Configuring Jersey with a servlet container + JSON

GfeResources.java

import org.codehaus.jackson.jaxrs.JacksonJsonProvider;

import javax.ws.rs.core.Application;
import java.util.HashSet;
import java.util.Set;

public class GfeResources extends Application {
    @Override
    public Set<Object> getSingletons() {
        Set<Object> res = new HashSet<Object>();
        res.add(new JacksonJsonProvider());
        return res;
    }

    public Set<Class<?>> getClasses() {
        Set<Class<?>> res = new HashSet<Class<?>>();
        res.add(FilesystemResource.class);
        return res;
    }
}

pom.xml

    <dependencies>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.4</version>
        </dependency>

        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-json</artifactId>
            <version>1.4</version>
        </dependency>
    </dependencies>

    <repositories>
        <repository>
            <id>maven2-repository.dev.java.net</id>
            <name>Java.net Repository for Maven</name>
            <url>http://download.java.net/maven/2/</url>
            <layout>default</layout>
        </repository>
    </repositories>

web.xml

	<servlet>
		<servlet-name>RestRestlet</servlet-name>
		<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
		<init-param>
			<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
			<param-value>true</param-value>
		</init-param>
		<init-param>
              <param-name>javax.ws.rs.Application</param-name>
               <param-value>gfe.server.GfeResources</param-value>
           </init-param>
	</servlet>