JAVA-18600 Update "Guide to @ConfigurationProperties in Spring Boot" … (#13670)

* JAVA-18600 Update "Guide to @ConfigurationProperties in Spring Boot" article

---------

Co-authored-by: timis1 <noreplay@yahoo.com>

spring-boot-modules/pom.xml

@@ -63,10 +63,6 @@
         <module>spring-boot-nashorn</module>
         <module>spring-boot-parent</module>
         <module>spring-boot-performance</module>
-        <module>spring-boot-properties</module>
-        <module>spring-boot-properties-2</module>
-        <module>spring-boot-properties-3</module>
-        <module>spring-boot-properties-migrator-demo</module>
         <module>spring-boot-property-exp</module>
         <module>spring-boot-request-params</module>
         <module>spring-boot-runtime</module>
@@ -94,6 +90,10 @@
         <module>spring-boot-3-observation</module>
         <module>spring-boot-3-test-pitfalls</module>
         <module>spring-boot-resilience4j</module>
+        <module>spring-boot-properties</module>
+        <module>spring-boot-properties-2</module>
+        <module>spring-boot-properties-3</module>
+        <module>spring-boot-properties-migrator-demo</module>
     </modules>
 
     <dependencyManagement>

spring-boot-modules/spring-boot-properties-2/pom.xml

@@ -10,9 +10,10 @@
     <description>Spring Boot Properties Module</description>
 
     <parent>
-        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <groupId>com.baeldung</groupId>
-        <artifactId>spring-boot-modules</artifactId>
+        <artifactId>parent-boot-3</artifactId>
-        <version>1.0.0-SNAPSHOT</version>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>
@@ -24,6 +25,15 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
+        <dependency>
+            <groupId>commons-lang</groupId>
+            <artifactId>commons-lang</artifactId>
+            <version>2.6</version>
+        </dependency>
     </dependencies>
 
+    <properties>
+        <start-class>com.baeldung.properties.yaml.YamlApplication</start-class>
+    </properties>
+
 </project>

spring-boot-modules/spring-boot-properties-2/src/main/java/com/baeldung/properties/value/ValuesApp.java

@@ -7,11 +7,12 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.PropertySource;
 
-import javax.annotation.PostConstruct;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
+import jakarta.annotation.PostConstruct;
+
 @Configuration
 @PropertySource(name = "myProperties", value = "values.properties")
 public class ValuesApp {

spring-boot-modules/spring-boot-properties-2/src/main/java/com/baeldung/properties/value/defaults/ValuesWithDefaultsApp.java

@@ -1,6 +1,6 @@
 package com.baeldung.properties.value.defaults;
 
-import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang.ArrayUtils;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
@@ -8,10 +8,11 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.PropertySource;
 import org.springframework.util.Assert;
 
-import javax.annotation.PostConstruct;
 import java.util.Arrays;
 import java.util.List;
 
+import jakarta.annotation.PostConstruct;
+
 /**
  * Demonstrates setting defaults for @Value annotation.  Note that there are no properties 
  * defined in the specified property source.  We also assume that the user here
@@ -60,10 +61,10 @@ public class ValuesWithDefaultsApp {
     	
     	// arrays
         List<String> stringListValues = Arrays.asList("one", "two", "three");
-    	Assert.isTrue(Arrays.asList(stringArrayWithDefaults).containsAll(stringListValues), "unexpected value for stringArrayWithDefaults");
+        Assert.isTrue(Arrays.asList(stringArrayWithDefaults).containsAll(stringListValues), "unexpected value for stringArrayWithDefaults");
 
         List<Integer> intListValues = Arrays.asList(1, 2, 3);
-    	Assert.isTrue(Arrays.asList(ArrayUtils.toObject(intArrayWithDefaults)).containsAll(intListValues), "unexpected value for intArrayWithDefaults");
+        Assert.isTrue(Arrays.asList(ArrayUtils.toObject(intArrayWithDefaults)).containsAll(intListValues), "unexpected value for intArrayWithDefaults");
 
     	// SpEL
     	Assert.isTrue(spelWithDefaultValue.equals("my default system property value"), "unexpected value for spelWithDefaultValue");

spring-boot-modules/spring-boot-properties-3/pom.xml

@@ -9,9 +9,10 @@
     <description>Spring Boot Properties Module</description>
 
     <parent>
-        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <groupId>com.baeldung</groupId>
-        <artifactId>spring-boot-modules</artifactId>
+        <artifactId>parent-boot-3</artifactId>
-        <version>1.0.0-SNAPSHOT</version>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>
@@ -31,7 +32,6 @@
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
-            <version>RELEASE</version>
         </dependency>
     </dependencies>
 
@@ -44,4 +44,8 @@
         </plugins>
     </build>
 
+    <properties>
+        <start-class>com.baeldung.boot.properties.DemoApplication</start-class>
+    </properties>
+
 </project>

spring-boot-modules/spring-boot-properties-3/src/main/java/com/baeldung/properties/log/EnvironmentPropertiesPrinter.java

