|
此版本仍在开发中，尚未被视为稳定版本。对于最新的稳定版本，请使用 Spring Boot 3.4.3！ |
使用 @SpringBootApplication 注释
许多 Spring Boot 开发人员喜欢他们的应用程序使用自动配置、组件扫描，并能够在他们的“应用程序类”上定义额外的配置。
单个@SpringBootApplicationannotation 可以用来启用这三个功能，即：
-
@ComponentScan：使@ComponentScan 应用程序所在的软件包（请参阅最佳实践) -
@SpringBootConfiguration：启用在上下文中注册额外的 bean 或导入额外的配置类。 Spring 标准的替代方案@Configuration这有助于在集成测试中进行配置检测。
-
Java
-
Kotlin
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
// Same as @SpringBootConfiguration @EnableAutoConfiguration @ComponentScan
@SpringBootApplication
public class MyApplication {
public static void main(String[] args) {
SpringApplication.run(MyApplication.class, args);
}
}
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.runApplication
// same as @SpringBootConfiguration @EnableAutoConfiguration @ComponentScan
@SpringBootApplication
class MyApplication
fun main(args: Array<String>) {
runApplication<MyApplication>(*args)
}
@SpringBootApplication also provides aliases to customize the attributes of @EnableAutoConfiguration and @ComponentScan.
None of these features are mandatory and you may choose to replace this single annotation by any of the features that it enables.
For instance, you may not want to use component scan or configuration properties scan in your application:
-
Java
-
Kotlin
import org.springframework.boot.SpringApplication;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Import;
@SpringBootConfiguration(proxyBeanMethods = false)
@EnableAutoConfiguration
@Import({ SomeConfiguration.class, AnotherConfiguration.class })
public class MyApplication {
public static void main(String[] args) {
SpringApplication.run(MyApplication.class, args);
}
}
import org.springframework.boot.SpringBootConfiguration
import org.springframework.boot.autoconfigure.EnableAutoConfiguration
import org.springframework.boot.docs.using.structuringyourcode.locatingthemainclass.MyApplication
import org.springframework.boot.runApplication
import org.springframework.context.annotation.Import
@SpringBootConfiguration(proxyBeanMethods = false)
@EnableAutoConfiguration
@Import(SomeConfiguration::class, AnotherConfiguration::class)
class MyApplication
fun main(args: Array<String>) {
runApplication<MyApplication>(*args)
}
In this example, MyApplication is just like any other Spring Boot application except that @Component-annotated classes and @ConfigurationProperties-annotated classes are not detected automatically and the user-defined beans are imported explicitly (see @Import).