通过 BufferedWriter 发送大字符串
使用 BufferedWriter 发送一个大字符串（5Mb，一个 xml 文件，一行）是否存在问题？
它的工作速度非常快。是否有一些黄金法则不允许行长超过几K？然后我必须编写一些额外的文件传输协议......:-(
is there some problem sending a big String (5Mb, one xml file, all i one line) with a BufferedWriter?
It works very fast. Is there some golden rule disallowing lines longer than a few K? Then I would have to write some extra filetransfer protocol... :-(
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BufferedWriter本身无法决定事情进展的速度。它只是为你做一些缓冲。这实际上取决于您要写入的内容……在 LAN 上，5MB 并不是特别大，但通过移动连接则需要很长时间。换句话说：这取决于。不存在禁止排长队的“黄金法则”……但我们不知道您正在使用什么协议。在您的特定协议中，可能存在大小限制。如果您想要更详细的答案，您必须为您的问题添加更多细节......
The
BufferedWriteritself won't determine how quickly things go. It's just going to do some buffering for you. It really depends on what you're then writing to... on a LAN, 5MB isn't particularly huge, but over a mobile connection it would take a long time.In other words: it depends. There's no "golden rule" disallowing long lines... but then we don't know what protocol you're using. It's possible that in your particular protocol there is a size limit. If you want a more detailed answer, you'll have to add more detail to your question...
如果它有效，那么它就有效。如果不起作用，请将字符串分成块。
If it works, then it works. If it doesn't work, break the string into chunks.
这 5Mb 行是你唯一写的东西吗？如果是这样，那么
BufferedWriter不会在它包装的Writer上添加任何内容。如果您正在进行大量小写入并希望将它们缓冲成更大的块以发送到底层 Writer，那么 BufferedWriter 会很有用，这可能会产生开销write()方法（例如磁盘寻道时间/旋转延迟）。Is this 5Mb line the only thing you're writing? If so then a
BufferedWriterisn't adding anything over theWriterit wraps. ABufferedWriteris useful if you're doing lots of small writes and want to buffer them up into larger chunks to send to the underlyingWriter, which may have an overhead on it'swrite()method (for example disk seek time/rotation delay).接收方可能会遇到一个小问题 - 这是否接受这么长的队伍？
有些程序可能准备接收长线，但针对短线的常见情况进行了优化，因此使用长线会减慢它们的速度。
另外，一行的具体组成也取决于系统 - 大多数情况下，它意味着后面有一个
\n(Unix)，或者一个\r\n( DOS/Windows/大多数公共互联网协议）。另外，请注意写入的行和对 BufferedWriter
write方法的调用是两个正交的事情 - 您可以多次调用write只写一行，或者您可以只用一次write调用来写多行。What might be a little problem is the receiving side - does this accept such long lines?
Some programs might be prepared to receive long lines, but are optimized for the common case of short lines, thus using long lines would slow them down.
Also, what exactly consists a line is system dependent, too - most often it means that there comes a
\nafter it (Unix), or a\r\n(DOS/Windows/most public Internet protocols).Also, take note that lines written and calls to the BufferedWriter
writemethods are two orthogonal things - you can make multiple calls towritewriting only one line at all, or you can write multiple lines with only onewritecall.