Update 18. Using the @SpringBootApplication annotation.md

III. Using Spring Boot/18. Using the @SpringBootApplication annotation.md

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+### 18. 使用@SpringBootApplication注解
+
+很多Spring Boot开发者总是使用`@Configuration`，`@EnableAutoConfiguration`和`@ComponentScan`注解他们的main类。由于这些注解被如此频繁地一块使用（特别是你遵循以上[最佳实践](http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#using-boot-structuring-your-code)时），Spring Boot提供一个方便的`@SpringBootApplication`选择。
+
+该`@SpringBootApplication`注解等价于以默认属性使用`@Configuration`，`@EnableAutoConfiguration`和`@ComponentScan`。
+```java
+package com.example.myproject;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication // same as @Configuration @EnableAutoConfiguration @ComponentScan
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+}
+```