CODEWITHSUNDEEP
javaspringlistannotations
Wuaner
Wuaner

Reputation: 969

Spring @Value split empty string to a List

I using @Value("#{'${names}'.split(',')}") to loading List from properties file. But if the value of names in properties file is unset like this

names=

then Spring will initialize a list with size 1, not size 0, and the only element in this list is a empty string, that's weird.

I want to know is this a bug, or Im using it wrong? Im using spring 3.2.3 btw.

Thanks.

Upvotes: 1

Views: 1841

Answers (2)

EnGoPy
EnGoPy

Reputation: 353

Other solution if you don't want to use external libraries is to use elvis expression.
Maybe not very elegant but works.

@Value("#{'${names}'.empty?(new java.util.ArrayList()):'${names}'.split(',')}")

Upvotes: 0

dabaicai
dabaicai

Reputation: 999

It's not bug of spring,is is a defect of method split in String class,example:

"".split(",");

the result length is 1,and contain a empty string;

Upvotes: 1

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