How to replace String with different slashes? [duplicate]

Question

I need to rename some paths in database.
I rename folder:

String mainFolder= "D:\test\1\data"; //folder renamed from fd

Then i need to rename all files and directories inside that folder:

    String file1="D:\test\1\fd\dr.jpg";
    String folder1="D:\test\1\fd\fd"; // in this case last fd needs to be renamed
    String folder2="src/fd/fd/"; //fake path also needs to be renamed

What is the best and fastest way to rename that strings?
My thoughts about "/":

        String folder2= "src/da/da";
        String[] splittedFakePath = folder2.split("/");
        splittedFakePath[splittedFakePath.length - 2] = "data";

        StringBuffer newFakePath = new StringBuffer();
        for (String str : splittedFakePath) {
            newFakePath.append(str).append("/");
        }

String after rename: src/data/da/
But when im trying split by "\":

Arrays.toString(Pattern.compile(File.separator).split(folder1));

I receive:

java.util.regex.PatternSyntaxException: Unexpected internal error near index 1
\
 ^

Backslash is a special character in regexes. You need to double it or use Pattern.compile(File.separator,Pattern.LITERAL). — RealSkeptic
– RealSkeptic, Commented Jan 26, 2016 at 22:11
\ is special in String literal but also in regular expression engine which split is using so you need to escape it twice: once in regex \\ and second time in String "\\\\". — Pshemo
– Pshemo, Commented Jan 26, 2016 at 22:11

Edwin Buck · Accepted Answer · 2016-01-26 22:11:29Z

0

Look into java's String replace(...) method.

It is wonderful for string replacement, much better than attempting a regex.

Keep in mind that real directory handling has a few special cases, which don't lend themselves well to direct string manipulation. For example '//' often gets compacted to '/' in Unix like systems, and if you care about proper directory corner-cases, then use the Java Path class

answered Jan 26, 2016 at 22:11

Edwin Buck

71.2k7 gold badges103 silver badges145 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Ruslan Lomov Over a year ago

When i get a path of the file i receive string with "\" . Is it necessary to replace "\" with "/" before save them to database?

Edwin Buck Over a year ago

@RuslanLomov Remember that in Java, the character '\' is an escape indicator, for example '\n' is a newline, '\t' is a tab. To get a single character you need to escape the slash, like so '\\'. Also, I don't know what your database's requirements are, but those requirements are more important than my opinion.

Collectives™ on Stack Overflow

How to replace String with different slashes? [duplicate]

1 Answer 1

2 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Linked

Related