Java IO流--数据流DataInputStream和DataOutputStream的使用

@Test
    public void test2(){
        DataOutputStream dos = null;
        try {
            dos = new DataOutputStream(new FileOutputStream("demo.txt"));
            dos.writeUTF("程序员");
            dos.writeInt(30);
            dos.writeBoolean(true);
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if (dos!=null) {
                try {
                    dos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    @Test
    public void test3(){
        DataInputStream dis = null;
        try {
            dis = new DataInputStream(new FileInputStream("demo.txt"));
            String name = dis.readUTF();
            int age = dis.readInt();
            boolean isMale = dis.readBoolean();
            System.out.println("name=" + name);
            System.out.println("age=" + age);
            System.out.println("isMale=" + isMale);
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if (dis!=null) {
                try {
                    dis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }