Using jackson in tomee as JAXB-Json provider

Jackson is fast JSON processor with nice default behavior, e.g. single element collections are represented as JSON arrays, and there are no wrapping elements.

Because the default is already reasonable, there is no additional configuration needed. The provider can be specified directly in the /src/main/webapp/WEB-INF/openejb-jar.xml descriptor:

<openejb-jar xmlns="http://www.openejb.org/openejb-jar/1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openejb.org/openejb-jar/1.1">
    <pojo-deployment class-name="jaxrs-application">
        <properties>
            cxf.jaxrs.providers = com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider
        </properties>
    </pojo-deployment>
</openejb-jar>

In addition the jackson dependency needs to be declared in the pom.xml:

<dependency>
	<groupId>com.fasterxml.jackson.jaxrs</groupId>
	<artifactId>jackson-jaxrs-json-provider</artifactId>
	<version>2.4.3</version>
</dependency>

A better solution would be to install jackson directly on the server (/apache-tomee-plus-1.7.1/lib), what would keep your WAR skinny.

via: http://www.adam-bien.com/roller/abien/entry/using_jackson_in_tomee_as