Propertysource Spring Framework 7 0 5 Api Mastering Propertysource In

🎓 Top 15 Udemy Courses (80-90% Discount): My Udemy Courses - Ramesh Fadatare — All my Udemy courses are real-time and project oriented courses. ▶️ Subscribe to My YouTube Channel (178K+ subscribers): Java Guides on YouTube ▶️ For AI, ChatGPT, Web, Tech, and Generative AI, subscribe to another channel: Ramesh Fadatare on YouTube In this tutorial, we will learn the usage of @PropertySource and @PropertySources annotations in Spring or Spring boot applications.

YouTube Video @PropertySource and @PropertySources Annotations Overview Spring @PropertySource annotation is used to provide properties files to Spring Environment. Spring @PropertySources annotation is used to provide multiple properties files to Spring Environment. These annotations are used with @Configuration classes. Spring @PropertySource annotation is repeatable, which means you can have multiple @PropertySource annotations on a Configuration class. We can use the @Value annotation and Environment class to read the Property file.

@PropertySource and @PropertySources Annotations Example Create a mail.properties file Create a mail.properties file under /resources folder in the Spring boot project and add the following content to it: gmail.host=gmail.com gmail.email=ramesh@gmail.com gmail.password=secret Using @PropertySource annotation Next, let's use @PropertySource annotation to provide mail.properties file to Spring Environment: import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.PropertySource; @Configuration @PropertySource("classpath:mail.properties") public class SpringConfig { } Note that @PropertySource annotation is used with @Configuration class. Next, in order to test this, let's use the @Value annotation and Environment class to read the mail.properties file content from Spring Environment.

Read Property File Using @Value Annotation Let's use @Value annotation to read the mail.properties file content from Spring Environment: import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; @Component public class PropertySourceDemo { @Value("${gmail.host}") private String host; @Value("${gmail.email}") private String email; @Value("${gmail.password}") private String password; public String getHost() { return host; } public String getEmail() { return email; } public String getPassword() { return password; } } Testing Let's write the code to test: import net.javaguides.springannotations.lazy.propertysource.PropertySourceDemo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class SpringAnnotationsApplication { public static void main(String[] args) { var context = SpringApplication.run(SpringAnnotationsApplication.class, args); PropertySourceDemo propertySourceDemo = context.getBean(PropertySourceDemo.class); System.out.println(propertySourceDemo.getHost()); System.out.println(propertySourceDemo.getEmail()); System.out.println(propertySourceDemo.getPassword()); } } Output: gmail.com ramesh@gmail.com secret Read Property File Using Environment class Let's use the Environment class to read the mail.properties file content from Spring Environment:import org.springframework.beans.factory.annotation.Autowired; import org.springframework.core.env.Environment; import org.springframework.stereotype.Component; @Component public class PropertySourceDemo { @Autowired private Environment environment; //@Value("${gmail.host}") private String host; // @Value("${gmail.email}") private String email; // @Value("${gmail.password}") private String password; public String getHost() { return environment.getProperty("gmail.host"); } public String getEmail() { return environment.getProperty("gmail.email"); } public String getPassword() { return environment.getProperty("gmail.password"); } } Testing Let's write the code to test:import net.javaguides.springannotations.lazy.propertysource.PropertySourceDemo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class SpringAnnotationsApplication { public static void main(String[] args) { var context = SpringApplication.run(SpringAnnotationsApplication.class, args); PropertySourceDemo propertySourceDemo = context.getBean(PropertySourceDemo.class); System.out.println(propertySourceDemo.getHost()); System.out.println(propertySourceDemo.getEmail()); System.out.println(propertySourceDemo.getPassword()); } } import net.javaguides.springannotations.lazy.propertysource.PropertySourceDemo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class SpringAnnotationsApplication { public static void main(String[] args) { var context = SpringApplication.run(SpringAnnotationsApplication.class, args); PropertySourceDemo propertySourceDemo = context.getBean(PropertySourceDemo.class); System.out.println(propertySourceDemo.getHost()); System.out.println(propertySourceDemo.getEmail()); System.out.println(propertySourceDemo.getPassword()); } } Output: gmail.com ramesh@gmail.com secret gmail.com ramesh@gmail.com secret Using Multiple @PropertySource Annotations Spring @PropertySource annotation is repeatable, which means you can have multiple @PropertySource annotations on a Configuration class.

For example: import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.PropertySource; @Configuration @PropertySource("classpath:mail.properties") @PropertySource("classpath:messages.properties") public class SpringConfig { } @PropertySources Annotation Spring @PropertySources annotation is used to provide multiple properties files to Spring Environment. import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.PropertySource; import org.springframework.context.annotation.PropertySources; @Configuration @PropertySources({ @PropertySource("classpath:mail.properties"), @PropertySource("classpath:messages.properties") }) public class SpringConfig { } Conclusion In this tutorial, we discussed the usage of @PropertySource and @PropertySources annotations in Spring or Spring boot applications.

Related Spring and Spring Boot Annotations - Spring Boot @Bean Annotation Example - Spring @Qualifier Annotation Example - Spring @Autowired Annotation with Example - Spring @Bean Annotation with Example - Spring @Configuration Annotation with Example - Spring @PropertySource Annotation with Example - Spring @Import Annotation with Example - Spring @ImportResource Annotation Example - Spring - @Lazy Annotation Example - Spring - @Primary Annotation Example - Spring @PostConstruct and @PreDestroy Example - Spring @Repository Annotation - Spring @Service Annotation - The Spring @Controller and @RestController Annotations - Spring Boot @Component, @Controller, @Repository and @Service - Spring @Scope annotation with Prototype Scope Example - Spring @Scope annotation with Singleton Scope Example - Spring Boot @PathVariable - Spring Boot @ResponseBody - Spring @RequestBody - Binding Method Parameters to Request Body - Spring Boot @ResponseStatus Annotation - Spring Boot - Creating Asynchronous Methods using @Async Annotation - @SpringBootTest Spring Boot Example - @SpringBootTest vs @WebMvcTest - @DataJpaTest Spring Boot Example - Spring @PostConstruct and @PreDestroy Example - Spring @GetMapping, @PostMapping, @PutMapping, @DeleteMapping and @PatchMapping - Spring Boot @EnableAutoConfiguration Annotation with Example - Spring Boot @SpringBootApplication Annotation with Example My Top and Bestseller Udemy Courses.

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