You can use "jasypt-spring-boot-starter" for your need. All you to need to do are the following steps.
Download the "jasypt-spring-boot-starter" from maven central repo.
com.github.ulisesbocchio
jasypt-spring-boot-starter
x.x.x
In your Spring Boot start file where the "@SpringBootApplication" annotation is located, just include "@EnableEncryptableProperties". A point to note here is that once you place encryptable properties annotation on the main start file, all the property files of your application will be loaded and scanned by Jaspyt module for any property value that is marked starting with "ENC".
In your "application.properties" file there are few more configurations that needed to be added like below (all these are defaults and you can change these according to your requirement):
jasypt.encryptor.password=<Some password for encryption>
jasypt.encryptor.algorithm=PBEWITHHMACSHA256ANDAES_128
jasypt.encryptor.key-obtention-iterations=1000
jasypt.encryptor.pool-size=1
jasypt.encryptor.salt-generator-classname=org.jasypt.salt.RandomSaltGenerator
jasypt.encryptor.iv-generator-classname=org.jasypt.iv.RandomIvGenerator
jasypt.encryptor.string-output-type=base64
Once you are done with the above steps, now you can place your encrypted property value under the ENC(). Jasypt will scan values which are enclosed in ENC() and will try to decrypt the value.
For e.g.
spring.datasource.password=ENC(tHe0atcRsE+uOTxt2GmFYPXNHREch9R/12qD082gw7vv6bby5Rk)