Packages
org.codehaus.jackson  
org.codehaus.jackson.impl This package contains parser and generator implementation classes.
org.codehaus.jackson.io  
org.codehaus.jackson.map This package contains basic mapper (conversion) functionality that allows for converting between regular streaming json content and various tree/object-based alternatives.
org.codehaus.jackson.map.impl  
org.codehaus.jackson.sym  
org.codehaus.jackson.util