Java中RandomAccessFile类怎么随机访问

WBOY
WBOY 转载
2023-04-28 09:31:06 661浏览

1、过程

(1)既可以充当一个输入流, 也可以冲淡一个输出流

(2)支持从文件的开头读取、写入

(3)支持从任意位置的读取、写入(插入)

(4)RandomAccessFile类需要指定的访问模式:

2、实例

    public void RandomAccessFile(String src, String srcMode, String dest, String destMode) {
        RandomAccessFile accessFile = null;
        RandomAccessFile accessFile1 = null;
        try {
            accessFile = new RandomAccessFile(new File(src), srcMode);
            accessFile = new RandomAccessFile(new File(dest), destMode);
            byte[] bytes = new byte[1024];
            int length;
            while ((length = accessFile.read(bytes)) != -1) {
                accessFile1.write(bytes, 0, length);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (accessFile != null)
                try {
                    accessFile.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
 
            if (accessFile1 != null) {
                try {
                    accessFile1.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

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