use Placeholder

src/main/java/ru/dmitriymx/plugin/BanHammerPlugin.java

@@ -5,6 +5,8 @@ import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import ru.dmitriymx.plugin.command.BanCommand;
 import ru.dmitriymx.plugin.command.UnbanCommand;
+import ru.dmitriymx.plugin.config.BukkitYamlPlaceholderConfigurer;
+import ru.dmitriymx.plugin.config.SpringConfig;
 
 import java.util.logging.Logger;
 
@@ -13,8 +15,13 @@ public class BanHammerPlugin extends JavaPlugin {
 
 	@Override
 	public void onEnable() {
+		this.saveDefaultConfig();
+
 		ApplicationContext context = createSpringContext();
 
+		//TODO для демонстрации
+		getLogger().info("dburl: " + context.getBean("databaseUrl", String.class));
+
 		this.getCommand("ban").setExecutor(context.getBean(BanCommand.class));
 		this.getCommand("unban").setExecutor(context.getBean(UnbanCommand.class));
 	}
@@ -22,6 +29,7 @@ public class BanHammerPlugin extends JavaPlugin {
 	private ApplicationContext createSpringContext() {
 		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
 		context.setClassLoader(this.getClassLoader());
+		context.addBeanFactoryPostProcessor(new BukkitYamlPlaceholderConfigurer(this.getConfig()));
 		context.registerBean("bukkitLogger", Logger.class, this::getLogger);
 		context.register(SpringConfig.class);
 		context.refresh();

src/main/java/ru/dmitriymx/plugin/SpringConfig.java

@@ -1,10 +0,0 @@
-package ru.dmitriymx.plugin;
-
-import org.springframework.context.annotation.ComponentScan;
-import org.springframework.context.annotation.Configuration;
-
-@Configuration
-@ComponentScan("ru.dmitriymx.plugin")
-public class SpringConfig {
-
-}

src/main/java/ru/dmitriymx/plugin/config/BukkitYamlPlaceholderConfigurer.java

@@ -0,0 +1,23 @@
+package ru.dmitriymx.plugin.config;
+
+import org.bukkit.configuration.file.FileConfiguration;
+import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
+
+import java.util.Optional;
+import java.util.Properties;
+
+@SuppressWarnings("deprecation")
+public class BukkitYamlPlaceholderConfigurer extends PropertyPlaceholderConfigurer {
+
+	private final FileConfiguration fileConfiguration;
+
+	public BukkitYamlPlaceholderConfigurer(FileConfiguration fileConfiguration) {
+		this.fileConfiguration = fileConfiguration;
+	}
+
+	@Override
+	protected String resolvePlaceholder(String placeholder, Properties props) {
+		return Optional.ofNullable(fileConfiguration.getString(placeholder))
+				.orElseGet(() -> super.resolvePlaceholder(placeholder, props));
+	}
+}

src/main/java/ru/dmitriymx/plugin/config/SpringConfig.java

@@ -0,0 +1,26 @@
+package ru.dmitriymx.plugin.config;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan("ru.dmitriymx.plugin")
+public class SpringConfig {
+
+	@Value("${database.url}")
+	private String databaseUrl;
+
+	@Value("${database.user}")
+	private String databaseUser;
+
+	@Value("${database.password}")
+	private String databasePassword;
+
+	//TODO для демонстрации
+	@Bean("databaseUrl")
+	public String getDatabaseUrl() {
+		return databaseUrl;
+	}
+}

src/main/resources/config.yml

@@ -0,0 +1,4 @@
+database:
+  url: some-url
+  user: some-user
+  password: some-password