寻找解决方案[Java，Regex？]

Question

I have the following usecase and looking for the right solution.

We are reading a csv file and populating a POJO.One column in from the file could map to multiple fields in the POJO.

eg:

Class Test {

private String field1;
private String field2;
private String field3;
......
other fields
---
getter methods
.....
 setter methods 
}

Let us say value of column XXXX from file is 123_TEST_34_THJ

the field1 value is 123 field2 value is 34 filed3 value THJ

I can do this in the Java code, but I am looking a solution to split this dynamically. Let us say the value of XXXX is now changed to 124_34_THJ, I want my code to work just with a configuration change. What would be a better solution? Please let me know if the question is not clear.

Answer 1

You could use a regular expression with named captures:

(?<field1>\d+)_\w+_(?<field2>\d+)_(?<field3>\w+)

Then next week it might be...

(?<field2>\d+)_(?<field7>\w+)_(?<field1>\d+)_(?<field3>\w+)

More info on your choices for regex libraries with named captures at Regex Named Groups in Java