commoditymanage.java

这是用java实现的一个仓储管理系统

import java.io.*;
import java.sql.*;
//---------------------------------------------Here's Commodity Detail---------------------------------------------//
class Commodity 
{
	static int n;
	static String ID;
	public void CommodityMenu()throws IOException
	{
		System.out.println("        |--------Commodity Menu--------|");
		System.out.println("           1.Display Commodity Detail");
		System.out.println("           2.Insert  Commodity Detail");
		System.out.println("           3.Update  Commodity Detail");
		System.out.println("           4.Delete  Commodity Detail");
		System.out.println("                      0.Exit");
		System.out.println("        |------------------------------|");
		System.out.print("        Please choose a number(0~4):");
		Commodity c=new Commodity();
		c.choose();
	}
	
	public void again()throws IOException
	{
		System.out.println("Return to Main Menu ?");
		System.out.print("Press '10' for Yes,Press '20' for No! ");
		BufferedReader ar=new BufferedReader(new InputStreamReader(System.in));
		String d=ar.readLine();
		int m=Integer.parseInt(d);
		Commodity c=new Commodity();
		CommodityManage CM=new CommodityManage();
		if(m==10)
		{
			c.CommodityMenu();
			c.choose();
		}
		else if(m==20)
		{
			System.out.println("You have exited the Main Menu!");
			System.exit(0);
		}
		else	
		{
			System.out.println("Please Enter again!");
			c.again();
		}		
		
	}
	
	public void choose()throws IOException
	{
	  BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String w=br.readLine();
		n=Integer.parseInt(w);
		Commodity c=new Commodity();
		CommodityManage CM=new CommodityManage();
		{
			switch(n)
			{
				case 1:	c.DisplayCommodity();	c.again();	break;
				case 2:	c.InsertCommodity() ;	c.again();	break;
				case 3:	c.UpdateCommodity() ;	c.again();	break;
				case 4:	c.DeleteCommodity() ;	c.again();	break;
				case 0:	System.out.println("-------------You have returned to the Main Menu!-------------");
								CM.DisplayMenu();
								CM.chooseMenu();	
								break;
				default:
								System.out.println("Please Enter again:");	c.choose();	break;	
			}
		}			
	}
	public void DisplayCommodity()  
	{
		System.out.println("-----------------1.DisplayCommodity--------------------");
		Connection con=null;
		Statement stat;
		ResultSet res;
    try
    {
	    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
	    con=DriverManager.getConnection("jdbc:odbc:Commodity");
	    stat=con.createStatement();
	    res=stat.executeQuery("select * from CommodityDetail");
	    while(res.next())
	    {
		    	System.out.println("  Commodity ID : "+res.getString(1));
	      	System.out.println("   Supplier ID : "+res.getString(2));
	     	 	System.out.println("Commodity Name : "+res.getString(3));	 
	      	System.out.println("Commodity Type : "+res.getString(4));	 
					System.out.println("      Quantity : "+res.getString(5));	 
	      	System.out.println("Thresold Value : "+res.getString(6));	
	      	System.out.println("    Store Date : "+res.getString(7));	 
	      	System.out.println("     Need Flag : "+res.getString(8));	 
	      	System.out.println("    Order Flag : "+res.getString(9));	 	      
	      	System.out.println("\n-------------------Commodity Detail------------------\n");
	    }
     }
     catch(Exception e)
     {
	    	System.out.println("Could not query: "+e);
     }
		 if (con!=null) con=null;
	}
	
