java基础--流读写文件（由浅入深）

最新推荐文章于 2025-06-11 10:25:36 发布

xiyangyang8110

最新推荐文章于 2025-06-11 10:25:36 发布

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分类专栏： java

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1指定每次读2个字节

 FileInputStream  fis = new FileInputStream("c.txt");
        int length;
        byte[] bytes=new byte[2];
        while ((length=fis.read(bytes))!=-1){
            System.out.println("bytes = " + new String(bytes,0,length));
        }
        fis.close();

日志：

bytes = df
bytes = 6y
bytes = y6
bytes = 56

2 读写文件

		 System.out.println("start = " + new Date().toLocaleString());
		FileInputStream  fis = new FileInputStream("c.txt");
        FileOutputStream fileOutputStream = new FileOutputStream("c1.txt");
        int length;
        byte[] bytes=new byte[2];
        while ((length=fis.read(bytes))!=-1){
            System.out.println("bytes = " + new String(bytes,0,length));
            System.out.println("toLocaleString = " + new Date().toLocaleString());
            fileOutputStream.write(bytes,0,length);
        }
        fis.close();
        fileOutputStream.close();
        System.out.p