├── .gitignore ├── LICENSE ├── README.md ├── pom.xml ├── q&a ├── 36. 自动装配的补充.jpg └── 自动装配.md └── src └── main └── java ├── com └── example │ └── demo │ └── DemoApplication.java └── example ├── aop └── DemoAspect.java ├── conditional ├── App.java ├── ColorConditional.java └── ColorConfiguration.java ├── config ├── App.java └── ConfigurationDemo.java ├── customizer └── WebMvcCustomizer.java ├── enablexxx ├── App.java ├── Black.java ├── Blue.java ├── ColorConfiguration.java ├── ColorImportBeanDefinitionRegistrar.java ├── ColorImportSelector.java ├── ColorRegistrarConfiguration.java ├── EnableColor.java ├── Green.java ├── Red.java └── Yellow.java ├── init ├── Cat.java └── CatBeanPostProcessor.java ├── servlet ├── DemoServlet.java ├── DemoServletRegistryBean.java └── ServletConfiguration.java └── transaction └── service ├── DemoService.java └── DemoService2.java /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled class file 2 | *.class 3 | 4 | # Log file 5 | *.log 6 | 7 | # BlueJ files 8 | *.ctxt 9 | 10 | # Mobile Tools for Java (J2ME) 11 | .mtj.tmp/ 12 | 13 | # Package Files # 14 | *.jar 15 | *.war 16 | *.nar 17 | *.ear 18 | *.zip 19 | *.tar.gz 20 | *.rar 21 | 22 | # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml 23 | hs_err_pid* 24 | 25 | target/ 26 | pom.xml.tag 27 | pom.xml.releaseBackup 28 | pom.xml.versionsBackup 29 | pom.xml.next 30 | release.properties 31 | dependency-reduced-pom.xml 32 | buildNumber.properties 33 | .mvn/timing.properties 34 | .mvn/wrapper/maven-wrapper.jar 35 | 36 | .idea/ -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # spring-boot-source-analysis-code 2 | 掘金 《SpringBoot源码解读与原理分析》 小册测试和演示代码。 3 | 4 | 当初我写小册的时候，一直用的这一个工程，所以pom一直在变化(逃...)，当然也由于研究原理通常最好是动手实践，所以我没做那种现成的，只要clone下来就能立马运行的，我这边写的也只是参考，小伙伴们最好是亲自试一试，跟着Debug走走看。小册中使用的场景都很简单，尽可能的原生，不加入过多的东西，为的就是这个。 5 | 6 | 所有的测试代码都放在src/main/java的example包下，需要哪个模块可以直接从那里头找。有一些简单的模块（config、enablexxx等）里面有个App的类，那就是不需要依赖SpringBoot启动环境来测试的，可以直接运行App的main方法测试即可。 7 | 8 | 可能存在描述的不详细的部分，欢迎小伙伴们提出需求。 -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 4.0.0 5 | 6 | org.springframework.boot 7 | spring-boot-starter-parent 8 | 2.1.9.RELEASE 9 | 10 | com.linkedbear 11 | spring-boot-source-analysis-code 12 | 0.0.1-SNAPSHOT 13 | spring-boot-source-analysis-code 14 | 15 | 16 | 1.8 17 | 18 | 19 | 20 | 21 | org.springframework.boot 22 | spring-boot-starter-web 23 | 24 | 25 | 26 | 32 | 33 | 34 | 40 | 41 | 42 | 43 | 49 | 50 | 51 | 52 | 53 | 54 | org.springframework.boot 55 | spring-boot-maven-plugin 56 | 57 | 58 | 59 | 60 | -------------------------------------------------------------------------------- /q&a/36. 自动装配的补充.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LinkedBear/spring-boot-source-analysis-code/2ec9ad6f307927458bc76c43524dc737bf116d52/q&a/36. 自动装配的补充.jpg -------------------------------------------------------------------------------- /q&a/自动装配.md: -------------------------------------------------------------------------------- 1 | Q： `AutoConfigurationExcludeFilter` 这个过滤器会检测到 主启动类是一个配置类，然后就会不去扫描这个类了么？但是又为啥要过滤掉这些配置类呢? 2 | A：如果你在 SpringBoot 应用启动后打印一下IOC容器的所有Bean，会发现所有自动配置类都没有注册进去，这才是 `AutoConfigurationExcludeFilter` 的作用。至于过滤配置类的意图，这是 SpringBoot 的设计约定吧，自动配置类不应该是一个组件，就好比咱之前用 SpringFramework 时，用 xml 配置时，IOC容器也只是把 xml 里面定义的组件加载，而 xml 这个文件本身不在IOC容器中。 3 | 4 | Q：一个标注了 `@Configuration` 的类 本身是不应该被装载进IOC容器，但是其中的 `@Bean` 注解注入的bean会被装载进IOC容器的了，是这样吗？ 5 | A：配置类的方式跟xml还是有区别的。配置类在IOC容器初始化时，需要被加载到IOC容器中才能被解析，这个事比较复杂，我简单概述下吧。IOC容器在初始化咱声明的组件也好，配置类也好，都是先将你配置的这些组件先封装为一个 `BeanDefinition`，之后再被一个叫 `ConfigurationClassPostProcessor` 的后置处理器解析（有关这个后置处理器的解释在第12篇的5.2章节），这个后置处理器会把咱写的配置类扫描到，再来解析配置类里头定义的@Bean等等。所以配置类要想里面的内容生效，需要先将配置类放入IOC容器，这样IOC容器里的特定组件（也就是 `ConfigurationClassPostProcessor`）才能对这些配置类进行处理。 6 | 7 | Q：这地方好像是因为需要同时满足 `@configuration` 和 `@AutoConfiguration` 两个注解才会去过来调。