字节流 文件输入流

public class InputStreanTest {
    public static void main(String[] args) {
        InputStream fis=null;
        try{
            //2.创建文件输入对象
            fis=new FileInputStream("D:\\doc\\test.txt");
            //3.执行读操作
            byte[]words =new byte[1024];
            int len=0;//实际读取长度
            System.out.println("文件内容: ");
            while((len=fis.read(words))>0){
                System.out.println(new String(words,0,len));
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            //4.关闭输出流
            try{
                if (fis!=null){
                    fis.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}