Generic Tags: property, set, Bean,include,param,debug
Control Tags: if elseif else, iterator, subset
UI Tags: theme, default simple XHTML, Css_xhtml, Ajax
Ajax Tags: supplemental
The difference between $#%
$ for i18n, struts configuration file
#取得actionContext的值
% will parse the original text attribute to OGNL,
INDEX.JSP:
<?xml version= "1.0" encoding= "GB18030"? ><%@ page language= "java" contenttype= "text/html; charset=gb18030 " pageencoding=" GB18030 "%><%string ContextPath = Request.getcontextpath ();%><! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">Tagsaction:
Package Com.bjsxt.struts2.tags;import Com.opensymphony.xwork2.actionsupport;public Class Tagsaction extends Actionsupport {private string Password;private string Username;public tagsaction () {}public string execute () { This.addfielderror ("Fielderror.test", "wrong!"); return SUCCESS;} Public String GetPassword () {return password;} Public String GetUserName () {return username;} public void SetPassword (String password) {this.password = password;} public void Setusername (String username) {this.username = username;}}Struts.xml:
<?xml version= "1.0" encoding= "UTF-8"? ><! DOCTYPE struts public "-//apache software foundation//dtd struts Configuration 2.0//en" "/http Struts.apache.org/dtds/struts-2.0.dtd "><struts> <!--<constant Name=" Struts.enable.DynamicMethodInvocation "value=" false "/>--> <constant name=" Struts.devmode "value=" True "/> <!--<constant name=" struts.ognl.allowStaticMethodAccess "value=" true "></constant>- - <constant name= "Struts.ui.theme" value= "simple"/><package name= "tags" extends= "Struts-default" > <action name= "tags" class= "com.bjsxt.struts2.tags.TagsAction" > <result>/tags.jsp</ result> </action> </package></struts>TAGS.JSP:
<!--Property Label--<body><ol> <li>property: <s:property value= "username"/> </li><li>property Value is string: <s:property value= "' username '"/> </li><li>property set Default: <s:property value= "admin" default= "admin"/> </li><li>property set HTML: <s:property value= "'<!--set Label--variable name is too long to be used when changing names<!--set has a scope, you can choose Page, Request,session, application,action, default is action and request-->
Do not write scope, say the default action and request, if you specify a different scope, you cannot use the action to take a value
<li> Set AdminName value (default to request and Actioncontext): <s:set var= "AdminName" value= "username"/></li> <li>set from Request: <s:property value= "#request. AdminName"/></li><li>set value from Actioncontext: <s:property value= "#adminName"/></li><li>set Set Range: Page<s:set name= "AdminPassword" value= " Password "scope=" page "/></li><li>set value from the corresponding range: <%=pagecontext.getattribute (" AdminPassword ")%> </li>
<li>set set Var, range is session: <s:set var= "AdminPassword" value= "password" scope= "session"/></li>< Li>set use # to value: <s:property value= "#adminPassword"/> </li> <!--do not get--><li>set from the corresponding range: <s: Property value= "#session. AdminPassword"/> </li>
<!--Bean Labels--<li>bean defines the bean and uses Param to set the new property value: <s:bean name= "Com.bjsxt.struts2.tags.Dog" ><s:param name= "name" Value= "' pp '" ></s:param><s:property value= "name"/></s:bean></li><!-- The difference from the above is that there is a var below, which will be put into action, even if </s:bean> ends, Var already exists in Actioncontext, can also be taken out of the Actioncontext-
<li>bean View Debug Condition: <s:bean name= "Com.bjsxt.struts2.tags.Dog" var= "Mydog" > <s:param name= "name" value= "' Oudy '" ></s:param></s:bean> Fetch value: <s:property value= "#myDog. Name"/></li><!--include tags--try not to
<%@ include> static inclusions
<!include> Dynamic Inclusion
</li>$,#,% differences:
$: For i18n and Struts configuration files
#: Get the value of Actioncontext
%: Resolves the original text attribute to OGNL, which is not a function of OGNL
<!--fielderror Label--<li><s:fielderror fieldname= "Fielderror.test" theme= "simple" ></s:fielderror></li><!--ifelse Label--
Add &age=9&age=20 in the URL<li>if ElseIf Else:
Age = <s:property value= "#parameters. age[0]"/> <br/>
<s:set var= "Age" value= "#parameters. age[0]"/>
<s:if test= "#age < 0" >wrong age!</s:if>
<s:elseif test= "#parameters. Age[0] <" >too young!</s:elseif>
<s:else>yeah!</s:else><br/>
<s:if test= "#parameters. AAA = = NULL" >null</s:if>
</li>
struts2--Label
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