Example

core/src/main/java/com/duanledexianxianxian/core/SpringWebApplication.java

 package com.duanledexianxianxian.core;
 
 
+import com.duanledexianxianxian.core.config.SystemEnvironmentProperties;
 import com.duanledexianxianxian.core.config.SystemProperties;
+import com.duanledexianxianxian.core.config.SystemPropertySourceValueProperties;
+import com.duanledexianxianxian.core.config.SystemValueProperties;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.ApplicationContext;
 
 /**
  * springboot 应用程序入口
+ *
  * @author duanledexianxianxian
  */
 @SpringBootApplication
 public class SpringWebApplication {
 
     public static void main(String[] args) {
-        ApplicationContext applicationContext= (ApplicationContext) SpringApplication.run(SpringWebApplication.class, args);
-        SystemProperties properties=applicationContext.getBean(SystemProperties.class);
-        System.out.println("用户的当前工作目录:"+System.getProperty("user.dir"));
-        // 打印出配置参数
-        System.out.println(properties.getName());
+        ApplicationContext applicationContext =
+                SpringApplication.run(SpringWebApplication.class, args);
+        SystemProperties systemProperties = applicationContext.getBean(SystemProperties.class);
+        SystemValueProperties valueProperties = applicationContext.getBean(SystemValueProperties.class);
+        SystemEnvironmentProperties environmentProperties = applicationContext.getBean(SystemEnvironmentProperties.class);
+        SystemPropertySourceValueProperties propertySourceValueProperties = applicationContext.getBean(SystemPropertySourceValueProperties.class);
+
+        System.out.println("用户的当前工作目录:" + System.getProperty("user.dir"));
+        // 通过@value加载配置方式
+        System.out.println("@Value:" + valueProperties);
+        System.out.println("@ConfigurationProperties:" + systemProperties);
+        System.out.println("Environment:" + environmentProperties.getEnvironment().getProperty("system.name"));
+        System.out.println("@PropertySource+@Value+@ConfigurationProperties:" + propertySourceValueProperties);
 
     }
 

core/src/main/java/com/duanledexianxianxian/core/config/SystemEnvironmentProperties.java

+package com.duanledexianxianxian.core.config;
+
+import lombok.Data;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+/**
+ * 通过Environment加载配置参数
+ * @author duanledexianxianxian
+ */
+@Component
+@Data
+public class SystemEnvironmentProperties {
+    @Autowired
+    private Environment environment;
+}

core/src/main/java/com/duanledexianxianxian/core/config/SystemPropertySourceValueProperties.java

+package com.duanledexianxianxian.core.config;
+
+import lombok.Data;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.stereotype.Component;
+
+/**
+ * 通过@value加载配置参数
+ * @author duanledexianxianxian
+ */
+@Component
+@ConfigurationProperties(prefix = "system.property")
+@PropertySource(value = { "/config/system.properties" })
+@Data
+public class SystemPropertySourceValueProperties {
+    /**
+     * 名称
+     * //最好设置默认值，否则配置文件即使有相应key，也会应用启动失败
+     */
+    @Value("${name:null}")
+    private String name;
+    /**
+     * 编码
+     * //最好设置默认值，否则配置文件即使有相应key，也会应用启动失败
+     */
+    @Value("${code:null}")
+    private String code;
+}

core/src/main/java/com/duanledexianxianxian/core/config/SystemValueProperties.java

+package com.duanledexianxianxian.core.config;
+
+import lombok.Data;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+/**
+ * 通过@value加载配置参数
+ * @author duanledexianxianxian
+ */
+@Component
+@Data
+public class SystemValueProperties {
+    /**
+     * 名称
+     */
+    @Value("${system.name}")
+    private String name;
+    /**
+     * 编码
+     */
+    @Value("${system.code}")
+    private String code;
+}

core/src/main/resources/application.yml

 server:
   port: 8080
 
+#系统相关配置
 system:
+#  系统名称
   name: "classpath root config"
+#  系统编码
+  code: "classpath root code"
\ No newline at end of file

core/src/main/resources/config/system.properties

+system.property.name=\u7CFB\u7EDF\u540D\u79F0
+system.property.code=\u7CFB\u7EDF\u7F16\u7801
+#name=ssss
+#code=ssss
\ No newline at end of file