文件输入流

public class InputStreamTest {
    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");
            System.out.println("可读取的字节数: "+fis.available());
            //3.执行读操作
            int data=0;
            //循环读取数据
            System.out.println("文件的内容: ");
            while((data=fis.read())!=-1){
                System.out.print((char)data+" ");
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try{
                if (fis!=null){
                    fis.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}