salesystempanel.java

该程序可实现的功能：向系统添加商品项目（可无限添加）、依据商品条码查询商品详细情况、出售商品

package saleSystem;


import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;

import javax.swing.JButton;
//import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class SaleSystemPanel extends JPanel{
	private static double totalPrice=0.0;       //定义应付总金额变量
	int n=5;
    /*Product [] products=new Product[n];{
    for (int i = 0; i < products.length; i++) 
	{
		products[i]=new Product();}
    }*/
	ArrayList<Product> products=new ArrayList<Product>();//用一个数组列表装商品对象，以此来动态添加商品项目
	private JLabel codeBarLabel=new JLabel("商品条码");
	private JLabel nameLabel=new JLabel("商品名称");
	private JLabel priceLabel=new JLabel("商品价格");
	private JLabel manufacturerLabel=new JLabel("商品厂家");
	//private JLabel manufacturerLabel=new JLabel("商品厂家");
	private JLabel totalPriceLabel=new JLabel("购买总额(元)");
	private JLabel encourageLabel=new JLabel("奖励金额（元）");
	private JLabel shouldPayLabel=new JLabel("应付（元）");
	private JLabel payLabel=new JLabel("实付（元）");
	private JLabel chargeLabel=new JLabel("找零");
	private JTextField codeBarText=new JTextField();//显示商品条码的文本区
	private JTextField nameText=new JTextField();//显示商品名称的文本区
	private JTextField priceText=new JTextField();//显示商品价格的文本区
	private JTextField manufacturerText=new JTextField();//显示商品厂家的文本区
	private JTextField totalPriceText=new JTextField("0.0");//显示购买总费用的文本区
	private JTextField encouragePriceText=new JTextField("0.0");//显示奖励金额的文本区
	private JTextField shoulePayText=new JTextField("0.0");//显示购买总费用的文本区
	private JTextField PayText=new JTextField("0.0");//显示客户支付现金的文本区
	private JTextField chargeText=new JTextField("0.0");//显示找零的文本区
    private JButton addButton=new JButton("添加");
    private JButton clear1Button=new JButton("清空1");
    private JButton clear2Button=new JButton("清空2");
    private JButton productButton=new JButton("商品详细说明");
    //private JButton totalPriceButton=new JButton("计算商品总额");
    private JButton totalPriceButton=new JButton("总金额计算");
    private JButton encouragePriceButton=new JButton("奖励金额计算");
    private JButton shouldPayButton=new JButton("应付金额计算");
    private JButton computeButton=new JButton("找零金额计算");
    
    //add(new SaleSystemPanel1,BorderLayout.NORTH);
    public SaleSystemPanel()//将各面板加入总面板中
    {
    	add(new SaleSystemPanel1(),BorderLayout.NORTH);
        add(new SaleSystemCentered(),BorderLayout.CENTER);
        add(new SaleSystemPanel4(),BorderLayout.SOUTH);
        
    }
    //SaleSystemPanel1 panel1=new SaleSystemPanel1();
    //add(panel1,BorderLayou.NORTH);
    
    
    private class SaleSystemPanel1 extends JPanel{  //私有类SaleSystemPanel1,此面板中添加显示商品属性的组件
    	
        
    	public SaleSystemPanel1(){
    		setLayout(new GridLayout(3,4));
    		add(codeBarLabel);
    		add(codeBarText);
    		add(nameLabel);
    		add(nameText);
    		add(priceLabel);
    		add(priceText);
    		add(manufacturerLabel);
    		add(manufacturerText);
    		add(addButton);
    		add(clear1Button);
    		add(productButton);
    		clear1Button.addActionListener(new ActionListener()//点击"清空"时，所有文本区的内容为空
    		{
    			public void actionPerformed(ActionEvent e)
    			{
    				codeBarText.setText("");
    				nameText.setText("");
    				priceText.setText("");
    				manufacturerText.setText("");
    				//totalPriceText.setText("");
    				//PayText.setText("");
    				//chargeText.setText("");
    			}
    		});
    		/*addActionListener(new ActionListener()
    		{
    			public void actionPerformed(ActionEvent event)
    			{
    				
    			}
    		});*/
    		//for( i=0;i<products.length;i++) //throws ArrayIndexOutOfBoundsException
    				//{
    		//while(i<products.length){
    					addButton.addActionListener(new ActionListener()//点击”添加“按钮时，添加商品项目（商品数可以无限添加）
    					{
    						//int i=products.length;
    						public void actionPerformed(ActionEvent e)
    						{
    							//String buttonStr=(String)e.getSource();
    							//addButton.setLabel("添加下一个?");
    							String codeBar=codeBarText.getText();//获得商品的条码
            					String name=nameText.getText();//获得商品的名称
            					double price=Double.parseDouble(priceText.getText());//获得商品的价格
            					String manufacturer=manufacturerText.getText();//获得商品厂家
            					Product aProduct=new Product();
            					//products[products.length].setProduct(name, codeBar, price, manufacturer);
            					products.add(aProduct);
            					aProduct.setProduct(name, codeBar, price, manufacturer);//设置商品对象
            					//i++;
    						}
    						//i=i+1;
    					});
    				//}
    		productButton.addActionListener(new ActionListener()//试用方法：先输入了条码再按按钮……
    		{                                                   //给”商品详细说明“按钮添加事件监听器，按该按钮时，根据所输入的条码，对应的文本区中将显示商品属性
    			public void actionPerformed(ActionEvent e)
    			{
    				//int i=products.size();
    				String cBar=codeBarText.getText();
    				for(int i=0;i<products.size();i++)
    				{
    					Product p=products.get(i);
    					if(p.getProductCodeBar().equals(cBar))
    					{
                            nameText.setText(p.getProductName());
    						
