Fork me on GitHub
Edit on GitHub << back to Tag Reference

action

Please make sure you have read the Tag Syntax document and understand how tag attribute syntax works.

Description

Execute an action from within a view

Parameters can be passed to the action using nested param tags.

Placement in context

The action will not be published to the context until the whole tag is evaluated, meaning that inside the body of the tag, the action cannot be accessed, For example:

<s:action var="myAction" name="MyAction" namespace="/">
    Is "myAction" null inside the tag? <s:property value="#myAction == null" />
</s:action>
    Is "myAction" null outside the tag? <s:property value="#myAction == null" />

Will print:

Is "myAction" null inside the tag? true

Is "myAction" null outside the tag? false

Execute an action from within a view

Attributes

Dynamic Attributes Allowed:

false
 

Name

Required

Default

Evaluated

Type

Description

executeResult false false false Boolean Whether the result of this action (probably a view) should be executed/rendered
flush false true false Boolean Whether the writer should be flush upon end of action component tag, default to true
ignoreContextParams false false false Boolean Whether the request parameters are to be included when the action is invoked
name true false String Name of the action to be executed (without the extension suffix eg. .action)
namespace false namespace from where tag is used false String Namespace for action to call
performClearTagStateForTagPoolingServers false false false Boolean Whether to clear all tag state during doEndTag() processing (if applicable)
rethrowException false false false Boolean Whether an exception should be rethrown, if the target action throws an exception
var false false String Name used to reference the value pushed into the Value Stack (scope: action).

Examples

 public class ActionTagAction extends ActionSupport {

  public String execute() throws Exception {
      return "done";
  }

  public String doDefault() throws Exception {
      ServletActionContext.getRequest().setAttribute("stringByAction", "This is a String put in by the action's doDefault()");
      return "done";
  }
 }

   <struts>
      ....
     <action name="actionTagAction1" class="tmjee.testing.ActionTagAction">
         <result name="done">success.jsp</result>
     </action>
      <action name="actionTagAction2" class="tmjee.testing.ActionTagAction" method="default">
         <result name="done">success.jsp</result>
     </action>
      ....
   </struts>

The following action tag will execute result and include it in this page

  <s:action name="actionTagAction" executeResult="true" />

The following action tag will do the same as above, but invokes method specialMethod in action</span>

  <s:action name="actionTagAction!specialMethod" executeResult="true" />

The following action tag will not execute result, but put a String in request scope under an id stringByAction which will be retrieved using property tag</span>

  <s:action name="actionTagAction!default" executeResult="false" />
  <s:property value="#attr.stringByAction" />