设计菜单实体类如下:
public class Menu implements Serializable { private int id; private String menuName; // 菜单名称 private String menuUrl; // 菜单url private int menuParent; // 父菜单编号 private List<Menu> children;// 子菜单}
????????????????????????????????????????????????????
在jsp如何使用Struts标签遍历显示:
我的代码:
<!-- 菜单开始 --><s:iterator id="menu" value="menus"> <h1><s:property value="menuName" /></h1><!--一级菜单,测试通过--> <div class="content"> <ul class="MM"> <s:iterator id="subMenu" value="#menu.children" /><!--二级菜单,现在就是二级菜单遍历有误,页面编译不通过--> <li><a href="http://www.865171.cn" target="main"><s:property value="subMenu.menuName" /></a></li> </s:iterator> </ul> </div></s:iterator><!-- 菜单结束 -->
回复讨论(解决方案)
错误是:org.apache.jasper.JasperException: /menu.jsp(177,3) The end tag "
menus 你迭代它?没看到list定义为menu的
menus 你迭代它?没看到list定义为menu的
使用for循环遍历可以,但是使用s标签不可以,麻烦帮忙看下标签哪里有错误。
<!-- 菜单开始 --> <% List<Menu> ml = (List<Menu>)request.getAttribute("menus"); System.out.println("*************pan****************:"+ml); for(int i = 0; i < ml.size(); i++){ %> <h1 class="type"><a href="javascript:void(0)"><%=ml.get(i).getMenuName() %></a></h1> <div class="content"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td><img src="/static/imghwm/default1.png" data-src="images/menu_topline.gif" class="lazy" style="max-width:90%" style="max-width:90%" / alt="Struts nested traversal_html/css_WEB-ITnose" ></td> </tr> </table> <ul class="MM"> <% System.out.println("一:"); for(int j = 0; j < ml.get(i).getChildren().size(); j++){ %> <li><%=ml.get(i).getChildren().get(j).getMenuName() %></li> <% } %> </ul> </div> <% } %> <!-- 菜单结束 -->
最终也没有用Struts标签实现,淡淡的忧伤。

The future of HTML will develop in a more semantic, functional and modular direction. 1) Semanticization will make the tag describe the content more clearly, improving SEO and barrier-free access. 2) Functionalization will introduce new elements and attributes to meet user needs. 3) Modularity will support component development and improve code reusability.

HTMLattributesarecrucialinwebdevelopmentforcontrollingbehavior,appearance,andfunctionality.Theyenhanceinteractivity,accessibility,andSEO.Forexample,thesrcattributeintagsimpactsSEO,whileonclickintagsaddsinteractivity.Touseattributeseffectively:1)Usese

The alt attribute is an important part of the tag in HTML and is used to provide alternative text for images. 1. When the image cannot be loaded, the text in the alt attribute will be displayed to improve the user experience. 2. Screen readers use the alt attribute to help visually impaired users understand the content of the picture. 3. Search engines index text in the alt attribute to improve the SEO ranking of web pages.

The roles of HTML, CSS and JavaScript in web development are: 1. HTML is used to build web page structure; 2. CSS is used to beautify the appearance of web pages; 3. JavaScript is used to achieve dynamic interaction. Through tags, styles and scripts, these three together build the core functions of modern web pages.

Setting the lang attributes of a tag is a key step in optimizing web accessibility and SEO. 1) Set the lang attribute in the tag, such as. 2) In multilingual content, set lang attributes for different language parts, such as. 3) Use language codes that comply with ISO639-1 standards, such as "en", "fr", "zh", etc. Correctly setting the lang attribute can improve the accessibility of web pages and search engine rankings.

HTMLattributesareessentialforenhancingwebelements'functionalityandappearance.Theyaddinformationtodefinebehavior,appearance,andinteraction,makingwebsitesinteractive,responsive,andvisuallyappealing.Attributeslikesrc,href,class,type,anddisabledtransform

TocreatealistinHTML,useforunorderedlistsandfororderedlists:1)Forunorderedlists,wrapitemsinanduseforeachitem,renderingasabulletedlist.2)Fororderedlists,useandfornumberedlists,customizablewiththetypeattributefordifferentnumberingstyles.

HTML is used to build websites with clear structure. 1) Use tags such as, and define the website structure. 2) Examples show the structure of blogs and e-commerce websites. 3) Avoid common mistakes such as incorrect label nesting. 4) Optimize performance by reducing HTTP requests and using semantic tags.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

WebStorm Mac version
Useful JavaScript development tools

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

Notepad++7.3.1
Easy-to-use and free code editor
