JSP簡單練習-EL表示式操作JavaBean
阿新 • • 發佈：2018-12-23
/* * javaBean程式碼 */ 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; } }
<!-- useBox.jsp檔案 --> <%@ page language="java" contentType="text/html; charset=gb2312" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <head> <title>用EL使用JavaBean</title> </head> <body> <% bean.Box box=new bean.Box(); box.setLength(40); box.setWidth(20); box.setHeight(30); request.setAttribute("box", box); %> 盒子的表面積為:${box.area }<br> <c:set var="volum" value="volum" /> 盒子的容積為:${box[volum] }<br> </body> </html>
