Static parameters could be defined into an action through xwork.xml like bellow:

<action name="myAction" class=" ... ">
     <param name="myStaticParam1">myStaticValue1</param>
     <param name="myStaticParam2">myStaticValue2</param>
     <param name="myStaticParam3">myStaticValue3</param>
  </action>

+ Method A +
Have the action class itself implements com.opensymphony.xwork.config.entities.Parameterizable and the static parameters will be set into it through the setParams(Map) method. In the example above, the key and value will be as tabulated below:

+ Method B +
Have the action class itself define getter/setter for the static parameter itself and those static parameter will be set through those setter and getter. In the case above, the action class could be as follows:

public class MyAction extends ActionSupport {
     ...
     
     public String getMyStaticParam1() { ....}
     public void setMyStaticParam1(String myStaticParam1) { ... }

     public String getMyStaticParam2() { ... }
     public void setMyStaticParam2(String myStaticParam2) { ... }
  
     public String getMyStaticParam3() { ... }
     public void setMyStaticParam3(String myStaticParam3) { ... }

     ...
  }

The getter and setter, will be set appropriately.

NOTE: For this to work, 'static-params' interceptor must be added to the action.

@see com.opensymphony.xwork.interceptor.StaticParametersInterceptor
@see com.opensymphony.xwork.config.entities.Parameterizable