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 stubString 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());}}输出结果：
null密码