BAEL-4106 (#9887)

* BAEL-4106
application.yml vs application.properties for Spring Boot

* Update README.md

spring-boot-modules/spring-boot-properties-3/README.md

@@ -1,3 +1,9 @@
+
+## Spring Boot Properties
+
+
+
 ### Relevant Articles:
 
 - [How to Define a Map in YAML for a POJO?](https://www.baeldung.com/yaml-map-pojo)
+

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

@@ -17,13 +17,11 @@
     <properties>
         <java.version>1.8</java.version>
     </properties>
-
     <dependencies>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
@@ -50,5 +48,4 @@
             </plugin>
         </plugins>
     </build>
-
 </project>

spring-boot-modules/spring-boot-properties-3/src/main/java/com/baeldung/propertiesvsyaml/ConfigProperties.java

@@ -0,0 +1,27 @@
+package com.baeldung.propertiesvsyaml;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+
+@ConfigurationProperties(prefix = "app")
+public class ConfigProperties {
+
+    String name;
+    String description;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+}

spring-boot-modules/spring-boot-properties-3/src/main/java/com/baeldung/propertiesvsyaml/EnvironmentProperties.java

@@ -0,0 +1,16 @@
+package com.baeldung.propertiesvsyaml;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Component
+public class EnvironmentProperties {
+
+    @Autowired
+    private Environment env;
+
+    public String getSomeKey() {
+        return env.getProperty("key.something");
+    }
+}

spring-boot-modules/spring-boot-properties-3/src/main/java/com/baeldung/propertiesvsyaml/ValueProperties.java

@@ -0,0 +1,13 @@
+package com.baeldung.propertiesvsyaml;
+
+import org.springframework.beans.factory.annotation.Value;
+
+public class ValueProperties {
+
+    @Value("${key.something}")
+    private String injectedProperty;
+
+    public String getAppName() {
+        return injectedProperty;
+    }
+}

spring-boot-modules/spring-boot-properties-3/src/main/resources/application.properties

@@ -0,0 +1,11 @@
+application.servers[0].ip=127.0.0.1
+application.servers[0].path=/path1
+application.servers[1].ip=127.0.0.2
+application.servers[1].path=/path2
+application.servers[2].ip=127.0.0.3
+application.servers[2].path=/path3
+spring.datasource.url=jdbc:h2:dev
+spring.datasource.username=SA
+spring.datasource.password=password
+app.name=MyApp
+app.description=${app.name} is a Spring Boot application

spring-boot-modules/spring-boot-properties-3/src/main/resources/application.yml

@@ -1,3 +1,25 @@
+logging:
+  file:
+    name: myapplication.log
+spring:
+  datasource:
+    password: 'password'
+    url: jdbc:h2:dev
+    username: SA
+---
+spring:
+  datasource:
+    password: 'password'
+    url: jdbc:mysql://localhost:3306/db_production
+    username: user
+application:
+  servers:
+    -   ip: '127.0.0.1'
+        path: '/path1'
+    -   ip: '127.0.0.2'
+        path: '/path2'
+    -   ip: '127.0.0.3'
+        path: '/path3'
   t-shirt-size:
     simple-mapping:
       XS: 6