文件寫入方法：public void writeObjectM(Object obj) throws Exception{??String file = "D:/1/data/Manager.dat";??ObjectOutputStream ooc = new ObjectOutputStream(????new FileOutputStream(file));????ooc.writeObject(obj);????ooc.flush();????ooc.close();?}//下面這種寫入沒有問題。Manager [] ma = {new Manager(1,2,"aaa"),new Manager(1,3,"bbb")};writeObjecM(ma);//因為程序中用到了ArrayList DB，在后面從ArrayList 保存對象到文件就不會了。。。Object m[] = readObjectM();?for (int i = 0; i < m.length ; i++){???Manager a = (Manager)m[i];???DB.add(a);??}//程序中修改了對象的屬性，將對象再次保存到文件中就出錯了。。。writeObjectM(DB);和for (int i = 0 ; i < DB.size(); i++)???{????Manager s = (Manager) DB.get(i);?????writeObjectM(s);???}都出現(xiàn)問題，程序一開始的讀入出錯，學期大作業(yè)，真是不會改了，求大神幫忙。orz