所以一般的 `@Configuration` 配置类还是会被包扫描到然后加入IOC容器中的了？ 8 | A：没有 `@AutoConfiguration` 这个注解啊，它的判断依据是咱在小册里提到的 `spring.factories` 中配置的 `EnableAutoConfiguration` 的值 9 | 10 | ----------------------- 11 | 12 | Q：`selectImports` 方法 `getAutoConfigurationEntry()` 中有一个 `fireAutoConfigurationImportEvents(configurations, exclusions);` 我看到在这之前对加载的配置进行了去重以及 exclude 以及使用了过滤器对一些配置类进行了排除，但是最后的这个 `fireAutoConfigurationImportEvents` 作用是什么？难道是有监听器在监听着自动配置？ 13 | 14 | ```java 15 | private void fireAutoConfigurationImportEvents(List configurations, Set exclusions) { 16 | List listeners = getAutoConfigurationImportListeners(); 17 | if (!listeners.isEmpty()) { 18 | AutoConfigurationImportEvent event = new AutoConfigurationImportEvent(this, configurations, exclusions); 19 | for (AutoConfigurationImportListener listener : listeners) { 20 | invokeAwareMethods(listener); 21 | listener.onAutoConfigurationImportEvent(event); 22 | } 23 | } 24 | } 25 | ``` 26 | 27 | A：自动配置完成后，`AutoConfigurationImportSelector` 会调你问题中提到的 `fireAutoConfigurationImportEvents` 方法，咱从源码中可以看到它会取一组类型为 `AutoConfigurationImportListener` 的监听器，执行它们的 `onAutoConfigurationImportEvent` 方法。借助IDEA查找这个接口的实现，发现只有一个实现类： `ConditionEvaluationReportAutoConfigurationImportListener`，这个名很长，咱从这个名上可以捕捉到一个概念：**report**。 28 | 29 | ```java 30 | /** 31 | * link AutoConfigurationImportListener to record results with the ConditionEvaluationReport. 32 | */ 33 | class ConditionEvaluationReportAutoConfigurationImportListener 34 | implements AutoConfigurationImportListener, BeanFactoryAware { 35 | public void onAutoConfigurationImportEvent(AutoConfigurationImportEvent event) { 36 | if (this.beanFactory != null) { 37 | ConditionEvaluationReport report = ConditionEvaluationReport.get(this.beanFactory); 38 | report.recordEvaluationCandidates(event.getCandidateConfigurations()); 39 | report.recordExclusions(event.getExclusions()); 40 | } 41 | } 42 | // ...... 43 | ``` 44 | 45 | 其实在这个类的文档注释上写的很明白了，它的功能大概可以看出来是：记录条件装配的结果报告。如果你对此不是很了解，可以在 `application.properties` 中设置 `logging.level.root=debug`，在debug模式下，SpringBoot 会打印自动装配结果报告（这是 SpringBoot 基础知识）。 46 | 47 | 下面是Debug打印自动装配报告的节选： 48 | 49 | ``` 50 | ValidationAutoConfiguration matched: 51 | - @ConditionalOnClass found required class 'javax.validation.executable.ExecutableValidator' (OnClassCondition) 52 | - @ConditionalOnResource found location classpath:META-INF/services/javax.validation.spi.ValidationProvider (OnResourceCondition) 53 | 54 | ValidationAutoConfiguration#defaultValidator matched: 55 | - @ConditionalOnMissingBean (types: javax.validation.Validator; SearchStrategy: all) did not find any beans (OnBeanCondition) 56 | 57 | ValidationAutoConfiguration#methodValidationPostProcessor matched: 58 | - @ConditionalOnMissingBean (types: org.springframework.validation.beanvalidation.MethodValidationPostProcessor; SearchStrategy: all) did not find any beans (OnBeanCondition) 59 | 60 | WebMvcAutoConfiguration matched: 61 | - @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'org.springframework.web.servlet.DispatcherServlet', 'org.springframework.web.servlet.config.annotation.WebMvcConfigurer' (OnClassCondition) 62 | - found 'session' scope (OnWebApplicationCondition) 63 | - @ConditionalOnMissingBean (types: org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport; SearchStrategy: all) did not find any beans (OnBeanCondition) 64 | 65 | WebMvcAutoConfiguration#formContentFilter matched: 66 | - @ConditionalOnProperty (spring.mvc.formcontent.filter.enabled) matched (OnPropertyCondition) 67 | - @ConditionalOnMissingBean (types: org.springframework.web.filter.FormContentFilter; SearchStrategy: all) did not find any beans (OnBeanCondition) 68 | 69 | WebMvcAutoConfiguration#hiddenHttpMethodFilter matched: 70 | - @ConditionalOnProperty (spring.mvc.hiddenmethod.filter.enabled) matched (OnPropertyCondition) 