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()); }}

输出结果：

null密码