关于Struts2用ModelDriven传值时表关联对象的问题

最近在用Struts2做一些练习,遇到一些问题,请教各位:
前台有一个添加新闻的网页addNews.jsp

 <form action="news_add" method="POST">

    	新闻标题:<input type="text" name="title"><br>

    	新闻类型:<input type="text" name="newsType"><br>

    	新闻正文:<input type="text" name="info"><br>

    	<input type="submit" value="提交">

    </form>

action类

public class NewsAction extends ActionSupport implements ModelDriven<News>

{

	public String add() throws Exception {

		System.out.println("进入添加新闻的方法!");

		

		

		System.out.println("新闻正文:"+news.getInfo());

		System.out.println("新闻正文:"+news.getTitle());

	//	System.out.println("新闻类型:"+news.getNewsType().getTitle());

		return this.SUCCESS;

	}

	@Override

	public String execute() throws Exception {

		// TODO Auto-generated method stub

		return super.execute();

	}

	private News news = new News();

	@Override

	public News getModel() {

		// TODO Auto-generated method stub

		return news;

	}

	

}

JavaBean:
News:int id,String title,info NewsType newsType;
NewsType:int id,String title,boolean enable
省略setter和getter方法

现在的问题是,jsp一提交控制台报错
警告: Error setting expression 'newsType' with value '[Ljava.lang.String;@151c590'
ognl.MethodFailedException: Method "setNewsType" failed for object net.news.vo.News@c7195b [java.lang.NoSuchMethodException: net.news.vo.News.setNewsType([Ljava.lang.String;)]



度娘关于Struts2传值的问题,举例都是单表,没有表关联的例子,恳请各位赐教,谢谢