public static void main(String[] args) {
        String path="F:/1.txt";
        FileInputStream fi=null;
        try {
            fi=new FileInputStream(path);
            //方式一：逐一读取
            /*int c=0;
            while((c=fi.read())!=-1) {
                System.out.println((char)c);
            }*/
            //方式二：数组循环读取
            byte[] by=new byte[1024];
            int len=0;
            while((len=fi.read(by))!=-1) {
                System.out.println(new String(by,0,len));
            }
        } catch (Exception e) {
            if(fi!=null) {
                try {
                    fi.close();
                } catch (IOException e1) {
                    
                    e1.printStackTrace();
                }
            }
        }
    }