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深入学习Spring Boot自动装配

This commit is contained in:
mrbird 2019-03-13 18:26:26 +08:00
parent 0e24aae0ca
commit f620991fb0
15 changed files with 240 additions and 0 deletions
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43
44.Spring-Boot-Autoconfiguration/pom.xml Normal file
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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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>autoconfig</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

13
44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/DemoApplication.java Normal file
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package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}

17
44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/annotation/EnableHelloWorld.java Normal file
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package com.example.demo.annotation;
import com.example.demo.configuration.HelloWorldConfiguration;
import org.springframework.context.annotation.Import;
import java.lang.annotation.*;
/**
* @author MrBird
*/
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
// @Import(HelloWorldImportSelector.class)
@Import(HelloWorldConfiguration.class)
public @interface EnableHelloWorld {
}

14
44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/annotation/FirstLevelService.java Normal file
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package com.example.demo.annotation;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import java.lang.annotation.*;
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Service
public @interface FirstLevelService {
String value() default "";
}

11
44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/annotation/SecondLevelService.java Normal file
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package com.example.demo.annotation;
import java.lang.annotation.*;
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@FirstLevelService
public @interface SecondLevelService {
String value() default "";
}

22
44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/bootstrap/EnableAutoConfigurationBootstrap.java Normal file
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package com.example.demo.bootstrap;
import org.springframework.boot.WebApplicationType;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.ConfigurableApplicationContext;
/**
* @author MrBird
*/
@EnableAutoConfiguration
public class EnableAutoConfigurationBootstrap {
public static void main(String[] args) {
ConfigurableApplicationContext context = new SpringApplicationBuilder(EnableAutoConfigurationBootstrap.class)
.web(WebApplicationType.NONE)
.run(args);
String hello = context.getBean("hello", String.class);
System.out.println("hello Bean: " + hello);
context.close();
}
}

23
44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/bootstrap/ServiceBootstrap.java Normal file
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package com.example.demo.bootstrap;
import com.example.demo.service.TestService;
import org.springframework.boot.WebApplicationType;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.ComponentScan;
/**
* @author MrBird
*/
@ComponentScan("com.example.demo.service")
public class ServiceBootstrap {
public static void main(String[] args) {
ConfigurableApplicationContext context = new SpringApplicationBuilder(ServiceBootstrap.class)
.web(WebApplicationType.NONE)
.run(args);
TestService testService = context.getBean("testService", TestService.class);
System.out.println("TestService Bean: " + testService);
context.close();
}
}

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44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/bootstrap/TestEnableBootstap.java Normal file
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package com.example.demo.bootstrap;
import com.example.demo.annotation.EnableHelloWorld;
import org.springframework.boot.WebApplicationType;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.ConfigurableApplicationContext;
/**
* @author MrBird
*/
@EnableHelloWorld
public class TestEnableBootstap {
public static void main(String[] args) {
ConfigurableApplicationContext context = new SpringApplicationBuilder(TestEnableBootstap.class)
.web(WebApplicationType.NONE)
.run(args);
String hello = context.getBean("hello", String.class);
System.out.println("hello Bean: " + hello);
context.close();
}
}

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44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/configuration/HelloWorldAutoConfiguration.java Normal file
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package com.example.demo.configuration;
import com.example.demo.annotation.EnableHelloWorld;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Configuration;
/**
* @author MrBird
*/
@Configuration
@EnableHelloWorld
@ConditionalOnProperty(name = "helloworld", havingValue = "true")
public class HelloWorldAutoConfiguration {
}

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44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/configuration/HelloWorldConfiguration.java Normal file
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package com.example.demo.configuration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* @author MrBird
*/
@Configuration
public class HelloWorldConfiguration {
@Bean
public String hello() {
return "hello world";
}
}

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44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/selector/HelloWorldImportSelector.java Normal file
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package com.example.demo.selector;
import com.example.demo.configuration.HelloWorldConfiguration;
import org.springframework.context.annotation.ImportSelector;
import org.springframework.core.type.AnnotationMetadata;
/**
* @author MrBird
*/
public class HelloWorldImportSelector implements ImportSelector {
@Override
public String[] selectImports(AnnotationMetadata importingClassMetadata) {
return new String[]{HelloWorldConfiguration.class.getName()};
}
}

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44.Spring-Boot-Autoconfiguration/src/main/java/com/example/demo/service/TestService.java Normal file
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package com.example.demo.service;
import com.example.demo.annotation.FirstLevelService;
import com.example.demo.annotation.SecondLevelService;
/**
* @author MrBird
*/
@SecondLevelService
public class TestService {
}

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44.Spring-Boot-Autoconfiguration/src/main/resources/META-INF/spring.factories Normal file
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# Auto Configure
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.example.demo.configuration.HelloWorldAutoConfiguration

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44.Spring-Boot-Autoconfiguration/src/main/resources/application.properties Normal file
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helloworld=true

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44.Spring-Boot-Autoconfiguration/src/test/java/com/example/demo/DemoApplicationTests.java Normal file
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package com.example.demo;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {
@Test
public void contextLoads() {
}
}