Simple JSP exercises-simple application of javaBean

Simple JSP exercises-simple application of javaBean

/** JavaBean Code */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 ;}}

 
 <% @ Page contentType = "text/html; charset = gb2312" %> <% @ page import = "bean. Box" %>
 
 
 <% Box. setLength (10); box. setWidth (11); box. setHeight (12); out. println ("Use javaBean in JSP
"); Out. println (" the length of the box is: "+ box. getLength () +"
"); Out. println (" the box width is: "+ box. getWidth () +"
"); Out. println (" the height of the box is: "+ box. getHeight () +"
"); Out. println (" the volume of the box is: "+ box. volum () +"
"); Out. println (" the surface area of the box is: "+ box. surfaceArea () +"
"); %>

JSP code can also be written as follows:

 
 <% @ Page contentType = "text/html; charset = gb2312" %> <% @ page import = "bean. Box" %>
 
 
 
 
 
 Use javaBean in JSP
The length of the box is:
 
The box width is:
 
The height of the box is:
 


<% Out. println ("box volume:" + box. volum () +"
"); Out. println (" the surface area of the box is: "+ box. surfaceArea () +"
"); %>

You can also use an HTML form to set the attribute value of javaBean. The Code is as follows:

 <% @ Page contentType = "text/html; charset = gb2312" %> <% @ page import = "bean. Box" %>
 
 Set attributes of JavaBean using HTML Forms      
       
  
 
                  
   
  
 
   
 
    
The length of the box you entered is:
 
    
<% = Box. getLength () %>
 
   
 
   
 
    
The width of the box you entered is:
 
    
<% = Box. getWidth () %>
 
   
 
   
 
    
The height of the box you entered is:
 
    
<% = Box. getHeight () %>
 
   
 
   
 
    
The volume of the box is:
 
    
<% = Box. volum () %>
 
   
 
   
 
    
The surface area of the box is:
 
    
<% = Box. surfaceArea () %>