Question

我正在创建一个包含媒体项目的图书馆，例如dvds或视频游戏，并保存媒体项目列表的文件。我必须创建一个方法，可以读取保存文件中的数据，重新创建媒体项，并将它们放入列表中。我正在考虑对其进行标记，但我无法弄清楚如何开始它。有什么建议？我正在使用java。每个媒体项都包含字符串标题，字符串格式，布尔借用，字符串名称和字符串日期。这个方法将用于在启动程序时加载保存文件。

Answer 1

您可以使用序列化将数据保存到文件并将其读回。虽然你不能阅读文本。

public class MediaSave {
    public static class Media implements Serializable{
        /**
         * 
         */
        private static final long serialVersionUID = 7452860232014574705L;
        public String title;
        public String format;
        public Boolean borrowed;
        public String name;
        public Date date;
        protected Media(String title, String format, Boolean borrowed,
                String name, Date date) {
            super();
            this.title = title;
            this.format = format;
            this.borrowed = borrowed;
            this.name = name;
            this.date = date;
        }
        public String toString(){
            return title + " " + format + " " + borrowed + " " + name + " " + " " +  date ;
        }
    }
    public static void main(String[] args) throws IOException, ClassNotFoundException{
        Media[] media = new Media[4];
        media[0] = new Media("Avatar1", "dvd",true, "jon1", new Date());
        media[1] = new Media("Avatar2", "dvd",true, "jon2", new Date());
        media[2] = new Media("Avatar3", "dvd",true, "jon3", new Date());
        media[3] = new Media("Avatar4", "dvd",true, "jon4", new Date());
        Path p = Paths.get("resources/media.txt");
        File f = p.toFile();
        if(!f.exists()){
            f.createNewFile();
        } 


        try(ObjectOutputStream writer = new ObjectOutputStream(new FileOutputStream(f))){
            writer.writeInt(media.length);
            for(Media m : media){
            writer.writeObject(m);
            }
        }
        try(ObjectInputStream reader = new ObjectInputStream(new FileInputStream(f))){  
            int cnt = reader.readInt();
            for(int i =0 ; i != cnt;i++){
                     Media m=(Media)reader.readObject();
                     System.out.println(m.toString());
            }
        }
    }
}

拆分字符串的想法？

1 个答案: