);
             }
         }finally {
-
-            fis.close();
+            if (fis != null){fis.close();}
             bis.close();
         }
     }