model.addAttribute存储list和对象具体应用

　　①如果在后台存储的list　　

　　model.addAttribute("slideList", flashManageExtendMapper.selectByMap(map));

public void getSlideList(Model model, String cnEn){
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("cnEn", cnEn);
        map.put("display", 'Y');
        model.addAttribute("slideList", flashManageExtendMapper.selectByMap(map));
    }

 

　　在jsp中引用使用如下

<div class="index_banner" id="banner">
        <div id="slides" >   
            <c:if test="${fn:length(slideList) > 1}">
                <c:forEach var="slide" items="${slideList }" varStatus="status">
                    <img src="${base }/uploadFile/${slide.imgAddress}" width="100%" height="543"/>
                </c:forEach>
            </c:if> 
            <c:if test="${fn:length(slideList) == 1}">
                <c:forEach var="slide" items="${slideList }" varStatus="status">
                    <img src="${base }/uploadFile/${slide.imgAddress}" width="100%" height="543"/>
                </c:forEach>
            </c:if> 
            <c:if test="${fn:length(slideList) == 0}">
                <img src="${base }/resources/index/images/banner2.jpg" width="100%" height="543"/>
            </c:if>  
            
        </div>
    </div>

　　

　　②如果后台存储的是对象indexPage

   model.addAttribute("indexPage", indexPage == null ? new IndexPage() : indexPage);

@Cacheable(value="indexPageCache", key="#cnEn")
    public void getIndexPage(Model model, String cnEn){
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("cnEn", cnEn);
        IndexPage indexPage = indexPageExtendMapper.selectByMap(map);
        model.addAttribute("indexPage", indexPage == null ? new IndexPage() : indexPage);
    }

　　在jsp中引用如下

<div class="web_item item_mar">
    <a href="${indexPage.linkImg2Page }" target="_blank">
　　　　<img src="${base }/uploadFile/${indexPage.linkImg2}" width="240" height="120" />
    </a>
</div>