failed to set access: access denied ("java.lang.reflect.ReflectPermission" "suppressAccessChecks")

Can not access public com.es.plugin.RuleEntity() (from class com.es.plugin.RuleEntity; failed to set access: access denied ("java.lang.reflect.ReflectPermission" "suppressAccessChecks")

ObjectMapper requestParam = new ObjectMapper();
RuleEntity entity = requestParam.readValue(reqContent, RuleEntity.class);

解決方案：

requestParam.disable(MapperFeature.CAN_OVERRIDE_ACCESS_MODIFIERS);

參考：https://github.com/FasterXML/jackson-databind/wiki/Mapper-Features