Client.java

package flight;
import java.util.*;
import java.io.*;

//用户操作界面
public class Client {
	
	private String flightName = null;//航班名
	private int row = 0;//座位排数
	private int rowLength = 0;//每排座位数
	private Flight flight= null;//本次航班对象
	private String cmdString = null;//命令串
	private BufferedReader br = new BufferedReader(new InputStreamReader(System.in));//获取控制台命令
	
	private void commandShell() {
		System.out.println("\n\n=========================");
		System.out.println("type 'exit' command to exit");
		while(true) {
			readCommand();
			processCommand();
		}
	}
	
	private void processCommand() {
		// TODO 自动生成的方法存根
		String[] cmds;
		String cmd;
		if(cmdString != null) {
			cmds = command(cmdString);
			if(cmdString != null) {
				cmd = cmds[0].toLowerCase();
				if(cmd.equals("create")) {
					if(flightName == null)
						createCommand(cmds);
					else {
						System.out.println("Create Error:can't handle more flights");
					}
				}else if(cmd.equals("reserve")) {
					if(flightName != null)
						reserveCommand(cmds);
				}else if(cmd.equals("cancel")) {
					if(flightName != null)
						cancelCommand(cmds);
				}else if(cmd.equals("lsit")) {
					System.out.println("Thanks.See you later.");
					System.exit(0);
				}else {
					System.out.println("Bad command");
					cmdString = null;
				}
			}
		}
	}

	private void cancelCommand(String[] cmds) {
		// TODO 自动生成的方法存根
		if(cmds.length != 2) {
			System.out.println("\ncancel command format error");
			return;
		}
		int bookingNumber = readInt(cmds[1]);
		if(bookingNumber <= 0) {
			System.out.println("\ncancel command parameter error");
			return;
		}
		boolean state = flight.cancel(bookingNumber);
		if(state)
			System.out.println("Your seat has been cancelled");
		else
			System.out.println("The seat has not been reserved");
	}

	private int readInt(String valstr) {
		// TODO 自动生成的方法存根
		int val = 0;
		try {
			val = Integer.parseInt(valstr);
		}catch(Exception e) {
			val = Integer.MIN_VALUE;
		}
		return val;
	}

	private void reserveCommand(String[] cmds) {
		// TODO 自动生成的方法存根
		if(cmds.length <= 1) {
			System.out.println("reserve command error!");
			return;
		}
		String[] names = new String[cmds.length - 1];
		for(int i = 0;i < names.length;i++)
			names[i] = new String(cmds[i + 1]);
		int[] bn = flight.reserve(names);
		if(bn[0] != -1) {
			for(int i = 0; i < bn.length;i++)
				System.out.println(names[i] + "'s Booking Number is:" + bn[i]);
		}else
			System.out.println("No Such Sequential Seat Now");
	}

	private void createCommand(String[] cmds) {
		// TODO 自动生成的方法存根
		if(cmds.length != 4) {
			System.out.println("create command error");
		}
		else {
			flightName = cmds[1];
			row = readInt(cmds[2]);
			rowLength = readInt(cmds[3]);
			if(row <= 0||rowLength <= 0) {
				System.out.println("create command parameters error");
				flightName = null;
				row = 0;
				rowLength = 0;
			}else {
				try {
					flight = new Flight(flightName,row,rowLength);
					System.out.println("create Flight OK");
				}catch(Exception e) {
					System.out.println(e);
					flight = null;
					flightName = null;
					row = 0;
					rowLength = 0;
				}
			}
		}
	}

	private String[] command(String cmdStr) {
		// TODO 自动生成的方法存根
		int cc = 0;
		String[] cmd;
		StringTokenizer st =new StringTokenizer(cmdStr);
		if((cc = st.countTokens()) == 0)
			return null;
		cmd = new String[cc];
		for(int i = 0;i < cc;i++)
			cmd[i] = st.nextToken();
		return cmd;
	}

	private void readCommand() {
		// TODO 自动生成的方法存根
		if(flightName == null) {
			System.out.println("*************************");
			System.out.println("Please Create The Fligth Data First");
			System.out.println("Use command:create fligth_name rows rowLenght<CR>");
			System.out.print("\nCOMMAND>");
			try {
				cmdString = br.readLine().trim();
			}catch(IOException e) {
				System.out.println("command error");
				cmdString = null;
			}
		}
	}
	
	private void listCommand(String[] cmds) {
		if(cmds.length != 1) {
			System.out.println("\nlist command format error");
			return;
		}
		Passenger[] passengerlist = flight.getPassengerList();
		int flag = 0;
		System.out.println("Name Booking Number Row Seat Position");
		System.out.println("---------------------------------------");
		if(passengerlist == null||passengerlist.length <= 0)
			System.out.println("Now no seat is occupied");
		else {
			flag = 0;
			for(int b = 0;b < passengerlist.length;b++) {
				if(passengerlist[b] != null) {
					flag = 1;
					System.out.println(formatStr(passengerlist[b].getName()) + formatStr(""+passengerlist[b].getBookingNumber()) + formatStr(""+passengerlist[b].getRow())+formatStr(""+passengerlist[b].getSeatPosition()));
				}
			}
			if(flag == 0)
				System.out.println("Now no seat is occupied");
		}
	}

	private String formatStr(String s) {
		// TODO 自动生成的方法存根
		for(int i = 0;i < 16 - s.trim().length();i++)
			s +="";
		return s;
	}

	//主方法，程序入口
	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		new Client().commandShell();
		
	}
}