万人往-开发一种新的文件格式

文件格式并不重要,重要的是处理里面的数据,比如新建一个后缀为.foo的文件

public class Foo {
    @Test
    public  void write() throws IOException{
            File file = new File("C:\\Users\\cwx597167\\Desktop\\demo.foo");
            OutputStream out =new FileOutputStream(file);
            BufferedWriter rw = new BufferedWriter(new OutputStreamWriter(out, "utf-8"));
            rw.write("hello,do u like mi band?");
            rw.close();
            out.close();
    }

    

@Test
    public void read() throws  IOException{
            File file = new File("C:\\Users\\cwx597167\\Desktop\\demo.foo");
            InputStream input = new FileInputStream(file);
            BufferedReader br = new BufferedReader(new InputStreamReader(input, "utf-8"));
            System.out.println(br.readLine());
            input.close();
            br.close();
    }