DataInputStream与DataOutputStream

可以读写基本数据类型的数据
数据输入流：DataInputStream

• DataInputStream(InputStream in)

数据输出流：DataOutputStream

• DataOutputStream(OutputStream out)

    // 创建数据输出流对象
        DataOutputStream dos = new DataOutputStream(new FileOutputStream(
                "test.txt"));
        // 写数据了
        dos.writeByte(1);
        dos.writeShort(2);
        dos.writeInt(3);
        dos.writeLong(4);
        dos.writeFloat(5.0f);
        dos.writeDouble(6.0);
        dos.writeChar('a');
        dos.writeBoolean(true);
        // 释放资源
        dos.close();

        DataInputStream dis = new DataInputStream( new FileInputStream("test.txt"));
        // 读数据
        byte b = dis.readByte();
        short s = dis.readShort();
        int i = dis.readInt();
        long l = dis.readLong();
        float f = dis.readFloat();
        double d = dis.readDouble();
        char c = dis.readChar();
        boolean bb = dis.readBoolean();
        // 释放资源
        dis.close();

        System.out.println(b);
        System.out.println(s);
        System.out.println(i);
        System.out.println(l);
        System.out.println(f);
        System.out.println(d);
        System.out.println(c);
        System.out.println(bb);

输出：
1
2
3
4
5.0
6.0
a
true