Java——使用ObjectMapper.writeValueAsString时报错The type com.fasterxml.jackson.core.JsonProcessingException cannot be resolved. It is indirectly referenced from required .class files

 报错信息：

   The type com.fasterxml.jackson.core.JsonProcessingException cannot be resolved. It is indirectly referenced from required .class files

报错截图：

原因：缺少引用的jar包

在引入jar包时，只引入了databind包，而没有引入core包