Question

我知道这个问题可以回答，但我无法找到解决方案。我有一个书类，我创建了对象。我想要的是每次创建对象时，它都会保存到文件books.txt。我还需要能够打开此文件并随时阅读它，并能够通过参数ex::(String name)搜索对象。我已经阅读了很多主题但我无法找到解决方案。

当我尝试打开文件并搜索对象时，第一个对象打印正常，但是当它打开第二个对象时，它会给我一些错误：

java.io.StreamCorruptedException: invalid type code: AC
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1379)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
    at Search.deserialzeBookName(Search.java:80)
    at Search$1.actionPerformed(Search.java:58)

代码：

 public void saveAll() {
  int day = Integer.parseInt(arrDay.getText());
  int month = Integer.parseInt(arrMonth.getText());
  int year = Integer.parseInt(arrYear.getText());
  this.date1 = new GregorianCalendar(year, month, day).getTime();

  day = Integer.parseInt(deppDay.getText());
  month = Integer.parseInt(deppMonth.getText());
  year = Integer.parseInt(deppYear.getText());
  this.date2 = new GregorianCalendar(year, month, day).getTime();

  //System.out.println(date1);v
  Book b;
  b = new Book(onoma.getText(), epitheto.getText(), tilefono.getText(), date1, date2, toType(domatio.getText()), check());//dates
  File f = new File ("books.txt");

  try {
    FileOutputStream fout = new FileOutputStream("books.txt",true);
    ObjectOutputStream oos = new ObjectOutputStream(fout);
    oos.writeObject(b);
    oos.close();
    System.out.println("Done");

  } catch (FileNotFoundException e) {
    System.err.println("FileNotFound error");
    e.printStackTrace();
  } catch (IOException e) {
    System.err.println("IOException error");
    e.printStackTrace();
  }
}

搜索功能：

public Book deserialzeBookName(){
  Book address;
  try{
    FileInputStream fin = new FileInputStream("books.txt");
    ObjectInputStream ois = new ObjectInputStream(fin);
    while((address =(Book) ois.readObject()) !=null){
      System.out.println(address);
    }

    ois.close();
    //address = (Book) ois.readObject();
    //ois.close();

    return address;
  }catch(Exception ex){
    ex.printStackTrace();
    return null;
  } 
}

输入和输出java中的Streams

0 个答案: