Java Streams讀取文件並打印文件上的對象

Question

所以，我需要一些幫助。我有一個class Book，我想將我的書籍對象保存爲Stream，然後閱讀此Stream文件，以便我可以從那裏搜索我的對象。我寫了我的代碼，但它給了我一些錯誤，我可以弄清楚如何打印我的書籍價值。 所以這是我的書類

public class Book { 

    private Date arr; 
    private Date depp; 
    private Type room; 
    private boolean breakfast = false; 
    private Person data; 
    private ObjectOutputStream out; 

    public Book(String name, String surename, String phone,Date arr, Date depp, Type room, boolean breakfast) { 
     data = new Person(name,surename,phone); 
     this.arr = arr; 
     this.depp = depp; 
     this.room = room; 
     this.breakfast = breakfast; 

    } 
    public void writeObjToFile(){//here i save my object to stream it gives me error, i call this method after i create my book object to main 
     try{ 
      out = new ObjectOutputStream(new FileOutputStream("books.txt")); 
      out.writeObject(this);  
     } 
     catch(FileNotFoundException e){ 
      System.err.println("File not Found"); 
      e.printStackTrace(); 
     }catch(IOException e){ 
    System.err.println("IOException"); 

     e.printStackTrace();} 
    } 

} 

，這是我的搜索類：

public class Search { 
    private FileInputStream fis=null; 
    private String filename; 

    public Search(String filename){ 
     this.filename = filename; 

     File file = new File(filename); 

     try { 
      fis = new FileInputStream(file); 

      System.out.println("Total file size to read (in bytes) : " 
        + fis.available()); 

      int content; 
      while ((content = fis.read()) != -1) { 
       // convert to char and display it 
       System.out.print((char) content); 
      } 

     } catch (IOException e) { 
      e.printStackTrace(); 
     } finally { 
      try { 
       if (fis != null) 
        fis.close(); 
      } catch (IOException ex) { 
       ex.printStackTrace(); 
      } 
     } 
    } 
} 

Answer 1

本書應該實現Serializable

檢查API https://docs.oracle.com/javase/7/docs/api/java/io/ObjectOutputStream.html#writeObject%28java.lang.Object%29

另外，去掉了來自Book類的成員，因爲它不是可序列化的。