在Jsp中怎么导入Java类

1.目录结构

2.在form.jsp中导入City类

<%@ page import="包名.类名" %>

<%@ page import="struts2.City" %>

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为什么需要在form.jsp中导入City类？

如不导入City类，那么List cities=new ArrayList();则不能实例化。

Struts中的用法

City.java代码：

package struts2;

public class City {
	private Integer cityId;
	private String	cityName;
	public Integer getCityId() {
		return cityId;
	}
	public void setCityId(Integer cityId) {
		this.cityId = cityId;
	}
	public String getCityName() {
		return cityName;
	}
	public void setCityName(String cityName) {
		this.cityName = cityName;
	}
	
	//有参构造器
	public City(Integer cityId, String cityName) {
		super();
		this.cityId = cityId;
		this.cityName = cityName;
	}
	
	//无参构造器
	public City() {
		
	}
}

<%@ page language="java" cOntentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page import="java.util.ArrayList" %>
<%@ page import="java.util.List" %>
<%@ page import="struts2.City" %>






	<% 
		List cities=new ArrayList();
		cities.add(new City(1,"AA"));
		cities.add(new City(2,"BB"));
		cities.add(new City(3,"CC"));
		cities.add(new City(4,"DD"));
		
		request.setAttribute("city1",cities);
	%>