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java - 写入 ObjectOutputStream 附加文件，不断收到 StreamCorruptedException 错误

转载 作者：行者123 更新时间：2023-11-30 10:45:31 25 4
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我想写一个带有追加的对象文件。我在下面有一个 NewContact 类和主类:

private String name;
    private String sex;
    private String mail;
    private String phone;
    private String image;
    //setter and getter method. removed it to avoid the long post.

    public NewContact() {
    }

    public NewContact(String name, String sex, String phone, String mail, String image) {
        this.name = name;
        this.sex = sex;
        this.mail = mail;
        this.phone = phone;
        this.image = image;

    }

    public String Xuat()
    {
        return this.getName()+" "+this.getSex()+" "+this.getPhone()+" "+this.getMail()+" "+this.getImage();

    }
    @Override
    public String toString(){
        //return this.name+" "+this.sex+" "+this.phone+" "+this.mail+" "+this.image;
        return this.getName()+" "+this.getSex()+" "+this.getPhone()+" "+this.getMail()+" "+this.getImage();
    }





///main class
    public static void main(String[] args) throws IOException, ClassNotFoundException {
            File file = new File("F:\\students.txt");
            ArrayList<NewContact> students = new ArrayList<NewContact>();
            students.add(new NewContact("Tom","Male","99245","f@gmail.com","sdgsg"));
            students.add(new NewContact("Mark","Male","365465","wegg@gmail.com","sdgsg"));
            students.add(new NewContact("Dave","Male","35346","dfhdfhfdh@gmail.com","sdgsg"));

            FileOutputStream fo = new FileOutputStream(file,true);
            ObjectOutputStream output = new ObjectOutputStream(fo);

            for ( NewContact s : students) {
                output.writeObject(s);
                //output.reset();

            }
            output.close();
            fo.close();

            FileInputStream is = new FileInputStream(file);
            ObjectInputStream input = new ObjectInputStream(is);

            try {
                while(true) {
                        NewContact s = (NewContact)input.readObject();
                        System.out.println(s);
                }
            } catch (EOFException ex) {

            }        
        }

我昨天一整天都在为这个问题苦苦挣扎。无法上类。如果我只是写正常(没有追加)，那完全没问题。但是当我尝试附加它时，它不断出现错误 StreamCorruptedException: invalid type code: AC。

在研究的过程中，我什至添加了这个类

public class AppendingObjectOutputStream extends ObjectOutputStream{
    public AppendingObjectOutputStream(OutputStream out) throws IOException {
    super(out);
  }

  @Override
  protected void writeStreamHeader() throws IOException {
    // do not write a header, but reset:
    // this line added after another question
    // showed a problem with the original
    reset();
  }
}

还是不行 :(。

25 4 0
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