struts常用标签库（Struts common tag library）.doc

struts常用标签库（Struts common tag library） Struts2 common tag summary I. Introduction The role of 1.Struts2 The Struts2 tag library provides themes and template support, greatly simplifying the writing of view pages, and the Struts2 themes and templates provide good scalability. Better code reuse is achieved. Struts2 allows you to use custom components on your page, which fully meets the complex and ever-changing needs of page display in your project. There is a huge improvement in the Struts2 tag library, and the label of the Struts2 tag library does not depend on any presentation layer technology, that is, strtus2 provides most of the tags that can be used in a variety of presentation technologies. These include the most commonly used JSP pages, as well as the use of template technologies such as Velocity and FreeMarker 2.Struts2 classification (1) UI Tags: (User, Interface, user interface) tags are mainly used to generate HTML element tags, and UI tags can be divided into form tags and non form tags (2) non UI tags, mainly used for data access, logic control and other labels. Non UI tags can be divided into process control tags (including for label branch and circulation flow control) and data access label (including user output value in ValueStack, internationalization functions) (3) Ajax tag 3.Struts2 tag preparation before use: (1) introducing a tag library into the JSP page to use tags: %@ taglib uri= /struts-tags prefix= s% (2) declare the tags you want to use in web.xml, which is how the Struts2 2.3.1.2 version is introduced filter filter-namestruts2/filter-name filter-classorg.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter/filter-class /filter 4. label usage (1) property tag Used to output the specified value: s:property value=, %{@cn.csdn.hr.domain.User@Name}, /br/ s:property value= @cn.csdn.hr.domain.User@Name /Br/! -- the above two methods can -- s:property value= (%{@cn.csdn.hr.domain.User@study)} / The way in which you can access the