struts2动态结果集

<action name="login" class="cn.orlion.user.UserAction" method="login">
             <result>
                 ${r}
             </result>
         </action>

package cn.orlion.user;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport{
    
    private int type;
    
    private String r;
    
    public String login(){
        
        if (1 == type) r = "/a1.jsp";
        else if (2 == type) r = "/a2.jsp";
        return "success";
    }

    public int getType() {
        return type;
    }

    public void setType(int type) {
        this.type = type;
    }

    public String getR() {
        return r;
    }

    public void setR(String r) {
        this.r = r;
    }
    
}