Java中对象操作流

ObjectOutputStream

构造方法

• ObjectOutputStream(OutputStream out)
  创建一个写入指定的OutputStream的ObjectOutputStream对象

成员方法

• void writeObject(Object obj)
  将指定的对象写入ObjectOutputStream

示例代码

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;

public class ObjectOutputStreamTest1 {
    public static void main(String[] args) throws IOException {
        User user1 = new User("tangsan","123456");

        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("io-practice\\user1.txt"));
        
        oos.writeObject(user1);
        oos.close();
    }

}

ObjectInputStream

构造方法

• ObjectInputStream(InputStream in)
  创建从指定的InputStream读取的ObjectInputStream

成员方法

• Object readObject()
  从ObjectInputStream读取一个对象

示例代码

import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;

public class ObjectInputStreamTest1 {
    public static void main(String[] args) throws IOException, ClassNotFoundException {
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream("io-practice\\user1.txt"));
        //此处ois读取出来的数据是Object类型的，需要强转为User类型
        User user1 = (User) ois.readObject();

        //System.out.println(user1.toString());
        System.out.println(user1);

        ois.close();
    }
}