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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