我正在解决一个非常痛苦的难题，我无法解决...虽然我能够序列化/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，但无法弄清楚...到目前为止，我已经设法将其写入文件FootballClub.ser。以下是我的最佳尝试，但我得到了
线程“主”中的异常java.lang.ClassCastException：无法将java.util.ArrayList强制转换为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;
}
}
您已序列化一个，List但正在反序列化到FootballClubNL。只需更改此行
FootballClubNL club = (FootballClubNL)in.readObject();
到
desrializaedClubs = (ArrayList<FootballClubNL>)in.readObject();
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