- 存在背景 :在内存中可以创建可复用的Java对象,,但是会随着JVM的停止儿消失,但是在部分场景中,JVM停止后需要保存指定的对象,Java对象序列化满足了这一需求
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实现过程
- 实体类实现 Serializable接口
public class User implements Serializable
- ObjectInputStream写入对象
//write object into file
ObjectOutputStream oos = null; try{ oos = new ObjectOutputStream(new FileOutputStream("tempfile")); oos.writeObject(user); }catch (Exception e){ e.printStackTrace(); }finally { IOUtils.closeQuietly(oos); }
- ObjectOutputStream 读取对象
//read object from file File file = new File("tempFile"); ObjectInputStream ois = null; try { ois = new ObjectInputStream(new FileInputStream(file)); User newUser = (User) ois.readObject(); System.out.println(newUser); }catch (IOException e){ e.printStackTrace(); }catch (ClassNotFoundException e){ e.printStackTrace(); }finally { IOUtils.closeQuietly(ois); try { FileUtils.forceDelete(file); } catch (IOException e) { e.printStackTrace(); } }