<dependency>
      <groupId>cn.hutool</groupId>
      <artifactId>hutool-core</artifactId>
      <version>5.6.5</version>
    </dependency>

    File dest = new File("C:\\Users\\Administrator\\Desktop\\xuzhu/writeTest6.txt") ;
    OutputStream outputStream = null;
    ObjectInputStream inputStream = null;
    FileInputStream fis = null;
    try {
      boolean isCloseOut = false;
      StudentDto student = new StudentDto();
      student.setName("小虚竹");
      student.setAge(18);
      student.setsNo("nb9527");
      StudentDto student1 = new StudentDto();
      student1.setName("张三");
      student1.setAge(18);
      student1.setsNo("nb007");
       outputStream = new ObjectOutputStream(new FileOutputStream(dest));
      IoUtil.writeObjects(outputStream,isCloseOut,student,student1);
      IoUtil.close(outputStream);
      //创建序列化流对象
      fis = new FileInputStream(dest);
      inputStream = new ObjectInputStream(fis);
      //读取
      Object obj =null;
      //用available判断是否达到了文件末尾
      while(fis.available()>0) {
        obj=inputStream.readObject();
        System.out.println(obj);
      }
    }catch (Exception e) {
      //抛出一个运行时异常(直接停止掉程序)
      throw new RuntimeException("运行时异常",e);
    } finally {
      IoUtil.close(outputStream);
      IoUtil.close(inputStream);
      IoUtil.close(fis);
    }