ObjectInputStream读取对象时报java.io.EOFException

错误内容：

java.io.EOFException
	at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:3076)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1616)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:501)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:459)
	at com.study.utils.DataUtils.readBricksData(DataUtils.java:833)
	at com.study.test.MyTest.main(MyTest.java:11)

原对象实现了Serializable接口和重写了toString()方法，但是仍然报错

之前是这样写的：

        // 对象流的写入：ArrayList<Brick> bricks;
        try (ObjectOutputStream osc = new ObjectOutputStream(new FileOutputStream(file))
        ) {

            // 往新文件中写入对象(文件中的内容是乱码的)(序列化)
            for (int i = 0; i < bricks.size(); i++) {
                osc.writeObject(bricks.get(i));
            }
            osc.flush();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

// 读取流文件
    try (
             ObjectInputStream ois = new ObjectInputStream(new FileInputStream("files/brickData.txt"))
        ) {
            // 从新文件中读取对象信息(反序列化)
            while (brick != null) {
                bricks.add(brick);
                try {
                   brick = (Brick) ois.readObject();
                } catch (EOFException e) {
                    System.out.println("出错啦");
                    e.printStackTrace();
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }

修改之后是这样的（如此在之前的前提下就可以成功读取）：

        // 对象流的写入：ArrayList<Brick> bricks;
        try (ObjectOutputStream osc = new ObjectOutputStream(new FileOutputStream(file))
        ) {

            // 往新文件中写入对象(文件中的内容是乱码的)(序列化)
            osc.writeObject(bricks);
            osc.flush();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

// 读取流文件
    try (
             ObjectInputStream ois = new ObjectInputStream(new FileInputStream("files/brickData.txt"))
        ) {
            // 从新文件中读取对象信息(反序列化)
            bricks = (ArrayList<Brick>) ois.readObject();

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }