java / beginner
Snippet
Mapping Structured Configuration Properties to Strongly Typed Objects
Spring Boot allows mapping hierarchical configuration keys from application.properties directly into type-safe Java objects or records using @ConfigurationProperties. This guarantees clean data typing and compile-time property safety.
snippet.java
java
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@ConfigurationProperties(prefix = "app.mail")public record MailProperties(String host,int port,boolean enableTls) {}
spring
Breakdown
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@ConfigurationProperties(prefix = "app.mail")
Binds properties starting with the app.mail prefix to the fields of this record.
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public record MailProperties(
Defines an immutable Java record container to hold configuration values.
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String host, int port, boolean enableTls
Specifies strongly typed fields corresponding to app.mail.host, app.mail.port, and app.mail.enable-tls.