    						String pr=Double.toString(p.getProductPrice());
    						priceText.setText(pr);
    						manufacturerText.setText(p.getProductManufacturer());
    						break;
    					}
    					/*if(products[i].getProductCodeBar().equals(cBar))
    					{
    						nameText.setText(p.getProductName());
    						
    						String pr=Double.toString(p.getProductPrice());
    						priceText.setText(pr);
    						manufacturerText.setText(p.getProductManufacturer());
    						break;
    					}*/
    				}
    			}
    		});
      }
    	//private int i=0;
}
    private class SaleSystemCentered extends JPanel{//私有类SaleSystemCentered，此类中有一面板，其中包含两个面板
    	public SaleSystemCentered()
    	{
    		add(new SaleSystemPanel2(),BorderLayout.WEST);
    		add(new SaleSystemPanel3(),BorderLayout.EAST);
    	}
    	private class SaleSystemPanel2 extends JPanel{//私有类SaleSystemPanel2，此类中有一面板，其中添加显示付款情况的组件
    		public SaleSystemPanel2()
    		{
    			setLayout(new GridLayout(5,2));
    			//add(totalPriceLabel);
    			//add(totalPriceText);
    			add(totalPriceLabel);
    			add(totalPriceText);
    			add(encourageLabel);
    			add(encouragePriceText);
    			add(shouldPayLabel);
    			add(shoulePayText);
    			add(payLabel);
    			add(PayText);
    			add(chargeLabel);
    			add(chargeText);
    			
    		}
    		
    	}
    	private class SaleSystemPanel3 extends JPanel{//私有类SaleSystemPanel3，此类中有一面板，其中添加一个”金额计算"的按钮，点击该按钮时，
    		//double totalPrice=0.0;                                        //“找零”文本区中将显示所应给客户找还的金额
    		public SaleSystemPanel3()
    		{
    			setLayout(new GridLayout(5,1));
    			add(totalPriceButton);
    			add(encouragePriceButton);
    			add(shouldPayButton);
    			add(computeButton);
    			add(clear2Button);
    			
    			totalPriceButton.addActionListener(new ActionListener()
    			{
    				public void actionPerformed(ActionEvent e)
    				{
    					//double totalPrice=0.0;
    					double price=Double.parseDouble(priceText.getText());
    					totalPrice+=price;
    					//totalPriceText.setText(Double.toString(price));
    					//double tPrice=Double.parseDouble(totalPriceText.getText());
    					//totalPrice=tPrice;
    					//totalPrice+=tPrice;
    					//doublerealTotle
    					totalPriceText.setText(""+totalPrice);
    				}
    			
    			});
    			encouragePriceButton.addActionListener(new ActionListener()
    			{
    				public void actionPerformed(ActionEvent e)
    				{
    					String ePrice=totalPriceText.getText();
    					double enPrice=Double.parseDouble(ePrice);
    					double encouragePrice=enPrice*0.10;
    					String price=Double.toString(encouragePrice);
    					encouragePriceText.setText(price);
    				}
    			});
    			shouldPayButton.addActionListener(new ActionListener()
    			{
    				public void actionPerformed(ActionEvent e)
    				{
    					double tPrice=Double.parseDouble(totalPriceText.getText());
    					double ePrice=Double.parseDouble(encouragePriceText.getText());
    					shoulePayText.setText(Double.toString(tPrice-ePrice));
    				}
    			
    			});
    			computeButton.addActionListener(new ActionListener()
    			{
    				public void actionPerformed(ActionEvent e)
    				{
    					//double tPrice=Double.parseDouble(totalPriceText.getText());
    					//double ePrice=Double.parseDouble(encouragePriceText.getText());
    					//shoulePayText.setText(Double.toString(tPrice-ePrice));
    					double pay=Double.parseDouble(PayText.getText());
    					//double price=Double.parseDouble(priceText.getText());
    					double charge=pay-(Double.parseDouble(shoulePayText.getText()));
    					String ch=Double.toString(charge);
    					//ch.toString(charge);
    					chargeText.setText(ch);
    					//double singlePrice=Double.parseDouble(priceText.getText());
    				}
    			});
    			clear2Button.addActionListener(new ActionListener()
    			{
    				public void actionPerformed(ActionEvent e)
    				{
    					totalPriceText.setText("0.0");
    					encouragePriceText.setText("0.0");
    					shoulePayText.setText("0.0");
    					PayText.setText("0.0");
    					chargeText.setText("0.0");
    					totalPrice=0.0;
    				}
    			});
    		}
    		
    	}
    }
    private class SaleSystemPanel4 extends JPanel{ //暂未实现
    	public SaleSystemPanel4()
    	{
    		this.setBackground(Color.yellow);
    		JLabel welcomLabel=new JLabel("欢迎使用本系统！");
    		add(welcomLabel);
    	}
    	
    }
}