71 | - @ConditionalOnMissingBean (types: org.springframework.web.filter.HiddenHttpMethodFilter; SearchStrategy: all) did not find any beans (OnBeanCondition) 72 | 73 | ``` 74 | 75 | -------------------------------------------------------------------------------- /src/main/java/com/example/demo/DemoApplication.java: -------------------------------------------------------------------------------- 1 | package com.example.demo; 2 | 3 | import org.springframework.boot.SpringApplication; 4 | import org.springframework.boot.autoconfigure.SpringBootApplication; 5 | 6 | @SpringBootApplication 7 | public class DemoApplication { 8 | 9 | public static void main(String[] args) { 10 | SpringApplication.run(DemoApplication.class, args); 11 | } 12 | 13 | } 14 | -------------------------------------------------------------------------------- /src/main/java/example/aop/DemoAspect.java: -------------------------------------------------------------------------------- 1 | package example.aop; 2 | 3 | import org.aspectj.lang.JoinPoint; 4 | import org.aspectj.lang.annotation.Aspect; 5 | import org.aspectj.lang.annotation.Before; 6 | 7 | @Aspect 8 | public class DemoAspect { 9 | 10 | @Before("execution(public * com.example.demo.*.*(..))") 11 | public void doBefore(JoinPoint joinPoint) { 12 | System.out.println("doBefore run..."); 13 | } 14 | 15 | } 16 | -------------------------------------------------------------------------------- /src/main/java/example/conditional/App.java: -------------------------------------------------------------------------------- 1 | package example.conditional; 2 | 3 | import org.springframework.context.annotation.AnnotationConfigApplicationContext; 4 | 5 | import java.util.stream.Stream; 6 | 7 | public class App { 8 | 9 | public static void main(String[] args) { 10 | AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ColorConfiguration.class); 11 | String[] beanDefinitionNames = ctx.getBeanDefinitionNames(); 12 | Stream.of(beanDefinitionNames).forEach(System.out::println); 13 | } 14 | 15 | } 16 | -------------------------------------------------------------------------------- /src/main/java/example/conditional/ColorConditional.java: -------------------------------------------------------------------------------- 1 | package example.conditional; 2 | 3 | import org.springframework.context.annotation.Condition; 4 | import org.springframework.context.annotation.ConditionContext; 5 | import org.springframework.core.type.AnnotatedTypeMetadata; 6 | 7 | public class ColorConditional implements Condition { 8 | 9 | @Override 10 | public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) { 11 | return context.getRegistry().containsBeanDefinition("red"); 12 | } 13 | 14 | } 15 | -------------------------------------------------------------------------------- /src/main/java/example/conditional/ColorConfiguration.java: -------------------------------------------------------------------------------- 1 | package example.conditional; 2 | 3 | import example.enablexxx.Black; 4 | import example.enablexxx.Blue; 5 | import example.enablexxx.Red; 6 | import org.springframework.context.annotation.Bean; 7 | import org.springframework.context.annotation.Conditional; 8 | import org.springframework.context.annotation.Configuration; 9 | 10 | @Configuration 11 | public class ColorConfiguration { 12 | 13 | @Bean 14 | public Red red() { 15 | return new Red(); 16 | } 17 | 18 | @Bean 19 | public Black black() { 20 | return new Black(); 21 | } 22 | 23 | @Bean 24 | @Conditional(ColorConditional.class) 25 | public Blue blue() { 26 | return new Blue(); 27 | } 28 | 29 | } 30 | -------------------------------------------------------------------------------- /src/main/java/example/config/App.java: -------------------------------------------------------------------------------- 