Spring 4.x org.springframework.http.converter.json.MappingJacksonHttpMessageConverter ClassNotFoundException:

Spring 4.x 

The first major version of Jackson is no longer supported in Spring 4. The class you want to use is now org.springframework.http.converter.json.MappingJackson2HttpMessageConverter. Make sure that you have com.fasterxml.jackson.core/jackson-core/2.x.x on your classpath.

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原文地址：https://www.cnblogs.com/exmyth/p/4337255.html