卖电影票，把数据存到文本里，类似数据库存储

package com.entriy;

import java.io.Serializable;

public class film implements Serializable {
    private String filename;//电影名
    private String date;//观看时间
    private String sno;//座位号
	public String getFilename() {
		return filename;
	}
	public void setFilename(String filename) {
		this.filename = filename;
	}
	public String getDate() {
		return date;
	}
	public void setDate(String date) {
		this.date = date;
	}
	public String getSno() {
		return sno;
	}
	public void setSno(String sno) {
		this.sno = sno;
	}
	public film(String filename, String date, String sno) {
		super();
		this.filename = filename;
		this.date = date;
		this.sno = sno;
	}
	public film() {
		super();
	}


}

package com.entriy;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Scanner;

public class ticket {

	public static void main(String[] args) throws Exception {
		// TODO Auto-generated method stub
		File file = new File("D:\\a\\movie.txt");
		String con = "";
		do {
			System.out.println("==欢迎来到 幻影影院  ==");
			System.out.println("1.购票\n2.退出\n请选择：");
			Scanner sca = new Scanner(System.in);
			int num = sca.nextInt();
			switch (num) {
			case 1:
				sell();
				break;
			case 2:
				System.out.println("謝謝使用");
				System.exit(0);
				break;
			}
			System.out.println("是否继续购票  y\\n ");
			con = sca.next();
		} while (con.equals("y"));

	}

	public static void init() throws Exception {
		File file = new File("d:\\a\\movie.txt");
		if (!file.exists()) {
			file.createNewFile();
			ArrayList<film> list = new ArrayList<film>();
		FileOutputStream fos = new FileOutputStream(file);
		ObjectOutputStream op = new ObjectOutputStream(fos);
		op.writeObject(list);
		op.close();
		}
		
	}

	public static void sell() throws Exception {
		File file = new File("D:\\a\\movie.txt");
		if (!file.exists()) {
			file.createNewFile();
		}
		Scanner sca = new Scanner(System.in);
		System.out.println("请输入要观看的电影");
		String fname = sca.next();
		System.out.println("请输入要观看的电影时间");
		String date = sca.next();
		System.out.println("请输入座位号 (几排)-(几号)");
		String sno = sca.next();
		FileInputStream fis = new FileInputStream(file);
		ObjectInputStream ois = new ObjectInputStream(fis);
		ArrayList<film> list = (ArrayList<film>) ois.readObject();
		boolean flag = false;
		for (int j = 0; j < list.size(); j++) {
			if(((list.get(j).getFilename()).equals(fname)
					&& (list.get(j).getDate()).equals(date) && (list.get(j)
					.getSno()).equals(sno))) {
				System.out.println("此票已卖出，请重新选择");
				sell();
				flag = true;
				break;
			}
		}if (flag == false) {
				System.out.println("购票成功");
			}

		film film = new film(fname, date, sno);
		list.add(film);
		FileOutputStream fos = new FileOutputStream(file);
		ObjectOutputStream op = new ObjectOutputStream(fos);
		op.writeObject(list);
		op.close();
		ois.close();
	}

}