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rAnDomACCEssFilE rwD

"r" 以只读方式打开。调用结果对象的任何 write 方法都将导致抛出 IOException。 "rw" 打开以便读取和写入。如果该文件尚不存在,则尝试创建该文件。 "rws" 打开以便读取和写入,对于 "rw",还要求对文件的内容或元数据的每个更新都同步写入到底...

"rws" Open for reading and writing, as with "rw", and also require that every update to the file's content or metadata be written synchronously to the underlying storage device. "rwd" Open for reading and writing, as with "rw",...

"r" 以只读方式打开。调用结果对象的任何 write 方法都将导致抛出 IOException。 "rw" 打开以便读取和写入。如果该文件尚不存在,则尝试创建该文件。 "rws" 打开以便读取和写入,对于 "rw",还要求对文件的内容或元数据的每个更新都同步写入到底...

下载功能实际上就是将远程服务器的文件流通过ftp功能转换为本地文件流进行存储。...{ RandomAccessFile accessFile = new RandomAccessFile(saveFile, "rwd"); ...

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