Spring boot how to append multiple properties to single value?

Question

I have multiple properties in my application.properties file

prop.a=A
prop.b=B
prop.c=C
// and more

Now i have to add the property A to the rest of them. I am doing this like following

    @Value("${prop.a}")
    private String a;

    @Value("${prop.b}")
    private String b;
    b = new StringBuffer(b).append(a).toString();

I have to individually append each string. Can i do this in the annotation? like @Value("${prop.b}" + "${prop.a}") ?

Is it not OK for you if you do this in application.properties itself? Like prop.b=${prop.a}B? — Sree Kumar
– Sree Kumar, Commented Dec 7, 2021 at 6:57

Sree Kumar · Accepted Answer · 2021-12-07 07:02:19Z

9

If you want to do this programmatically, you have to do this:

@Value( "${prop.a}${prop.b}" )
private String b;

You can, however, achieve this in application.properties itself this way:

prop.a=A
prop.b=${prop.a}B
prop.c=${prop.a}C

(Please note that wherever your example says prob.*,I have changed to prop.*.)

answered Dec 7, 2021 at 7:02

Sree Kumar

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1 Comment

Sorry prob was a typo, question updated