Struts result param详细设置

<result type="json">
				<!-- 这里指定将被Struts2序列化的属性，该属性在action中必须有对应的getter方法 -->
				<!-- 默认将会序列所有有返回值的getter方法的值，而无论该方法是否有对应属性 -->
				<param name="root">dataMap</param>
				<!-- 指定是否序列化空的属性 -->
				<param name="excludeNullProperties">true</param>
				<!-- 这里指定将序列化dataMap中的那些属性 -->
				<param name="includeProperties">
     				userList.*
				</param>
				<!-- 这里指定将要从dataMap中排除那些属性，这些排除的属性将不被序列化，一半不与上边的参数配置同时出现 -->
				<param name="excludeProperties">
     				SUCCESS
				</param>
</result>

<!-- 新闻跳转管理 -->
		<action
			name="news"
			class="newsAction">
			<result>/content/news/index.jsp</result>
			<result
				name="update"
				type="json" />
			<!--<result
				name="detail">/content/news/detail.jsp</result>
			-->
			<result
				name="detail"
				type="json">
				<param
					name="includeProperties">name,list.*,feeds.*</param>
			</result>
		</action>

private String name;
	private INewsService newsService;
	private List list;
	private WeiboFeeds feeds = new WeiboFeeds();
	private Map<String, Object> session;

	public WeiboFeeds getFeeds() {
		return feeds;
	}

	public void setFeeds(WeiboFeeds feeds) {
		this.feeds = feeds;
	}

	public List getList() {
		return list;
	}

	public void setList(List list) {
		this.list = list;
	}

	public INewsService getNewsService() {
		return newsService;
	}

	public void setNewsService(INewsService newsService) {
		this.newsService = newsService;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

$("#subForm").click(function() {
				var url = "news!retrieveById.action";
				$.ajax({
							url : url,
							cache : false,
							data : {
								"name" : "I love You！"
							},
							type : "POST",
							datatype : "json",
							success : function(data) {
								// alert(data.feeds.id);
								var result = "";
								$.each(data.list, function(index, value) {
											result += (index + "[==]" + value[index]);
										});
								result += "//////////////////////\r";
								$.each(data.list[1], function(index, value) {
											result += (index + "[==]" + value);
										});
								alert(result);
							}
						});
			});

http://www.open-open.com/lib/view/open1325518231062.html