1 | package example.config; 2 | 3 | import org.springframework.context.annotation.AnnotationConfigApplicationContext; 4 | 5 | import java.util.stream.Stream; 6 | 7 | public class App { 8 | 9 | public static void main(String[] args) { 10 | AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ConfigurationDemo.class); 11 | String[] beanDefinitionNames = ctx.getBeanDefinitionNames(); 12 | Stream.of(beanDefinitionNames).forEach(System.out::println); 13 | } 14 | 15 | } 16 | -------------------------------------------------------------------------------- /src/main/java/example/config/ConfigurationDemo.java: -------------------------------------------------------------------------------- 1 | package example.config; 2 | 3 | import org.springframework.context.annotation.Bean; 4 | import org.springframework.context.annotation.ComponentScan; 5 | import org.springframework.context.annotation.Configuration; 6 | 7 | import java.util.Date; 8 | 9 | @Configuration 10 | @ComponentScan("example.config") 11 | public class ConfigurationDemo { 12 | 13 | @Bean 14 | public Date currentDate() { 15 | return new Date(); 16 | } 17 | 18 | } 19 | -------------------------------------------------------------------------------- /src/main/java/example/customizer/WebMvcCustomizer.java: -------------------------------------------------------------------------------- 1 | package example.customizer; 2 | 3 | import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory; 4 | import org.springframework.boot.web.server.WebServerFactoryCustomizer; 5 | import org.springframework.core.Ordered; 6 | import org.springframework.core.annotation.Order; 7 | import org.springframework.stereotype.Component; 8 | 9 | @Order(0) 10 | @Component 11 | public class WebMvcCustomizer implements WebServerFactoryCustomizer, Ordered { 12 | 13 | @Override 14 | public void customize(TomcatServletWebServerFactory factory) { 15 | factory.setPort(9090); 16 | factory.setContextPath("/demo"); 17 | } 18 | 19 | @Override 20 | public int getOrder() { 21 | return 0; 22 | } 23 | 24 | } 25 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/App.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | import org.springframework.context.annotation.AnnotationConfigApplicationContext; 4 | 5 | import java.util.stream.Stream; 6 | 7 | public class App { 8 | 9 | public static void main(String[] args) { 10 | AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(ColorConfiguration.class); 11 | String[] beanDefinitionNames = ctx.getBeanDefinitionNames(); 12 | Stream.of(beanDefinitionNames).forEach(System.out::println); 13 | } 14 | 15 | } 16 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/Black.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | public class Black { 4 | 5 | } 6 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/Blue.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | public class Blue { 4 | 5 | } 6 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/ColorConfiguration.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | import org.springframework.context.annotation.Configuration; 4 | 5 | @EnableColor 6 | @Configuration 7 | public class ColorConfiguration { 8 | 9 | } 10 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/ColorImportBeanDefinitionRegistrar.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | import org.springframework.beans.factory.support.BeanDefinitionRegistry; 4 | import org.springframework.beans.factory.support.RootBeanDefinition; 5 | import org.springframework.context.annotation.ImportBeanDefinitionRegistrar; 6 | import org.springframework.core.type.AnnotationMetadata; 7 | 8 | public class ColorImportBeanDefinitionRegistrar implements ImportBeanDefinitionRegistrar { 9 | 10 | @Override 11 | public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) { 12 | registry.registerBeanDefinition("black", new RootBeanDefinition(Black.class)); 13 | } 14 | 15 | } 16 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/ColorImportSelector.