br /> "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
/Hello.jsp
/404.jsp
/404.jsp
action调用add方法添加用户
调用第一种action方法
/user_add_success.jsp
URL动态传参调用相关的方法执行
调用第二种action方法,user定位到类,!后面跟方法名
/user_add_success.jsp
添加学生
删除学生
不过,一定要遵守"约定优于配置"的原则
/Student{1}_success.jsp
两个**号匹配一切,------------------------------
不过,一定要遵守"约定优于配置"的原则
添加老师
删除老师
添加课程
删除课程
/{1}_{2}_success.jsp
添加用户
ModelDriven传值.默认是实现ModelDriven接口,实现getModel方法,
然后在uri传值中,就可以不用在封装数据,会自动封装到实体类中,这个要在类中实例化实体类对象
添加用户//封装到对象里面了,对象是谁new的?底层.....
--------------------------
/{1}_{2}_success.jsp
地址栏不显示要跳转的**.jsp 是同一个栈,是同一个线程内局部变量
地址栏显示**.jsp 就是跳转页面,没有经过action
链式跳转,chain指定的是r1 意思是跳转到另一个action的name为r1的那个跳转页面,再由r1action 跳转到指定页面,地址栏不会显示**,jsp 可以跳转到action中,也可以直接跳转到一个jsp页面,但是action可以传参,但是jsp页面不可以传参 action的内容保存在valuestack中 jsp中属性在actioncontext中保存
先跳转到action的name为r2的,再有那个action跳转到指定页面,地址栏显示**.jsp
可以跳转到action中,也可以直接跳转到一个jsp页面,但是action可以传参,但是jsp页面不可以传参 action的内容保存在valuestack中 jsp中属性在actioncontext中保存
jsp中写法 :

HTMLtagsdefinethestructureofawebpage,whileattributesaddfunctionalityanddetails.1)Tagslike,,andoutlinethecontent'splacement.2)Attributessuchassrc,class,andstyleenhancetagsbyspecifyingimagesources,styling,andmore,improvingfunctionalityandappearance.

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.


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