boolean values in Spring application.properties file?

Question

Is it possible to have boolean values in Spring configuration file?

I wrote the following field in my bean:

@Value("${pdk.populatedemo}")
private boolean populateDemo;

but if causes the following exception:

Could not autowire field: private boolean com.inthemoon.pdk.data.DatabaseService.populateDemo; nested exception is org.springframework.beans.TypeMismatchException: 
Failed to convert value of type [java.lang.String] to required type [boolean]; nested exception is java.lang.IllegalArgumentException: 
Invalid boolean value [1;]

here I tried

pdk.populatedemo=1;

in application.properties. I also tried =true and some others.

in `application.properties` I also tried `=true` *with semicolon at the end* ? — akash, Dec 30 '15 at 12:13

score 30 · Accepted Answer · answered Dec 30 '15 at 12:09

30

The correct value for a boolean type would be

pdk.populatedemo=true

1 is not a valid value for a boolean field and you must not use semicolons in your property file for a boolean value (as you clearly can see in the error message).

answered Dec 30 '15 at 12:09

dunni

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In springboot 2/spring 5 "pdk.populatedemo=true" is false and the mechanism was changed to a 1/0 – peterzinho16 Dec 25 '18 at 17:39

score 1 · Answer 2 · answered Aug 27 '21 at 13:57

You have multiple options:

# in case of set it hardcoded ALWAYS true
pdk.populatedemo=true

# in case of set it hardcoded ALWAYS false
pdk.populatedemo=false

# in case of set it dynamically,
# where isPopulatedemo is a system property or an environment variable having a string value either "true" or "false"
pdk.populatedemo=${isPopulatedemo}

boolean values in Spring application.properties file?

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