java导出的文件名带正斜杠,常见问题：文件名中的斜杠???

Why does the faq make this statement regarding slashes in paths:

"This is because the library routines

on these operating systems handle "/"

and "\" interchangeably. "

http://www.parashift.com/c++-faq-lit...html#faq-15.16

This seems like completely the wrong answer for this question. Rather than

saying that you should use forward slash as a delimiter, it should say

something to the effect of "refer to your operating system documentation on how

to specify paths/subdirectories, remembering that in a string literal in C++

the back-slash (\) character modifies the following character, and therefore

operating systems that use a backslash as a directory delimiter should be

encoded as ''\\''.

Comments?

解决方案

Julie spoke thus:

This seems like completely the wrong answer for this question. Rather than

saying that you should use forward slash as a delimiter, it should say

something to the effect of "refer to your operating system documentation on how

to specify paths/subdirectories, remembering that in a string literal in C++

the back-slash (\) character modifies the following character, and therefore

operating systems that use a backslash as a directory delimiter should be

encoded as ''\\''.

FWIW, I''ve been bitten by / vs. \ issues in the past. Whether or not

that behavior is conforming, I''d say it''s safer just to use the

delimiter that the implementation prefers...

--

Christopher Benson-Manica | I *should* know what I''m talking about - if I

ataru(at)cyberspace.org | don''t, I need to know. Flames welcome.

Julie wrote:

Why does the faq make this statement regarding slashes in paths:

"This is because the library routines

on these operating systems handle "/"

and "\" interchangeably. "

http://www.parashift.com/c++-faq-lit...html#faq-15.16

This seems like completely the wrong answer for this question. Rather than

saying that you should use forward slash as a delimiter, it should say

something to the effect of "refer to your operating system documentation on how

to specify paths/subdirectories, remembering that in a string literal in C++

the back-slash (\) character modifies the following character, and therefore

operating systems that use a backslash as a directory delimiter should be

encoded as ''\\''.

It doesn''t seem likely that using ''/'' instead of ''\\'' will /hurt/ you in

any way -- and it should make the code a bit more portable. For full

portability, I don''t think you can assume anything about the directory

separator (or even assume that there are directories, but no one is

likely to complain if you decide to only support systems that support

directories, I think).

-Kevin

--

My email address is valid, but changes periodically.

To contact me please use the address from a recent posting.

Julie wrote:

Why does the faq make this statement regarding slashes in

paths:

"This is because the library routines

on these operating systems handle "/"

and "\" interchangeably. "

http://www.parashift.com/c++-faq-lit...html#faq-15.16

This seems like completely the wrong answer for this

question. Rather than saying that you should use forward

slash as a delimiter, it should say something to the

effect of "refer to your operating system documentation

on how to specify paths/subdirectories, remembering that

in a string literal in C++ the back-slash (\) character

modifies the following character, and therefore operating

systems that use a backslash as a directory delimiter

should be encoded as ''\\''.

Comments?

Using the forward slash is very portable. As the answer

correctly states, even operating systems that natively use

"\" (Windows, DOS, OS/2, etc.) provide library routines that

understand "/". So the "/" is very portable -- certainly

better than "\".

So I wouldn''t call it "completely the wrong answer," but I

would add a disclaimer that nothing is guaranteed by the

standard about directory delimiters. In fact, nothing is

guaranteed about a directories (or even a filesystem)

existing at all.