需要加
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.2</version>
</dependency>
个人理解:
![](https://img2020.cnblogs.com/blog/1110188/202006/1110188-20200625083452763-952301481.png)
比如这种NoClass 应该想到是缺少jar
转载于:https://my.oschina.net/alyouge/blog/1580854