Java transient关键字与序列化操作实例详解

2019-11-26 08:36:30

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本文实例讲述了Java transient关键字与序列化操作。分享给大家供大家参考，具体如下：

一介绍

transient关键字不会进行JVM虚拟机的序列化，但也可以自己进行序列化，要用到下面两个函数。这两个函数来自ArrayList源码，可以分析ArrayList源码的序列化和反序列化问题。这样做可以对有效元素进行序列化，不对无效元素进行序列化，以提高网络传输性能。

private void writeObject(java.io.ObjectOutputStream s)throws java.io.IOExceptionprivate void readObject(java.io.ObjectInputStream s) throws java.io.IOException, ClassNotFoundException

二实例

package com.imooc.io;import java.io.Serializable;public class Student implements Serializable{  private String stuno;  private String stuname;  //该元素不会进行jvm默认的序列化  private transient int stuage;   public Student(String stuno, String stuname, int stuage) {     super();     this.stuno = stuno;     this.stuname = stuname;     this.stuage = stuage;  }  public String getStuno() {     return stuno;  }  public void setStuno(String stuno) {     this.stuno = stuno;  }  public String getStuname() {     return stuname;  }  public void setStuname(String stuname) {     this.stuname = stuname;  }  public int getStuage() {     return stuage;  }  public void setStuage(int stuage) {     this.stuage = stuage;  }  @Override  public String toString() {     return "Student [stuno=" + stuno + ", stuname=" + stuname + ", stuage="         + stuage + "]";  }}

package com.imooc.io;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;public class ObjectSeriaDemo1 {  public static void main(String[] args) throws Exception{     String file = "demo/obj.dat";     //1.对象的序列化     ObjectOutputStream oos = new ObjectOutputStream(         new FileOutputStream(file));     Student stu = new Student("10001", "张三", 20);     oos.writeObject(stu);     oos.flush();     oos.close();     ObjectInputStream ois = new ObjectInputStream(         new FileInputStream(file));     Student stu1 = (Student)ois.readObject();     System.out.println(stu1);     ois.close();   }}

三运行结果