解决jackson报错：java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException

Spring Boot 项目运行时包jackson的错误：

java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException
at org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter.<init>(AllEncompassingFormHttpMessageConverter.java:91) ~[spring-web-5.3.10.jar:5.3.10]
at org.springframework.web.filter.FormContentFilter.<init>(FormContentFilter.java:61) ~[spring-web-5.3.10.jar:5.3.10]
......
java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_202]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_202]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[?:1.8.0_202]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_202]
at org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter.<init>(AllEncompassingFormHttpMessageConverter.java:91) ~[spring-web-5.3.10.jar:5.3.10]
at org.springframework.web.filter.FormContentFilter.<init>(FormContentFilter.java:61) ~[spring-web-5.3.10.jar:5.3.10]

把jackson升级到2.9.4解决：

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.9.4</version>
</dependency>