java - 反序列化对象的Arraylist

Question

我正在处理一个无法解决的非常痛苦的难题...虽然我已经能够序列化/反序列化单个对象，但我发现自己目前陷入困境。原因是我正在使用对象的 ArrayList，并且无法弄清楚......到目前为止，我已设法将其写入文件 FootballClub.ser。下面这个是我最好的尝试，但我得到了

线程“main”java.lang.ClassCastException中出现异常:java.util.ArrayList无法转换为FootballClubNL

public class FootballClubFileWriter {

    private static final String filename_1 = "FootballClub.ser";
    private static final String filename_2 = "FootballClub.txt"; //Use for question 5

    public static void serializeToDisk(ArrayList<FootballClubNL> clubs) throws IOException {
            FileOutputStream fos = new FileOutputStream(filename_1);
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            oos.writeObject(clubs);
            fos.close();
            oos.close();
    }


    public static ArrayList<FootballClubNL> deserializeFromDisk()throws IOException, ClassNotFoundException {

        ArrayList<FootballClubNL> desrializaedClubs = new ArrayList<FootballClubNL>();

        FileInputStream fileIn = new FileInputStream("FootballClub.ser");
        ObjectInputStream in = new ObjectInputStream(fileIn);

        FootballClubNL club = (FootballClubNL)in.readObject();

        return desrializaedClubs;
    }

}

Answer 1

试试这个:

desrializaedClubs = (ArrayList<FootballClubNL>)in.readObject();