@@ -5,7 +5,7 @@ import org.slf4j.LoggerFactory;
 import org.springframework.core.env.Environment;
 import org.springframework.stereotype.Component;
 
-import javax.annotation.PostConstruct;
+import jakarta.annotation.PostConstruct;
 
 @Component
 public class EnvironmentPropertiesPrinter {

spring-boot-modules/spring-boot-properties-migrator-demo/pom.xml

@@ -7,10 +7,10 @@
     <version>1.0-SNAPSHOT</version>
 
     <parent>
-        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <groupId>com.baeldung</groupId>
-        <artifactId>spring-boot-modules</artifactId>
+        <artifactId>parent-boot-3</artifactId>
-        <version>1.0.0-SNAPSHOT</version>
+        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../pom.xml</relativePath>
+        <relativePath>../../parent-boot-3</relativePath>
     </parent>
     <!-- Used to demonstrate a particular scenario in the article -->
     <!-- <parent> -->
@@ -49,8 +49,8 @@
     </build>
 
     <properties>
-        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.source>17</maven.compiler.source>
-        <maven.compiler.target>8</maven.compiler.target>
+        <maven.compiler.target>17</maven.compiler.target>
     </properties>
 
 </project>

spring-boot-modules/spring-boot-properties/pom.xml

@@ -10,9 +10,10 @@
     <description>Spring Boot Properties Module</description>
 
     <parent>
-        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <groupId>com.baeldung</groupId>
-        <artifactId>spring-boot-modules</artifactId>
+        <artifactId>parent-boot-3</artifactId>
-        <version>1.0.0-SNAPSHOT</version>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>
@@ -141,7 +142,7 @@
     </profiles>
 
     <properties>
-        <spring-cloud.version>2021.0.3</spring-cloud.version>
+        <spring-cloud.version>2022.0.1</spring-cloud.version>
         <commons-configuration.version>1.10</commons-configuration.version>
         <resource.delimiter>@</resource.delimiter>
         <!-- <start-class>com.baeldung.buildproperties.Application</start-class> -->

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configurationproperties/ConfigProperties.java

@@ -3,10 +3,10 @@ package com.baeldung.configurationproperties;
 import java.util.List;
 import java.util.Map;
 
-import javax.validation.constraints.Max;
+import jakarta.validation.constraints.Max;
-import javax.validation.constraints.Min;
+import jakarta.validation.constraints.Min;
-import javax.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotBlank;
-import javax.validation.constraints.Pattern;
+import jakarta.validation.constraints.Pattern;
 
 import org.hibernate.validator.constraints.Length;
 import org.springframework.boot.context.properties.ConfigurationProperties;

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configurationproperties/ImmutableCredentials.java

@@ -1,10 +1,8 @@
 package com.baeldung.configurationproperties;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
-import org.springframework.boot.context.properties.ConstructorBinding;
 
 @ConfigurationProperties(prefix = "mail.credentials")
-@ConstructorBinding
 public class ImmutableCredentials {
 
     private final String authMethod;

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

@@ -4,12 +4,9 @@ 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 {
 

spring-boot-modules/spring-boot-properties/src/test/java/com/baeldung/buildproperties/BuildPropertiesUnitTest.java

@@ -17,7 +17,7 @@ public class BuildPropertiesUnitTest {
     @Test
     void givenBuildPropertiesBean_WhenFetchDefaultBuildProperties_ThenGetValidValues() {
         Assertions.assertEquals("spring-boot-properties", buildProperties.getArtifact());
-        Assertions.assertEquals("com.baeldung.spring-boot-modules", buildProperties.getGroup());
+        Assertions.assertEquals("com.baeldung", buildProperties.getGroup());
         Assertions.assertEquals("0.0.1-SNAPSHOT", buildProperties.getVersion());
     }
 

spring-boot-modules/spring-boot-properties/src/test/java/com/baeldung/properties/reloading/PropertiesReloadManualTest.java

@@ -1,28 +1,27 @@
 package com.baeldung.properties.reloading;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 import com.baeldung.properties.reloading.beans.ConfigurationPropertiesRefreshConfigBean;
 import com.baeldung.properties.reloading.beans.EnvironmentConfigBean;
 import com.baeldung.properties.reloading.beans.PropertiesConfigBean;
 import com.baeldung.properties.reloading.beans.ValueRefreshConfigBean;
 import java.io.FileOutputStream;
-import org.junit.After;
+
-import org.junit.Assert;
+import org.junit.jupiter.api.AfterEach;
-import org.junit.Before;
+import org.junit.jupiter.api.BeforeEach;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
-import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.http.MediaType;
 import org.springframework.mock.web.MockHttpServletResponse;
-import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.MvcResult;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
 import org.springframework.test.web.servlet.setup.MockMvcBuilders;
 import org.springframework.web.context.WebApplicationContext;
 
-@RunWith(SpringJUnit4ClassRunner.class)
 @SpringBootTest(classes = SpringBootPropertiesTestApplication.class)
 public class PropertiesReloadManualTest {
 
@@ -50,7 +49,7 @@ public class PropertiesReloadManualTest {
     ValueRefreshConfigBean singletonValueRefreshConfigBean;
 
