BAEL-3499 Added files for article (#8498)

spring-boot/src/main/java/com/baeldung/buildproperties/Application.java

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+package com.baeldung.buildproperties;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.PropertySource;
+
+@SpringBootApplication
+@ComponentScan(basePackages = "com.baeldung.buildproperties")
+@PropertySource("classpath:build.properties")
+//@PropertySource("classpath:build.yml")
+public class Application {
+    
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+    
+}

spring-boot/src/main/java/com/baeldung/buildproperties/BuildInfoService.java

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+package com.baeldung.buildproperties;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+@Service
+public class BuildInfoService {
+    @Value("${application-description}")
+    private String applicationDescription;
+    
+    @Value("${application-version}")
+    private String applicationVersion;
+
+    public String getApplicationDescription() {
+        return applicationDescription;
+    }
+
+    public String getApplicationVersion() {
+        return applicationVersion;
+    }
+}

spring-boot/src/main/resources/build.properties

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+application-description=@project.description@
+application-version=@project.version@

spring-boot/src/main/resources/build.yml

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+application-description: ^project.description^
+application-version: ^project.version^

spring-boot/src/test/java/com/baeldung/buildproperties/BuildInfoServiceIntegrationTest.java

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+package com.baeldung.buildproperties;
+
+import static org.junit.Assert.assertThat;
+
+import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = Application.class)
+class BuildInfoServiceIntegrationTest {
+
+    @Autowired
+    private BuildInfoService service;
+    
+    @Test
+    void whenGetApplicationDescription_thenSuccess() {
+        assertThat(service.getApplicationDescription(), Matchers.is("This is simple boot application for Spring boot actuator test"));
+        assertThat(service.getApplicationVersion(), Matchers.is("0.0.1-SNAPSHOT"));
+    }
+}