java 对象输入输出流读写文件的操作实例

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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