supersystem.java

Blue Java写的Java超市管理系统（Kent大学的Java学习）

import java.util.*;
import java.io.*;
public class SuperSystem
{
private String proName=null;
private int quantity=0;
private double Aprice=0.00;
private double Jprice=0.00;
private double Zprice=0.00;
private int number=0;
private String numberStr="0000";
private int n=0;
private int m=0;
Date da=new Date();
String[][] strArray=new String[100][4];
public static void main(String[] args)
{
  SuperSystem ss = new SuperSystem();
  boolean tag=true;
  boolean tag1=true;
     boolean tag2=true;
  try
  {
   InputStreamReader isr=new InputStreamReader(System.in);
   BufferedReader br=new BufferedReader(isr);
   String strLine;
   while(tag)
   { 
       if(tag1==true)
       {
         System.out.println("");
         System.out.println("            欢迎使用Ayaya超市收银系统      ");
         System.out.println("");
       } 
       if(tag2==true)
       {
         
         System.out.print("购物请输入'1'  退出系统请输入'exit' : ");
         strLine=br.readLine();
         tag1=false;
       }
       else
       {
         System.out.print("继续请输入'5'  结帐请输入'9'  退出系统请输入'exit' : ");
         strLine=br.readLine();
       }
       
       if(strLine.equals("exit"))
       {
        System.out.println("");
        System.out.println("            谢谢使用再见!    ");
        System.out.println("");
        break;
       }
       else if(strLine.equals("9"))
       {
        ss.prints();
        tag1=true;
        tag2=true;
        continue;
       }else if(strLine.equals("5")||strLine.equals("1"))
       {
        
        tag2=false;
        boolean tag3=true;
        while(tag3)
        {   
             //System.out.print("请输入品名: ");
         String name=ss.getReadLine(1,br);
         //String name=br.readLine();
         if(ss.cheak(1,name))
         {   
            // ss.setProName(name);
          boolean tag4=true;
          while(tag4)
          {
           
           //System.out.print("数量: ");
           String quanStr=ss.getReadLine(2,br); 
           //String quanStr=br.readLine();
           if(ss.cheak(2,quanStr))
           { 
              //ss.setQuantity(quanStr);
              //System.out.println(ss.cheak(2,quanStr));
               boolean tag5=true;
                  while(tag5)
                  {
             //System.out.print("单价: ");
             String apriStr=ss.getReadLine(3,br);
             //String apriStr=br.readLine();
             if(ss.cheak(3,apriStr))
             {   
                 ss.setProName(name);
                 ss.setQuantity(quanStr);
              ss.setAprice(apriStr);
              int quan=ss.getQuantity();
              double apri=ss.getAprice();
              ss.setJprice(quan,apri);
              ss.put(ss.getProName(),quan,apri,ss.getJprice());
              tag5=false;
              tag4=false;
              tag3=false;
             }
            }
           }
          }
         }
        }
      }
       
   }
   br.close();
     }
     catch(IOException e)
     {
         
     } 
}
public SuperSystem()
{
  
}
public void put(String proName,int quantity,double Aprice,double Jprice)
{
  for(int i=n;i<n+1;i++)
  {
   for(int j=0;j<4;j++)
   {
    if(j==0)
    {
      strArray[j]=proName;
    }
    else if(j==1)
    {
      strArray[j]=String.valueOf(quantity);
      
    }
    else if(j==2)
    {
     strArray[j]=String.valueOf(Aprice);
    }
    else if(j==3)
    {
     strArray[j]=String.valueOf(Jprice);
     Zprice+=Jprice;
    }
        }
  
  }
   n+=1;
   m+=1;
}
public void prints()
{
    System.out.println("");
    System.out.println("         欢迎光临Ayaya        ");
    System.out.println("天天新货*流行无国界*时尚零时差");
    System.out.println("三日内如有质量问题可凭小票更换!");
    System.out.println("===============================");
    System.out.println("收据号:0000#"+getReceiptNumber()+" 收款:03");
    System.out.println("日期: "+getDataStr()+"  时间:"+getTimeStr());
    System.out.println("--------------------------------");
    getTitle();
  for(int i=0;i<m;i++)
  {
   for(int j=0;j<4;j++)
   {
    if(j==0)
    {
       System.out.print(strArray[j]+"     ");
       strArray[j]=null; 
    }
    else if(j==1)
    {
      System.out.print(strArray[j]+"   "); 
      strArray[j]=null;
    }
    else if(j==2)
    {
     String aprec=strArray[j];
     strArray[j]=null;
     if(aprec.length()!=4)
     {
      System.out.print(aprec+"0      ");
     }else
     {
      System.out.print(aprec+"      "); 
     }
      
