java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) ~[?:1.8.0_231]
at java.lang.Long.parseLong(Long.java:601) ~[?:1.8.0_231]
at java.lang.Long.valueOf(Long.java:803) ~[?:1.8.0_231]
at io.swagger.models.parameters.AbstractSerializableParameter.getExample(AbstractSerializableParameter.java:412) [swagger-models-1.5.20.jar:1.5.20]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_231]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_231]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_231]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_231]
添加注解报错,如何处理