	public void Display()  
	{
			Connection con=null;
	    PreparedStatement stat;
	    ResultSet res=null;
	    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      try
      {
		    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
		    con=DriverManager.getConnection("jdbc:odbc:Commodity");
		    stat=con.prepareStatement("select * from CommodityDetail where cCommodityID=?");
		    stat.setString(1,(String)ID);  
		    res=stat.executeQuery();  
		    while(res.next())
		    {
		    	System.out.println("  Commodity ID : "+res.getString(1));
	      	System.out.println("   Supplier ID : "+res.getString(2));
	     	 	System.out.println("Commodity Name : "+res.getString(3));	 
	      	System.out.println("Commodity Type : "+res.getString(4));	 
					System.out.println("      Quantity : "+res.getString(5));	 
	      	System.out.println("Thresold Value : "+res.getString(6));	
	      	System.out.println("    Store Date : "+res.getString(7));	 
	      	System.out.println("     Need Flag : "+res.getString(8));	 
	      	System.out.println("    Order Flag : "+res.getString(9));	 	      
	      	System.out.println("\n-------------------Commodity Detail------------------\n");
		    }
     }
     catch(Exception e)
     {
	    	System.out.println("Could not display: "+e);
     }
		 if (con!=null) con=null;
	}
	
	public void InsertCommodity()throws IOException  
	{
			System.out.println("-----------------2.InsertCommodity--------------------");
			Connection con=null;
	    PreparedStatement stat=null;
	    int res=0;

	    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	    try
	    {
	        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
	        con=DriverManager.getConnection("jdbc:odbc:Commodity");
	        stat=con.prepareStatement("insert into CommodityDetail(cCommodityID,cSupplierID,vCommodityName,vCommodityType,iCommodityQty,iCommodityThreshold) values(?,?,?,?,?,?)");

	        System.out.print("cCommodityID(6) = ");
	        String cCommodityID=br.readLine();   //从键盘读入值存入字串变量中
	        ID=cCommodityID;

					System.out.print("cSupplierID(6) = ");
					String cSupplierID=br.readLine();
					
	        System.out.print("vCommodityName(50) = ");
	        String vCommodityName=br.readLine();

	        System.out.print("vCommodityType(20) = ");
	        String vCommodityType=br.readLine();

	        System.out.print("iCommodityQty(int) = ");
	        String iCommodityQty=br.readLine();
	        
					System.out.print("iCommodityThreshold(int) = ");
	        String iCommodityThreshold=br.readLine();

					System.out.println(" ");
					
	        stat.setString(1,cCommodityID);  //用值替换SQL语句中的问号参数
	        stat.setString(2,cSupplierID);
	        stat.setString(3,vCommodityName);
	        stat.setString(4,vCommodityType);
          stat.setInt(5,Integer.parseInt(iCommodityQty));
          stat.setInt(6,Integer.parseInt(iCommodityThreshold));
          
	        res=stat.executeUpdate();
	        if (res!=0) System.out.println("-------Your details have been registered-------");
	    }

	    catch(Exception ex)
      {      
     	   System.out.println("Error registe: "+ex);
      }

			 if (con!=null) con=null;
			 Log l=new Log();
			 l.GetDate();
			 FileWriter outF = new FileWriter("log.txt",true);
			 outF.write("              Inserted a commodity \r\n");
			 outF.write("-----------------------------------------------------\r\n");
			 outF.close();
			 System.out.println(" ");
			 System.out.println("-------------Insert Detail-------------------");
			 Commodity c=new Commodity();
			 c.Display();
	}
	
	public void UpdateCommodity()throws IOException 
	{
      System.out.println("-----------------3.UpdateCommodity--------------------");
      Connection con=null;
	    PreparedStatement stat=null;
	    int res=0;
	    
	    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	    try
	    {
	        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
	        con=DriverManager.getConnection("jdbc:odbc:Commodity");
	        System.out.print("Please enter the cCommodityID(6):");
	        String cCommodityID=br.readLine();
	        ID=cCommodityID;
	        System.out.println();
	        System.out.println("Update what?");

