利用Javabean+JSP去实现商品进销存中任何一个场景，实现对商品数量的绑定。

先引入几个需要的jar包

add.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="mybean.Goods"  %>

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>








	
	    
	
	




    
	
    

       
商品一览表
        

      
       

              
商品类型
              
单价
              
添加入库/数量
         
       	

          
衣服
          
￥200
          

      
      	

              
裤子
            
￥168
            
 
       
       		

              
鞋子
            
￥99
            

       
     	

              
帽子
            
￥69
            

       
       

             
            
  
       
        
    	
     
      
    

pay.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="mybean.Goods"  %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>


  
    
    
	
	
	    
	
		
  
  
    
	
	<%
		String Count;
		Count=request.getParameter("Clothes");
		int C = Integer.parseInt(Count); 
		buy.setClothes(C);
		//衣服数量
		Count=request.getParameter("Trouers");
		int T = Integer.parseInt(Count); 
		buy.setTrouers(T);
		//裤子数量
		Count=request.getParameter("Shoes");
		int S = Integer.parseInt(Count); 
		buy.setShoes(S);
		//鞋子数量
		Count=request.getParameter("Cap");
		int Cap = Integer.parseInt(Count); 
		buy.setCap(Cap);
		//鞋子数量
	%> 
	
商品统计表
	

    	 

              
商品类型
              
单价/元
              
商品数量统计/件
         
         

         		 
衣服
        		  
￥200
        		  
<%=buy.Clothes()%>
     	 
      	

              
裤子
            
￥168
            
<%=buy.Trouers()%>
       
       		  

              
鞋子
              
￥99
              
<%=buy.Shoes()%>
       
     	

              
帽子
             
￥69
              
<%=buy.Cap()%>
       
       

       
金额总计/元
       
 <%=buy.Sum() %>/元
       
        
  

javaBean（Goods.java)

package mybean;
public class Goods{
	//衣服、鞋子、裤子、和帽子商品
    private int Clothes=0;
    private int Shoes=0;
    private int Trouers=0;
    private int Cap=0;
    private String Notice;
    private int sum;
    public int getClothes() {
		return Clothes;
	}
	public void setClothes(int Clothes) {
		this.Clothes = Clothes;
	}
	//衣服
	public int getShoes() {
		return Shoes;
	}
	public void setShoes(int Shoes) {
		this.Shoes= Shoes;
	}
	
	//鞋子
	public int getTrouers() {
		return Trouers;
	}
	public void setTrouers(int Trouers) {
		this.Trouers = Trouers;
	}
	//帽子
	public int getCap() {
		return Cap;
	}
	public void setCap(int Cap) {
		this.Cap = Cap;
	}

	public String Clothes(){
		 Notice="";
		Notice+=getClothes();
		return Notice;
	}
	public String Trouers(){
		 Notice="";
		Notice+=getTrouers();
		return Notice;
	}
	public String Shoes(){
		 Notice="";
		Notice+=getShoes();
		return Notice;
	}
	public String Cap(){
		 Notice="";
		Notice+=getCap();
		return Notice;
	}
	public int Sum(){
		sum=0;
		sum+=getClothes()*200;
		sum+=getTrouers()*168;
		sum+=getShoes()*99;
		sum+=getCap()*69;
		return sum;
	}
}

效果图：