Example of the setup in order to use Jersey1+Spring+Jackson 2 in the root path

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0"
         metadata-complete="true"
        >

    <display-name>Archetype Created Web Application</display-name>

    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>/WEB-INF/log4j.xml</param-value>
    </context-param>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/conf/applicationContext.xml
        </param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <filter>
        <filter-name>jersey-filter</filter-name>
        <filter-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</filter-class>
        <init-param>
            <param-name>com.sun.jersey.config.property.packages</param-name>
            <param-value>PUT_YOUR_JAVA_PACKAGE_HERE,com.fasterxml.jackson.jaxrs.json</param-value>
        </init-param>
        <init-param>
            <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>com.sun.jersey.config.feature.Redirect</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>com.sun.jersey.config.feature.FilterForwardOn404</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>com.sun.jersey.config.feature.ImplicitViewables</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>com.sun.jersey.config.property.WebPageContentRegex</param-name>
            <param-value>
                /(js|images|css|(JSP_LOCATION_TO_USE_AS_VIEWS))/.*
            </param-value>
        </init-param>
        <init-param>
            <param-name>com.sun.jersey.config.property.JSPTemplatesBasePath</param-name>
            <param-value>JSP_LOCATION_TO_USE_AS_VIEWS</param-value>
        </init-param>
    </filter>

    <filter-mapping>
        <filter-name>jersey-filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>