java / beginner
Snippet
Type-Safe Configuration with @ConfigurationProperties
Instead of multiple @Value annotations, @ConfigurationProperties allows you to map a group of related properties (e.g., mail.host, mail.port) directly to a POJO.
snippet.java
java
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@Configuration@ConfigurationProperties(prefix = "mail")public class MailConfig {private String host;private int port;public void setHost(String host) { this.host = host; }public void setPort(int port) { this.port = port; }}
spring
Breakdown
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@ConfigurationProperties(prefix = "mail")
Binds all properties starting with 'mail' to this class fields.
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public void setHost(String host)
Setters are required for Spring to inject the values into the fields.