java 对象输入输出流读写文件的操作实例

java 支持对对象的读写操作，所操作的对象必须实现Serializable接口。

实例代码：

package vo;

import java.io.Serializable;

public class Animal implements Serializable {

private static final long serialVersionUID = 1L;

private String name;

private Integer weight;

private String color;

private String type;

private Integer age;

private Integer lifetime;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Integer getWeight() {

return weight;

}

public void setWeight(Integer weight) {

this.weight = weight;

}

public String getColor() {

return color;

}

public void setColor(String color) {

this.color = color;

}

public String getType() {

return type;

}

public void setType(String type) {

this.type = type;

}

public Integer getAge() {

return age;

}

public void setAge(Integer age) {

this.age = age;

}

public Integer getLifetime() {

return lifetime;

}

public void setLifetime(Integer lifetime) {

this.lifetime = lifetime;

}

public Animal(String name, Integer weight, String color, String type, Integer age, Integer lifetime) {

super();

this.name = name;

this.weight = weight;

this.color = color;

this.type = type;

this.age = age;

this.lifetime = lifetime;

}

@Override

public String toString() {

return "Animal [name=" + name + ", weight=" + weight + ", color=" + color + ", type=" + type + ", age=" + age + ", lifetime=" + lifetime + "]";

}

}

package objectstream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import vo.Animal;

public class TestObjectStream {

public static void main(String[] args) {

try {

ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File("d:/oos.dat")));

Animal a1 = new Animal("tiger", 120, "red", "cat", 12, 20);

Animal a2 = new Animal("eagle", 10, "gold", "bird", 6, 10);

oos.writeObject(a1);

oos.writeObject(a2);

oos.flush();

oos.close();

ObjectInputStream ois = new ObjectInputStream(new FileInputStream("d:/oos.dat"));

Animal ra1 = (Animal) ois.readObject();

System.out.println(ra1.toString());

Animal ra2 = (Animal) ois.readObject();

System.out.println(ra2.toString());

} catch (Exception e) {

e.printStackTrace();

}

}

}

输出结果：

Animal [name=tiger, weight=120, color=red, type=cat, age=12, lifetime=20]

Animal [name=eagle, weight=10, color=gold, type=bird, age=6, lifetime=10]

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