pimmanager.java

信息管理系统

import java.io.*;
import java.util.*;
import java.text.*;


public class PIMManager
{
	private static boolean ok = true;
	private static String list   = new String("List");
	private static String create = "Create";
	private static String save   = "Save";
	private static String load   = "Load";
	private static String quit   = "Quit";
	private static String cmd    = new String();         //store the command 
	private static String cType  = new String();         //store the create type
	private static ArrayList PIMItem = new ArrayList();  //store the item

	public static void saveItem() throws IOException
	{
		System.out.println("Saving file ...");
		ObjectOutputStream output = new ObjectOutputStream(new FileOutputStream("PIM.sav"));
		output.writeObject(PIMItem);
		output.close();
 		System.out.println("Done");
		
	}
	
	public static void loadItem() throws IOException,ClassNotFoundException
	{
	    System.out.println("Loading file ...");
		ObjectInputStream input = new ObjectInputStream(new FileInputStream("PIM.sav"));
	    PIMItem = (ArrayList)input.readObject();
		input.close();
		System.out.println("Done"); 
	}
	
	public static void main(String args[]) throws Exception
    {
    	System.out.print("Welcome to PIM.\n");
        while(ok)
        {
        	System.out.println("---Enter a command (supported commands are List Create Save Load Quit)---");
        	try
        	{
        		BufferedReader enter = new BufferedReader(new InputStreamReader(System.in));
        		cmd = enter.readLine();
        	}
        	catch(IOException e)
        	{}
        	int index = cmd.length();
        	if(index == 0)
        	{
        		System.out.println("Unknown command:" + cmd); //if press enter key
        		continue;
        	}
            else if(index<5&&list.substring(0,index).equalsIgnoreCase(cmd))
        	{
        		System.out.println("There are " + PIMItem.size() +" items.");
        		for(int i = 1;i < PIMItem.size()+1; i++)
        		{
        			System.out.println("Item "+ i +":" + PIMItem.get(i-1).toString());
        		}
        	}
        	else if(index<7&&create.substring(0,index).equalsIgnoreCase(cmd))
        	{
        		while(ok)
        		{
        			System.out.println("Enter an item type (todo, note, contact or appointment)");
        			try
        			{
        				BufferedReader Enter = new BufferedReader(new InputStreamReader(System.in));
        				cType = Enter.readLine();
        			}
        			catch(IOException e)
        			{}
        			int Tlong = cType.length();
        			
        			if(Tlong<5&&"todo".substring(0,Tlong).equalsIgnoreCase(cType))
        			{
        				PIMTodo todo = new PIMTodo();
        				todo.managerTodo();
        			    PIMItem.add(todo);
        				break;
        			}
        			else if(Tlong<5&&"note".substring(0,Tlong).equalsIgnoreCase(cType))
        			{
        				PIMNote note = new PIMNote();
                        note.managerNote();
                        PIMItem.add(note);
        				break;
        			}
        			else if(Tlong<8&&"contact".substring(0,Tlong).equalsIgnoreCase(cType))
        			{
        				PIMContact con = new PIMContact();
        				con.managerCon();
        				PIMItem.add(con);
        				break;
        			}
        			else if(Tlong<12&&"appointment".substring(0,Tlong).equalsIgnoreCase(cType))
        			{
        				PIMAppointment app = new PIMAppointment();
        				app.managerApp();
        				PIMItem.add(app);
        				break;
        			}
        			else
        	    	{
        	    		System.out.println("Unknown item type");
        	    	}
        	    }
        	}
        	else if(index<5&&save.substring(0,index).equalsIgnoreCase(cmd))
        	{
        		saveItem();
        	}
        	else if(index<5&&load.substring(0,index).equalsIgnoreCase(cmd))
        	{
        		loadItem();
        	}
        	else if(index<5&&quit.substring(0,index).equalsIgnoreCase(cmd))
        	{
        		System.exit(0);
        	}
        	else
        	{
        		System.out.println("Unknown command:" + cmd); //there is not the command
        	}	
        }	
    }		
}