transient 关键字

transient说明一个属性是临时的，不会被序列化。
下面是一个Demo，name声明为 transient，不被序列化

 

 package com.zzs.tet;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class TransientDemo implements Serializable{
    /**
  *
  */
 private static final long serialVersionUID = 1L;
 private  transient String name;
    private String password;
   
 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }

 public String getPassword() {
  return password;
 }

 public void setPassword(String password) {
  this.password = password;
 }

 /**
  * @param args
  * @throws IOException
  * @throws FileNotFoundException
  * @throws ClassNotFoundException
  */
 public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException {
  // TODO Auto-generated method stub
  String path="D:"+File.separator+"object.txt";
  File file=new File(path);
  TransientDemo transientDemo=new TransientDemo();
  transientDemo.setName("姓名");
  transientDemo.setPassword("密码");
  ObjectOutput output=new ObjectOutputStream(new FileOutputStream(file));
  output.writeObject(transientDemo);
  ObjectInput input=new ObjectInputStream(new FileInputStream(file));
  TransientDemo demo=( TransientDemo )input.readObject();
  System.out.println(demo.getName()+demo.getPassword());
 }

}

结果

null密码