CODEWITHSUNDEEP
javajsonrestrestlet
GionJh
GionJh

Reputation: 2894

Restlet and Jackson: java.lang.NoClassDefFoundError: org/codehaus/jackson/JsonFactory

I'm trying to make Restlet work with Jackson with the following Java code: 

public class HelloWorldResource extends ServerResource{
    @Get("json")
    public Todo represent()
    {
        Todo t = new Todo();
        t.setId("1");
        t.setDescription("hello");
        t.setSummary("world");

     return t;
    }
    //...
}

When I run the program I get an error:

java.lang.NoClassDefFoundError: org/codehaus/jackson/JsonFactory

These are the jars I'm using:

enter image description here

Why can't it find the dependencies?

EDIT:

I solved the problem by adding this jar to the classpath.

I'm still interested to know if there are some mistakes/redundancies in the jars I'm adding.

Upvotes: 2

Views: 1624

Answers (1)

Thierry Templier
Thierry Templier

Reputation: 202346

You should configure your application using Maven. That way, we will have automatically all required dependencies (included dependencies of dependencies transitively).

In your case, we could use something like that within your file pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
            http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.restlet</groupId>
    <artifactId>restlet-maven-sample</artifactId>
    <name>${project.artifactId}</name>
    <packaging>war</packaging>
    <version>1.0.0-snapshot</version>

    <properties>
        <restlet-version>2.3.1</restlet-version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.restlet.jee</groupId>
            <artifactId>org.restlet</artifactId>
            <version>${restlet-version}</version>
        </dependency>

        <dependency>
            <groupId>org.restlet.jee</groupId>
            <artifactId>org.restlet.ext.jackson</artifactId>
            <version>${restlet-version}</version>
        </dependency>

        <dependency>
            <groupId>org.restlet.jee</groupId>
            <artifactId>org.restlet.ext.servlet</artifactId>
            <version>${restlet-version}</version>
        </dependency>

        <dependency>
            <groupId>org.restlet.jee</groupId>
            <artifactId>org.restlet.ext.xml</artifactId>
            <version>${restlet-version}</version>
        </dependency>
    </dependencies>

    <repositories>
        <repository>
            <id>maven-restlet</id>
            <name>Public online Restlet repository</name>
            <url>http://maven.restlet.com</url>
        </repository>
    </repositories>
</project>

Hope it helps you, Thierry

Upvotes: 1

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