jaxb 使用之 marshall List unmarshall

@XmlElement
public class Post {
	private long id;	//帖子编号
	private String tiebaName;	//贴吧名称
	private String url;		//帖子url
	private String title;	//标题
	private String author;	//作者
 //... setter getter
}

@XmlRootElement(name="jaxbList")
public class PostList {
	
	private List<Post> element = new ArrayList<Post>();
	@XmlElement
	public List<Post> getElement() {
		return element;
	}

	public void setElement(List<Post> element) {
		this.element = element;
	}
	
}

如果将@XmlElement注解应用到element字段上面，则会报异常， 搞不懂 ， 先放一下

	PostList postList = new PostList();
		postList.getElement().add(post);
		postList.getElement().add(post2);
		marshallList(postList, path + "posts111.xml", path+"posts.xsd");

PostList pl = unmarshallList(PostList.class, path + "posts111.xml", path+"posts.xsd");
		for(Post p : pl.getElement()){
			System.out.println(p.getAuthor());
			System.out.println(p.getId());
		}

marshall unmarshall 相关代码

public static <T> void marshallList(PostList jaxbList,String xmlPath,String xsdPath)throws Exception{
		JAXBContext context = JAXBContext.newInstance(jaxbList.getClass());
		Marshaller ms = context.createMarshaller();
		if(xsdPath != null){
			try {
				File xsdFile = new File(xsdPath);
				Schema schema =  SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI)
				.newSchema(xsdFile);
				ms.setSchema(schema);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		ms.marshal(jaxbList, new File(xmlPath));
	}

	public static <T> PostList unmarshallList(Class<PostList> clazz,String xmlPath,String xsdPath) throws Exception{
		JAXBContext context = JAXBContext.newInstance(clazz);
		Unmarshaller ums = context.createUnmarshaller();
		if(xsdPath != null){
			try {
				File xsdFile = new File(xsdPath);
				Schema schema =  SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI)
				.newSchema(xsdFile);
				ums.setSchema(schema);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		PostList jaxbList = (PostList) ums.unmarshal(new File(xmlPath));
		return jaxbList;
	}