	       	System.out.println("1.Commodity ID");
	      	System.out.println("2.Supplier ID");
	     	 	System.out.println("3.Commodity Name");	 
	      	System.out.println("4.Commodity Type");	 
					System.out.println("5.Quantity ");	 
	      	System.out.println("6.Thresold Value");		  
	      	System.out.print("-------Please choose(1-5):");    
					String w=br.readLine();
					int n=Integer.parseInt(w);
					switch(n)
					{
						case 1:	stat=con.prepareStatement("update CommodityDetail set cCommodityID=? where cCommodityID=?");
										System.out.print("Enter the new cCommodityID(6) : ");break;
						case 2:	stat=con.prepareStatement("update CommodityDetail set cSupplierID=? where cCommodityID=?");
										System.out.print("Enter the new cSupplierID(6) : ");break;
						case 3:	stat=con.prepareStatement("update CommodityDetail set vCommodityName=? where cCommodityID=?");
										System.out.print("Enter the new vCommodityName(50) : ");break;
						case 4:	stat=con.prepareStatement("update CommodityDetail set vCommodityType=? where cCommodityID=?");
										System.out.print("Enter the new vCommodityType(20) : ");break;
						case 5:	stat=con.prepareStatement("update CommodityDetail set iCommodityQty=? where cCommodityID=?");
										System.out.print("Enter the new iCommodityQty(int) : ");break;
						case 6: stat=con.prepareStatement("update CommodityDetail set iCommodityThoreshold=? where cCommodityID=?");
										System.out.print("Enter the new iCommodityThoreshold(int) : ");break;
						default:break;
					}
	        
	        String newdata=br.readLine();
	        if(n>4)
	        {
	        	stat.setInt(1,Integer.parseInt(newdata));
	        }
	        else stat.setString(1,(String)newdata); 
	        stat.setString(2,(String)cCommodityID); 
	        
					res=stat.executeUpdate();
	        if (res!=0) System.out.println("-------Your details have been updata-------");
	    }

      catch(Exception e)
      {
	    System.out.println("Could not Updata: "+e);
      }
      if (con!=null)con=null;
      Log l=new Log();
		  l.GetDate();
		  FileWriter outF = new FileWriter("log.txt",true);
		  outF.write("            Updated table commodity detail \r\n");
		  outF.write("-----------------------------------------------------\r\n");
		  outF.close();
      Commodity c=new Commodity();
      System.out.println("--------------Update Detail-------------------");
      c.Display();
	}
	public void DeleteCommodity()throws IOException
	{
			System.out.println("-----------------4.DeleteCommodity--------------------");
			Connection con=null;
	    PreparedStatement stat=null;
	    int res=0;

	    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	    try
	    {
	        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
	        con=DriverManager.getConnection("jdbc:odbc:Commodity");
	        stat=con.prepareStatement("delete CommodityDetail where cCommodityID=?");

	        System.out.print("Enter cCommodityID(6):");
	        String cCommodityID=br.readLine();   //从键盘读入值存入字串变量中

	        stat.setString(1,cCommodityID);  //用值替换SQL语句中的问号参数
	    
	        res=stat.executeUpdate();
	        if (res!=0) System.out.println("-------Your details have been registered-------");
	    }

	    catch(Exception ex)
      {      
     	   System.out.println("Could not Delete: "+ex);
      }
	    if (con!=null) con=null;
	    Log l=new Log();
			l.GetDate();
			FileWriter outF = new FileWriter("log.txt",true);
			outF.write("               Deleted a commodity \r\n");
			outF.write("-----------------------------------------------------\r\n");
			outF.close();
	    Commodity c=new Commodity();
	    System.out.println(" ");
	    System.out.println("----------The Detail that after delete----------");
	    c.DisplayCommodity();

	}
	public static void main(String args[])throws IOException
	{
			Commodity c=new Commodity();
			c.CommodityMenu();
	}
}
//-----------------------------------------------------------------------------------------------------------------//

//---------------------------------------------Here's Supplier Detail----------------------------------------------//
class Supplier
{
	static int n;
	static String ID;
	public void SupplierMenu()throws IOException
	{