Java transient关键字与序列化操作实例详解
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.IOException private 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
Student [stuno=10001, stuname=张三, stuage=0]
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希望本文所述对大家java程序设计有所帮助。
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