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | import org.springframework.context.annotation.ImportSelector; 4 | import org.springframework.core.type.AnnotationMetadata; 5 | 6 | public class ColorImportSelector implements ImportSelector { 7 | 8 | @Override 9 | public String[] selectImports(AnnotationMetadata importingClassMetadata) { 10 | return new String[] {Blue.class.getName(), Green.class.getName()}; 11 | } 12 | 13 | } 14 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/ColorRegistrarConfiguration.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | import org.springframework.context.annotation.Bean; 4 | import org.springframework.context.annotation.Configuration; 5 | 6 | @Configuration 7 | public class ColorRegistrarConfiguration { 8 | 9 | @Bean 10 | public Yellow yellow() { 11 | return new Yellow(); 12 | } 13 | 14 | } 15 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/EnableColor.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | import org.springframework.context.annotation.Import; 4 | 5 | import java.lang.annotation.Documented; 6 | import java.lang.annotation.ElementType; 7 | import java.lang.annotation.Retention; 8 | import java.lang.annotation.RetentionPolicy; 9 | import java.lang.annotation.Target; 10 | 11 | @Documented 12 | @Retention(RetentionPolicy.RUNTIME) 13 | @Target(ElementType.TYPE) 14 | @Import({Red.class, ColorRegistrarConfiguration.class, ColorImportSelector.class, ColorImportBeanDefinitionRegistrar.class}) 15 | public @interface EnableColor { 16 | 17 | } 18 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/Green.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | public class Green { 4 | 5 | } 6 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/Red.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | public class Red { 4 | 5 | } 6 | -------------------------------------------------------------------------------- /src/main/java/example/enablexxx/Yellow.java: -------------------------------------------------------------------------------- 1 | package example.enablexxx; 2 | 3 | public class Yellow { 4 | 5 | } 6 | -------------------------------------------------------------------------------- /src/main/java/example/init/Cat.java: -------------------------------------------------------------------------------- 1 | package example.init; 2 | 3 | import org.springframework.beans.factory.InitializingBean; 4 | import org.springframework.stereotype.Component; 5 | 6 | import javax.annotation.PostConstruct; 7 | 8 | @Component 9 | public class Cat implements InitializingBean { 10 | 11 | public Cat(String name) { 12 | System.out.println("Cat constructor run..."); 13 | } 14 | 15 | @PostConstruct 16 | public void afterInit() { 17 | System.out.println("Cat PostConstruct run..."); 18 | } 19 | 20 | 21 | @Override 22 | public void afterPropertiesSet() { 23 | System.out.println("Cat afterPropertiesSet run..."); 24 | } 25 | } 26 | -------------------------------------------------------------------------------- /src/main/java/example/init/CatBeanPostProcessor.java: -------------------------------------------------------------------------------- 1 | package example.init; 2 | 3 | import org.springframework.beans.BeansException; 4 | import org.springframework.beans.factory.config.BeanPostProcessor; 5 | import org.springframework.stereotype.Component; 6 | 7 | @Component 8 | public class CatBeanPostProcessor implements BeanPostProcessor { 9 | 10 | @Override 11 | public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException { 12 | if (bean instanceof Cat) { 13 | System.out.println("Cat postProcessBeforeInitialization