java之io写入内容和删除

简单写入：

        File file = new File("G:\\870_2_Files\\Test\\os.txt");
        String s = "123";
        OutputStream os = Files.newOutputStream(file.toPath());
        os.write(s.getBytes(StandardCharsets.UTF_8));
        os.close();

 删除：

        File file = new File("G:\\870_2_Files\\Test\\os.txt");
        file.delete();