（012）Spring Boot之改变SpringBootApplication注解默认扫描路径 _Application

大道之行，天下为公。这篇文章主要讲述（012）Spring Boot之改变SpringBootApplication注解默认扫描路径相关的知识，希望能为你提供帮助。
SpringBootApplication默认扫描当前包以及子包的所有类，如下所示，SpringBootApplication 注解与User在同一级，无法获取User的bean：
pom.xml

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< ?xml version="1.0" encoding="UTF-8"?> < project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> < modelVersion> 4.0.0< /modelVersion> < groupId> com.edu.spring< /groupId> < artifactId> springboot< /artifactId> < version> 1.0.0< /version> < packaging> jar< /packaging> < name> springboot< /name> < !-- FIXME change it to the project\'s website --> < url> http://www.example.com< /url> < dependencyManagement> < dependencies> < dependency> < groupId> org.springframework.boot< /groupId> < artifactId> spring-boot-dependencies< /artifactId> < version> 2.1.6.RELEASE< /version> < scope> import< /scope> < type> pom< /type> < /dependency> < /dependencies> < /dependencyManagement> < 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> < /properties> < dependencies> < dependency> < groupId> org.springframework.boot< /groupId> < artifactId> spring-boot-starter< /artifactId> < /dependency> < /dependencies> < /project>

View CodeUser.java

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package com.edu.spring.user; import org.springframework.stereotype.Component; @Component public class User {}

View CodeApp.java

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package com.edu.spring.springboot; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.ConfigurableApplicationContext; import com.edu.spring.user.User; @SpringBootApplication public class App {public static void main( String[] args) { SpringApplication app=new SpringApplication(App.class); ConfigurableApplicationContext context= app.run(args); System.out.println(context.getBean(User.class)); context.close(); } }

View Code目录结构：

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运行结果如下：

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可以通过scanBasePackages指定扫描路径
App.java，修改为@SpringBootApplication(scanBasePackages={"com.edu.spring"})

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package com.edu.spring.springboot; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.ConfigurableApplicationContext; import com.edu.spring.user.User; @SpringBootApplication(scanBasePackages={"com.edu.spring"}) public class App {public static void main( String[] args) { SpringApplication app=new SpringApplication(App.class); ConfigurableApplicationContext context= app.run(args); System.out.println(context.getBean(User.class)); context.close(); } }

View Code运行结果如下：

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exclude和excludeName可以排除掉要扫描的类，如下将不会获取User的bean：
【（012）Spring Boot之改变SpringBootApplication注解默认扫描路径】@SpringBootApplication(scanBasePackages={"com.edu.spring"},exclude=User.class)
@SpringBootApplication(scanBasePackages={"com.edu.spring"},excludeName="com.edu.spring.user.User")