run..."); 14 | } 15 | return bean; 16 | } 17 | 18 | @Override 19 | public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException { 20 | if (bean instanceof Cat) { 21 | System.out.println("Cat postProcessAfterInitialization run..."); 22 | } 23 | return bean; 24 | } 25 | 26 | } 27 | -------------------------------------------------------------------------------- /src/main/java/example/servlet/DemoServlet.java: -------------------------------------------------------------------------------- 1 | package example.servlet; 2 | 3 | import javax.servlet.http.HttpServlet; 4 | import javax.servlet.http.HttpServletRequest; 5 | import javax.servlet.http.HttpServletResponse; 6 | import java.io.IOException; 7 | 8 | public class DemoServlet extends HttpServlet { 9 | 10 | @Override 11 | protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException { 12 | response.getWriter().println("demo servlet"); 13 | } 14 | 15 | } 16 | -------------------------------------------------------------------------------- /src/main/java/example/servlet/DemoServletRegistryBean.java: -------------------------------------------------------------------------------- 1 | package example.servlet; 2 | 3 | import org.springframework.boot.web.servlet.ServletRegistrationBean; 4 | 5 | public class DemoServletRegistryBean extends ServletRegistrationBean { 6 | 7 | public DemoServletRegistryBean(DemoServlet servlet, String... urlMappings) { 8 | super(servlet, urlMappings); 9 | } 10 | 11 | } 12 | -------------------------------------------------------------------------------- /src/main/java/example/servlet/ServletConfiguration.java: -------------------------------------------------------------------------------- 1 | package example.servlet; 2 | 3 | import org.springframework.context.annotation.Bean; 4 | import org.springframework.context.annotation.Configuration; 5 | 6 | @Configuration 7 | public class ServletConfiguration { 8 | 9 | @Bean 10 | public DemoServletRegistryBean demoServletRegistryBean() { 11 | return new DemoServletRegistryBean(new DemoServlet(), "/demo/servlet"); 12 | } 13 | 14 | } 15 | -------------------------------------------------------------------------------- /src/main/java/example/transaction/service/DemoService.java: -------------------------------------------------------------------------------- 1 | package example.transaction.service; 2 | 3 | import org.springframework.stereotype.Service; 4 | import org.springframework.transaction.annotation.Propagation; 5 | import org.springframework.transaction.annotation.Transactional; 6 | 7 | @Service 8 | public class DemoService { 9 | 10 | @Transactional(rollbackFor = Exception.class, propagation = Propagation.NESTED) 11 | public void test1() { 12 | System.out.println("test1 run..."); 13 | // int i = 1 / 0; 14 | System.out.println("test1 finish..."); 15 | } 16 | 17 | } 18 | -------------------------------------------------------------------------------- /src/main/java/example/transaction/service/DemoService2.java: -------------------------------------------------------------------------------- 1 | package example.transaction.service; 2 | 3 | import org.springframework.beans.factory.annotation.Autowired; 4 | import org.springframework.stereotype.Service; 5 | import org.springframework.transaction.annotation.Propagation; 6 | import org.springframework.transaction.annotation.Transactional; 7 | 8 | @Service 9 | public class DemoService2 { 10 | 11 | @Autowired 12 | private DemoService demoService; 13 | 14 | @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRED) 15 | public void test2() { 16 | System.out.println("test2 run..."); 17 | demoService.test1(); 18 | System.out.println("test2 finish..."); 19 | } 20 | 21 | } 22 | --------------------------------------------------------------------------------