参考地址：1. http://blog.csdn.net/yczz/article/details/38761237

 

 

File类

ObjectInputStream  &&  ObjectOutputStream, 该流允许读取或写入用户自定义的类，但被读取或写入的类必须实现了Serializable接口 DataInputStream  &&  DataOutputStream  有时没有必要存储整个对象的信息，而只是要存储一个对象的成员数据，成员数据的类型假设都是Java的基本数据类型，这样的需求不必使用到与Object输入、输出相关的流对象，可以使用DataInputStream、DataOutputStream来写入或读出数据 打算将Member类实例的成员数据写入文件中，并打算在读入文件数据后，将这些数据还原为Member对象。下面的代码简单示范了如何实现这个需求

 

1 package com.hxw.io;   2  3 class Student implements Serializable{   4    private String name;   5    private int age;   6      7    public Student(String name, int age) {   8       super();   9       this.name = name;  10       this.age = age;  11    }  12    13    @Override  14    public String toString() {  15       return "Student [name=" + name + ", age=" + age + "]";  16    }  17     18     19 }20    21 import java.io.*;     22 public class ObjetStream { 23    public static void main(String[] args) { 24       ObjectOutputStream objectwriter = null;  25       ObjectInputStream objectreader = null;  26        27       try {  28          objectwriter = new ObjectOutputStream(new FileOutputStream("D:/David/Java/java 高级进阶/files/student.txt"));  29          objectwriter.writeObject(new Student("gg", 22));  30          objectwriter.writeObject(new Student("tt", 18));  31          objectwriter.writeObject(new Student("rr", 17));  32 33          objectreader=new ObjectInputStream(new FileInputStream("D:/David/Java/java 高级进阶/files/student.txt"));  34          for (int i = 0; i < 3; i++) {  35             System.out.println(objectreader.readObject());  36          }  37       } catch (IOException | ClassNotFoundException e) {  38          // TODO自动生成的 catch 块  39          e.printStackTrace();  40       }finally{  41          try {  42             objectreader.close();  43             objectwriter.close();  44          } catch (IOException e) {  45             // TODO自动生成的 catch 块  46             e.printStackTrace();  47          }            48       }         49    }     50 }

 

1 package com.hxw;   2 public class Member {   3     private String name;   4     private int age;   5     public Member() {   6     }   7    public Member(String name, int age) {   8         this.name = name;   9         this.age = age;  10     }  11     public void setName(String name){  12         this.name = name;  13     }  14     public void setAge(int age) {  15         this.age = age;  16     }  17     public String getName() {  18         return name;  19     }  20     public int getAge() {  21         return age;  22     }  23 }  24 25 26 import java.io.*;  27 public class DataStreamDemo  28 {  29     public static void main(String[]args)  30     {  31         Member[] members = {
    new Member("Justin",90),  32                 new Member("momor",95),  33                 new Member("Bush",88)};  34         try {  35             DataOutputStream dataOutputStream = new DataOutputStream(new FileOutputStream(args[0]));  36 37             for(Member member:members)  38             {  39                 //写入UTF字符串  40                 dataOutputStream.writeUTF(member.getName());  41                 //写入int数据  42                 dataOutputStream.writeInt(member.getAge());  43             }  44 45             //所有数据至目的地  46             dataOutputStream.flush();  47             //关闭流  48             dataOutputStream.close();  49 50             DataInputStream dataInputStream = new DataInputStream(new FileInputStream(args[0]));  51 52             //读出数据并还原为对象  53             for(int i=0;i