    }
    else if(j==3)
    {
     
     if(strArray[j].length()!=4)
     {
      System.out.print(strArray[j]+"0");
      strArray[j]=null; 
     }else
     {
      System.out.print(strArray[j]);
      strArray[j]=null;
     }
      
    }
   
   }
   
   System.out.println("");
  }
    System.out.println("-------------------------------");
    System.out.println("       现金     "+Zprice);
    System.out.println("===============================");
    System.out.println("如收银员不打小票给您或账款不符请");
    System.out.println("致电2576339获88元商品地址火炬路");
    System.out.println("");
    System.out.println("");
    System.out.println("");
    System.out.println("");
    System.out.println("");
    m=0;
    n=0;
}
public String getDataStr()
{
  String DataStr=da.toLocaleString().substring(0,9);
  return DataStr;
}
public String getTimeStr()
{
  String TimeStr;
  try
  {
    TimeStr=da.toLocaleString().substring(9,18);
     }
     catch(Exception e)
     {
       TimeStr=da.toLocaleString().substring(9,17);
     }
  return TimeStr;
}
public void getTitle()
{
String[] strTitle=new String[4];
strTitle[0]="品名";
strTitle[1]="数量";
strTitle[2]="单价";
strTitle[3]="金额";
for(int i=0;i<4;i++)
{
         if(i==0)
    {
      System.out.print(strTitle+"       ");
    }
    else if(i==1)
    {
         System.out.print(strTitle+"  "); 
      
    }
    else if(i==2)
    {
          System.out.print(strTitle+"    ");
    }
    else if(i==3)
    {
        System.out.print(strTitle);
    }

}
System.out.println("");
}
public String getProName()
{
  return this.proName;
}
public void setProName(String proName)
{
     this.proName=proName;
}

public int getQuantity()
{
  return this.quantity;
}
public void setQuantity(String quantity)
{
  this.quantity=Integer.parseInt(quantity);
}

public double getAprice()
{
  return this.Aprice;
}
public void setAprice(String aprice)
{
  this.Aprice=Double.parseDouble(aprice);
}

public double getJprice()
{
  return this.Jprice;
}
public void setJprice(int quantity,double aprice)
{
  
  this.Jprice=(quantity*aprice);
}
public boolean cheak(int int1,String str)
{
  
  boolean che=false;
  if(int1==1)
  {
     int n1=str.length();
     if(str==null||n1<=0||n1>20)
     {
       System.out.println("商品名不能为空或者不能超过20个字符!");
       che=false;
     }
     else
     {
    che=true;
   
     } 
  }
  else if(int1==2)
  {
     int n1=str.length();
     if(str==null||n1<=0||n1>20)
     {
       System.out.println("商品数量不能为空或者不能超过20位数字!");
       che=false;
     }
     else
     {
       try
       {
        int n2=Integer.parseInt(str);
        che=true;
       }
       catch(Exception e)
       {
        System.out.println("您输入的商品数量不是数字,请重新输入!");
        che=false;
       }

     }  
  }
  else if(int1==3)
  {
   int n1=str.length();
     if(str==null||n1<=0||n1>20)
     {
       System.out.println("商品单价不能为空或者不能超过20位数字!");
       che=false;
     }
     else
     {
       try
       {
        double n2=Double.parseDouble(str);
        che=true;
       }
       catch(Exception e)
       {
        System.out.println("您输入的商品单价不是货币值,请重新输入!");
        che=false;
       }

     }  
  }
  return che;
}
public String getReadLine(int int2,BufferedReader br)
{ 
    String str=null;
    if(int2==1)
    {
     System.out.print("请输入品名: ");
       }
       else if(int2==2)
       {
           System.out.print("数量: ");
    
       }
       else if(int2==3)
       {
     System.out.print("单价: ");
       }
       try
  {

    str=br.readLine();
  }
  catch(IOException e)
  {} 
    return str;
}
   public String getReceiptNumber()
{
  int n1=Integer.parseInt(numberStr);
     if(n1>=0 && n1<9)
      {
       n1+=1;
       numberStr="000"+n1;
      }
      else if(n1>=9 && n1<99)
      {
       n1+=1;
       numberStr="00"+n1;
      }
      else if(n1>=99 && n1<999)
      {
       n1+=1;
       numberStr="0"+n1;
      }
      else if(n1>=999 && n1<9999)
      {
       n1+=1;
       numberStr=String.valueOf(n1);
      }
      
    return numberStr;
    
}
}