springboot 快速入门
Springboot的环境搭建
1、继承
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.0.RELEASE</version>
</parent>
2、配置
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>1.4.0.RELEASE</version>
<scope>import</scope>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
配置编码格式、编译器版本
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
maven依赖
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>
<version>3.5.0</version>
</dependency>
Springboot依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
Springboot的两种运行方式
1、使用SpringApplication经典方法SpringApplication.run()
@SpringBootApplication
public class App {
@Bean
public Runnable createRunnable() {
return ()->{System.out.println("SpringBoot is run");};
}
public static void main(String[] args) {
ConfigurableApplicationContext context=SpringApplication.run(App.class, args);
context.getBean(Runnable.class).run();
context.getBean(User.class);
}
}
2、创建一个SpringApplication对象，调用它的run方法
public class App {
public static void main(String[] args) {
SpringApplication app=new SpringApplication(App2.class);
Set<Object> set=new HashSet<>(); //装载多个
set.add(App3.class );
set.add(App2.class );
app.setSources(set);
ConfigurableApplicationContext context=app.run(args);
context.getBean(Runnable.class).run();
System.out.println(context.getBean(User.class));
}
}
其中@SpringBootApplication包含以下功能
@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan(excludeFilters={@Filter(type=CUSTOM, classes={TypeExcludeFilter.class})})
@Target(value={TYPE})
@Retention(value=RUNTIME)
@Documented
@Inherited