 
-    @Before
+    @BeforeEach
     public void setUp() throws Exception {
         mvc = MockMvcBuilders
           .webAppContextSetup(webApplicationContext)
@@ -61,7 +60,7 @@ public class PropertiesReloadManualTest {
         callRefresh();
     }
 
-    @After
+    @AfterEach
     public void tearDown() throws Exception {
         createConfig("extra.properties", "application.theme.color", "blue");
         createConfig("extra2.properties", "application.theme.background", "red");
@@ -69,76 +68,76 @@ public class PropertiesReloadManualTest {
 
     @Test
     public void givenEnvironmentReader_whenColorChanged_thenExpectChangeValue() throws Exception {
-        Assert.assertEquals("blue", environmentConfigBean.getColor());
+        assertEquals("blue", environmentConfigBean.getColor());
 
         createConfig("extra.properties", "application.theme.color", "red");
         Thread.sleep(refreshDelay);
 
-        Assert.assertEquals("red", environmentConfigBean.getColor());
+        assertEquals("red", environmentConfigBean.getColor());
     }
 
     @Test
     public void givenEnvironmentReader_whenBackgroundChanged_thenExpectChangeValue() throws Exception {
-        Assert.assertEquals("red", environmentConfigBean.getBackgroundColor());
+        assertEquals("red", environmentConfigBean.getBackgroundColor());
 
         createConfig("extra2.properties", "application.theme.background", "blue");
         Thread.sleep(refreshDelay);
 
-        Assert.assertEquals("blue", environmentConfigBean.getBackgroundColor());
+        assertEquals("blue", environmentConfigBean.getBackgroundColor());
     }
 
     @Test
     public void givenPropertiesReader_whenColorChanged_thenExpectChangeValue() throws Exception {
-        Assert.assertEquals("blue", propertiesConfigBean.getColor());
+        assertEquals("blue", propertiesConfigBean.getColor());
 
         createConfig("extra.properties", "application.theme.color", "red");
         Thread.sleep(refreshDelay);
 
-        Assert.assertEquals("red", propertiesConfigBean.getColor());
+        assertEquals("red", propertiesConfigBean.getColor());
     }
 
     @Test
     public void givenRefreshScopedValueReader_whenColorChangedAndRefreshCalled_thenExpectChangeValue() throws Exception {
-        Assert.assertEquals("blue", valueRefreshConfigBean.getColor());
+        assertEquals("blue", valueRefreshConfigBean.getColor());
 
         createConfig("extra.properties", "application.theme.color", "red");
         Thread.sleep(refreshDelay);
 
-        Assert.assertEquals("blue", valueRefreshConfigBean.getColor());
+        assertEquals("blue", valueRefreshConfigBean.getColor());
 
         callRefresh();
 
-        Assert.assertEquals("red", valueRefreshConfigBean.getColor());
+        assertEquals("red", valueRefreshConfigBean.getColor());
     }
 
     @Test
     public void givenSingletonRefreshScopedValueReader_whenColorChangedAndRefreshCalled_thenExpectOldValue() throws Exception {
 
-        Assert.assertEquals("blue", singletonValueRefreshConfigBean.getColor());
+        assertEquals("blue", singletonValueRefreshConfigBean.getColor());
 
         createConfig("extra.properties", "application.theme.color", "red");
         Thread.sleep(refreshDelay);
 
-        Assert.assertEquals("blue", singletonValueRefreshConfigBean.getColor());
+        assertEquals("blue", singletonValueRefreshConfigBean.getColor());
 
         callRefresh();
 
-        Assert.assertEquals("blue", singletonValueRefreshConfigBean.getColor());
+        assertEquals("blue", singletonValueRefreshConfigBean.getColor());
     }
 
     @Test
     public void givenRefreshScopedConfigurationPropertiesReader_whenColorChangedAndRefreshCalled_thenExpectChangeValue() throws Exception {
 
-        Assert.assertEquals("blue", configurationPropertiesRefreshConfigBean.getColor());
+        assertEquals("blue", configurationPropertiesRefreshConfigBean.getColor());
 
         createConfig("extra.properties", "application.theme.color", "red");
         Thread.sleep(refreshDelay);
 
-        Assert.assertEquals("blue", configurationPropertiesRefreshConfigBean.getColor());
+        assertEquals("blue", configurationPropertiesRefreshConfigBean.getColor());
 
         callRefresh();
 
-        Assert.assertEquals("red", configurationPropertiesRefreshConfigBean.getColor());
+        assertEquals("red", configurationPropertiesRefreshConfigBean.getColor());
     }
 
     public void callRefresh() throws Exception {
@@ -148,7 +147,7 @@ public class PropertiesReloadManualTest {
             .accept(MediaType.APPLICATION_JSON_VALUE))
           .andReturn();
         MockHttpServletResponse response = mvcResult.getResponse();
-        Assert.assertEquals(response.getStatus(), 200);
+        assertEquals(200, response.getStatus());
     }
 
     public void createConfig(String file, String key, String value) throws Exception {