JSP简单练习-EL表达式操作JavaBean

/*
 * javaBean代码
 */
package bean;

public class Box {
	double length;
	double width;
	double height;
	public Box()
	{
		length=0;
		width=0;
		height=0;
	}
	public double getLength() {
		return length;
	}
	public void setLength(double length) {
		this.length = length;
	}
	public double getWidth() {
		return width;
	}
	public void setWidth(double width) {
		this.width = width;
	}
	public double getHeight() {
		return height;
	}
	public void setHeight(double height) {
		this.height = height;
	}
	
	public double getArea()
	{
		return length*width*2+length*height*2+width*height*2;
	}
	
	public double getVolum()
	{
		return length*width*height;
	}
}

<%@ page language="java" contentType="text/html; charset=gb2312" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>





	<% 
		bean.Box box=new bean.Box();
		box.setLength(40);
		box.setWidth(20);
		box.setHeight(30);
		request.setAttribute("box", box);
	%>
	盒子的表面积为:${box.area }

	
	盒子的容积为:${box[volum] }