how to populate drop down with prepare interface

i saw a link struts2 drop down but i am unable to understand how to use prepare interceptor. how will request be forwarded to jsp and view method will be called

can anyone give me a example?

  public class YourAction extends ActionSupport {

public String prepare(){
     // populate your开发者_C百科 drop down object
}   

public String view(){
     // forward to your jsp
     return SUCCESS;
}

 }

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Interceptors are invoked before and/or after the execution of action depending on the interceptor type.In your case the prepare interceptor is used. To understand the workflow of the interceptors in general take a look here

Regarding the prepare interceptors you should read this article before using it.

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Try to use method name prepareView() instead of prepare().

As, prepare() will be called before any method in this class and prepareView() will be called only before view().