ClassNotFoundException:org.springframework.http.converter.json.MappingJacksonHttpMessageConverter

我完全是Spring的初学者(你可以在我的代码中看到:)).我只想测试RestTemplate类,但我得到了一个ClassNotFoundException.
所以代码是:

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.web.client.RestTemplate;
public class RestClient {
    private RestTemplate restTemplate;
    public String getJiraIssueAsJson(){
        Object o = restTemplate.getForObject(..., Object.class);
        System.out.println("..."+o.getClass());
        return null;
    }
    public void setRestTemplate(RestTemplate restTemplate) {
        this.restTemplate = restTemplate;
    }
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("rest-client-context.xml");
        RestClient restClient = context.getBean("restClient", RestClient.class);
        restClient.getJiraIssueAsJson();
    }
}

的context.xml

的pom.xml

    4.0.0
    
        com.googlecode.happymarvin
        parent
        1.0-SNAPSHOT
    
    jiraminer
    Happy Marvin JIRA Miner
    jar
    http://maven.apache.org
    
        UTF-8
        1.9.13
    

父pom.xml

    4.0.0
    com.googlecode.happymarvin
    parent
    1.0-SNAPSHOT
    pom
    Happy Marvin parent project
    http://maven.apache.org
    
        UTF-8
        4.0.0.RELEASE
    
    
        
            org.springframework
            spring-core
            ${org.springframework.version}
        
        
            org.springframework
            spring-web
            ${org.springframework.version}
        
    

例外

Jan 07, 2014 10:18:24 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@730eb2f0: startup date [Tue Jan 07 10:18:24 GMT 2014]; root of context hierarchy
Jan 07, 2014 10:18:24 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [rest-client-context.xml]
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'restTemplate' defined in class path resource [rest-client-context.xml]: Cannot create inner bean 'org.springframework.http.converter.json.MappingJacksonHttpMessageConverte????r#77624896' of type [org.springframework.http.converter.json.MappingJacksonHttpMessageConverte????r] while setting bean property 'messageConverters' with key [0]; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.http.converter.json.MappingJacksonHttpMessageConverte????r] for bean with name 'org.springframework.http.converter.json.MappingJacksonHttpMessageConverte????r#77624896' defined in class path resource [rest-client-context.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.http.converter.json.MappingJacksonHttpMessageConverte????r
...
Caused by: java.lang.ClassNotFoundException: org.springframework.http.converter.json.MappingJacksonHttpMessageConverte????r

当我尝试从eclipse运行main方法时,我有这个异常.
我可以想到一些像春天的罐子看不到但我不知道为什么......你能帮助我吗？