/* * 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 volum() { return length*width*height; } public double surfaceArea() { return length*width*2+length*height*2+width*height*2; } }
<!-- jsp页面 --> <!-- 使用javaBean计算长方体的容积和表面积 --> <%@ page contentType="text/html; charset=gb2312" %> <%@ page import="bean.Box" %> <!-- Box是要导入的类名,bean是包含这个类文件的包名 --> <jsp:useBean id="box" class="bean.Box" scope="page" /> <!-- <jsp:useBean id="给javaBean实例取的名称" class="javaBean类名" scope="javaBean实例的有效范围" /> --> <html> <body> <% box.setLength(10); box.setWidth(11); box.setHeight(12); out.println("在JSP中使用javaBean<br>"); out.println("盒子的长度为:"+box.getLength()+"<br>"); out.println("盒子的宽度为:"+box.getWidth()+"<br>"); out.println("盒子的高度为:"+box.getHeight()+"<br>"); out.println("盒子的容积为:"+box.volum()+"<br>"); out.println("盒子的表面积为:"+box.surfaceArea()+"<br>"); %> </body> </html>
JSP代码还可以这样写:
<!-- jsp页面 --> <!-- 使用javaBean计算长方体的容积和表面积 --> <%@ page contentType="text/html; charset=gb2312" %> <%@ page import="bean.Box" %> <!-- Box是要导入的类名,bean是包含这个类文件的包名 --> <jsp:useBean id="box" class="bean.Box" scope="page" /> <!-- id="给javaBean实例取的名称" class="javaBean类名" scope="javaBean实例的有效范围" --> <jsp:setProperty property="length" name="box" value="10" /> <jsp:setProperty property="width" name="box" value="11" /> <jsp:setProperty property="height" name="box" value="12" /> <html> <body> 在JSP中使用javaBean<br> 盒子的长度为:<jsp:getProperty property="length" name="box"/><br> 盒子的宽度为:<jsp:getProperty property="width" name="box"/><br> 盒子的高度为:<jsp:getProperty property="height" name="box"/><br><br><br> <% out.println("盒子的容积为:"+box.volum()+"<br>"); out.println("盒子的表面积为:"+box.surfaceArea()+"<br>"); %> </body> </html>
也可以用HTML表单设置javaBean的属性值,代码如下:
<!-- 用HTML表单设置javaBean的属性值 --> <%@ page contentType="text/html; charset=gb2312" %> <%@ page import="bean.Box" %> <jsp:useBean id="box" class="bean.Box" scope="page" /> <jsp:setProperty property="*" name="box"/> <html> <head> <title>用HTML表单设置JavaBean的属性</title> </head> <body> <div align="center"> <center> <table border="1" width="66%"> <form name="form1" action="" method="post"> <tr> <td width="44%">请输入盒子的长:</td> <td width="56%"><input type="text" name="length" size="20"></td> </tr> <tr> <td width="44%">请输入盒子的宽:</td> <td width="56%"><input type="text" name="width" size="20"></td> </tr> <tr> <td width="44%">请输入盒子的高:</td> <td width="56%"><input type="text" name="height" size="20"></td> </tr> <tr> <td width="100%" colspan="2"> <p align="center"> <input type="submit" name="T1" size="20" value="提交" > <input type="reset" name="T1" size="20" value="重置" > </td> </tr> </form> <tr> <td width="44%">你输入的盒子的长是:</td> <td width="56%"><%=box.getLength() %></td> </tr> <tr> <td width="44%">你输入的盒子的宽是:</td> <td width="56%"><%=box.getWidth() %></td> </tr> <tr> <td width="44%">你输入的盒子的高是:</td> <td width="56%"><%=box.getHeight() %></td> </tr> <tr> <td width="44%">盒子的体积为:</td> <td width="56%"><%=box.volum() %></td> </tr> <tr> <td width="44%">盒子的表面积为:</td> <td width="56%"><%=box.surfaceArea() %></td> </tr> </table> </center> </div> </body> </html>
JSP简单练习-javaBean的简单应用,布布扣,bubuko.com
原文地址:http://blog.csdn.net/u012804490/article/details/38119219