java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/J

When I run junit test, encountered this error:　java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/JsonProcessingException

Solution: add the following dependencies:

<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-core</artifactId><version>2.1.0</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.1.0</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-annotations</artifactId><version>2.1.0</version></dependency>

Reference:

1.http://stackoverflow.com/questions/14333709/spring-mvc-3-2-and-json-objectmapper-issue

任何的限制，都是从自己的内心开始的。