Calling static method helper class in Struts2 JSP with Action data model value

Question

I\'m a Struts2 newbie. I\'m using Struts2 with the typical datamodel UserItem inside an Action. The datamodel doesn\'t look good when using with the Struts ta

Answer 1

EDIT

From 2.3.20 and higher, static method access won't work anymore, even if activated in the configuration.

---

For static methods access you need:

in Struts.xml

<constant name="struts.ognl.allowStaticMethodAccess" value="true"/>

in your JSP

<s:property value="@com.your.full.package.Classname@methodName(optionalParameters)" />

But as pointed out by rees, this should be avoided if not strictly necessary, because it's not a best practice.

In your specific case, i guess the Object containing ["String1","String2",...] is a List, or a Vector, or something like this.

Then all you need in your JSP is the <s:iterator> tag like this:

<s:iterator name="yourObjectContainingAListOfString">
   <s:property /> 
   <br/>
</s:iterator>

Answer 2

For Static Method Access you must need to add following constant in your struts.xml file.

<constant name="struts.ognl.allowStaticMethodAccess" value="true"/> 

Example: struts.xml:

<!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.ognl.allowStaticMethodAccess" value="true"/>
    <package name="default"  namespace="/" extends="struts-default">
        <action name="sampleAction" class="vaannila.SampleAction">
            <result name="success">/WEB-INF/JSP/sample.jsp</result>
        </action>     
    </package>
</struts>

Then from your JSP you can access it in various ways:

Example - 1:

<b>Output :</b> <s:property value="@vaannila.SampleAction@getSTR()"/> <br>

Where,

1. vaannila = Package Name.
2. SampleAction = Class Name.
3. getSTR() = Method Name.

Example - 2:

<b>Output :</b> <s:property value="@vs@getSTR()"/> <br>

Where,

1. vs = Value Stack.
2. getSTR() = Method Name.

Example - 3:

<b>Output :</b> <s:property value="%{STR}"/> <br>

where,

1. STR = STR is declared and initialized as Static String with getter and setter method in your Java Class