Spring Boot(一)
1、注解
@EnableAutoConfiguration官方文档:The
@EnableAutoConfigurationannotation is often placed on your main class, and it implicitly defines a base “search package” for certain items. For example, if you are writing a JPA application, the package of the@EnableAutoConfigurationannotated class will be used to search for@Entityitems.@EnableAutoConfiguration通常用在主类上,它隐含地定义了某些项目的基本“搜索包”。如果您正在编写JPA应用程序,则@EnableAutoConfiguration注释类的包将用于搜索@Entity项。
官方文档:You should only ever add one@EnableAutoConfigurationannotation. We generally recommend that you add it to your primary@Configurationclass
您应该只添加一个@EnableAutoConfiguration注释。我们通常建议您将其添加到主要的@Configuration类中。@Configuration
如果需要在启动SpringApplication.run()时,需要加载xml文件,官方建议在main方法的类上加上该注解。也可以在多个类上使用该注解。@Import注解可以导入配置类,另外使用@ComponentScan注解可以自动装载所有spring组件,包括@Configuration注解的类。-
@ImportResource
加载xml文件 @ComponentScan
自动扫描装载spring组件,比如(@Component,@Service,@Repository,@Controlleretc.)
@SpringBootApplication
使用@SpringBootApplication注释相当于使用@Configuration,@EnableAutoConfiguration和@ComponentScan及其默认属性:
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); } }

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