to extract substrings from file path using regex in java

Question

I am new to regex and i want to extract strings from file path. Below is the mentioned filepath from which i want to extract string:

input : c://dev-dl-data-d2-us=east-1-5148727/all/stage/clinical/cro/raw/c/ca209_040/2018/08/02/aesae.csv

Output: ca209_040,aesae.csv

what are the rules?What have you tried? – Scary Wombat Sep 05 '18 at 08:36 — Scary Wombat, Sep 05 '18 at 08:36

score 0 · Answer 1 · answered Sep 05 '18 at 08:49

0

Try this one, it matches either ca followed by one or more[0-9_] until it reaches / or the last word with .csv, you can insert comma( ,) after the match.

ca[0-9_]+|[a-z]+\.csv

demo here

answered Sep 05 '18 at 08:49

The Scientific Method

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score 0 · Answer 2 · answered Sep 05 '18 at 09:02

One of possible solutions:

raw\/c\/(\w+).*\/([^\/]+)$

The fragments you want are the content of both capturing groups:

Group 1: A sequence of word chars after raw/c/.
Group 2: A sequence of chars between the last / and the end of string.

Note that the pattern for group 2 contains a sequence of chars other than /, so the preceding / matches just the last /.

to extract substrings from file path using regex in java

2 Answers2