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import com.opensymphony.xwork2.ActionSupport;public class SelectTestAction extends ActionSupport {    private int city;    private int country;    public City[] getCities() {        City[] cities = null;        if (country == 1) {            cities = new City[3];            cities[0] = new City(1, "Atlanta");            cities[1] = new City(2, "Chicago");            cities[2] = new City(3, "Detroit");        } else if (country == 2) {            cities = new City[3];            cities[0] = new City(4, "Vancouver");            cities[1] = new City(5, "Toronto");            cities[2] = new City(6, "Montreal");                    } else if (country == 3) {            cities = new City[2];            cities[0] = new City(7, "Mexico City");            cities[1] = new City(8, "Tijuana");        } else {            cities = new City[0];        }        return cities;    }    public int getCity() {        return city;    }    public void setCity(int city) {        this.city = city;    }        public int getCountry() {        return country;    }    public void setCountry(int country) {        this.country = country;    }}class City {    private int id;    private String name;    public City(int id, String name) {        this.id = id;        this.name = name;    }    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }}

ApplicationListener.java

import java.util.HashMap;import java.util.Map;import javax.servlet.ServletContext;import javax.servlet.ServletContextEvent;import javax.servlet.ServletContextListener;public class ApplicationListener         implements ServletContextListener {    public void contextInitialized(ServletContextEvent cse) {        Map
   
     countries =                 new HashMap
    
     ();        countries.put(1, "US");        countries.put(2, "Canada");        countries.put(3, "Mexico");        ServletContext servletContext = cse.getServletContext();        servletContext.setAttribute("countries", countries);    }    public void contextDestroyed(ServletContextEvent cse) {    }}
    
   

select.jsp页面内容：

<%@ taglib prefix="s" uri="/struts-tags" %>
   
	
    
Select Location
	
    		
     		
         	
     	
    
   

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