SpringBoot 1.x整合Dubbo解决@Reference注解问题

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"SpringBoot通过整合Dubbo解决@Reference注解问题" 在现代微服务架构中,SpringBoot因其简洁的配置和强大的功能深受开发者喜爱。同时,Dubbo作为阿里巴巴开源的一款高性能、轻量级的Java RPC框架,常用于构建分布式服务。然而,在SpringBoot 2.x版本中,整合Dubbo时可能会遇到一些问题,特别是在使用`@Reference`注解来注入远程服务时。本篇文章将详细介绍如何在SpringBoot中正确地整合Dubbo,并解决`@Reference`注解的相关问题。 首先,我们需要了解的是SpringBoot 2.x与Dubbo的兼容性问题。SpringBoot 2.x引入了新的特性,与Dubbo的某些配置可能产生冲突。因此,如果你使用的是SpringBoot 2.x版本,可能会遇到`@Reference`注解无法正常工作的情况。为了避免这个问题,建议降级到SpringBoot 1.x版本,例如1.5.9.RELEASE。在`pom.xml`文件中,将父依赖版本更改为1.5.9.RELEASE,确保使用的是SpringBoot的稳定版本。 接下来,我们将讨论如何配置SpringBoot与Dubbo的整合: 1. **配置Zookeeper**:Dubbo通常使用Zookeeper作为注册中心。在消费者的配置文件(如`application.properties`)中,你需要指定Zookeeper的地址,如下: ``` spring.dubbo.registry.address=zookeeper://120.79.168.47:2181 ``` 2. **定义服务协议**:Dubbo使用特定的协议进行通信,这里通常选择dubbo。在消费者配置文件中设置: ``` spring.dubbo.protocol.name=dubbo ``` 3. **扫描服务接口**:为了自动发现并加载服务接口,需要指定包扫描路径: ``` spring.dubbo.scan=com.diko.graduation.system.config ``` 4. **设置应用名**:每个服务提供者和消费者都需要一个唯一的应用名,方便识别: ``` spring.dubbo.application.name=system ``` 对于服务提供者,配置基本类似,但需要额外指定服务的暴露端口: ``` spring.dubbo.protocol.port=20880 ``` 此外,还需要确保服务提供者的扫描包路径指向包含服务接口的包: ``` spring.dubbo.scan=com.diko.graduation.rpcbase ``` 如果上述配置完成后仍然存在问题,可能是因为服务提供者注册到Zookeeper的地址不正确。在多网络环境下,服务器可能有多个IP地址,包括内网IP和外网IP。确保服务提供者使用正确的IP地址注册到Zookeeper,以保证消费者能够找到并消费服务。 解决SpringBoot整合Dubbo时`@Reference`注解问题的关键在于选择合适的SpringBoot版本、正确配置Dubbo的各个参数以及确保服务提供者注册地址的准确性。遵循这些步骤,应该能够顺利地在SpringBoot项目中使用Dubbo进行服务调用。在实践中,还应注意日志监控和异常处理,以便快速定位并解决问题。
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I. Spring Boot Documentation 1. About the Documentation 2. Getting Help 3. First Steps 4. Working with Spring Boot 5. Learning about Spring Boot Features 6. Moving to Production 7. Advanced Topics II. Getting Started 8. Introducing Spring Boot 9. System Requirements 9.1. Servlet Containers 10. Installing Spring Boot 10.1. Installation Instructions for the Java Developer 10.1.1. Maven Installation 10.1.2. Gradle Installation 10.2. Installing the Spring Boot CLI 10.2.1. Manual Installation 10.2.2. Installation with SDKMAN! 10.2.3. OSX Homebrew Installation 10.2.4. MacPorts Installation 10.2.5. Command-line Completion 10.2.6. Quick-start Spring CLI Example 10.3. Upgrading from an Earlier Version of Spring Boot 11. Developing Your First Spring Boot Application 11.1. Creating the POM 11.2. Adding Classpath Dependencies 11.3. Writing the Code 11.3.1. The @RestController and @RequestMapping Annotations 11.3.2. The @EnableAutoConfiguration Annotation 11.3.3. The “main” Method 11.4. Running the Example 11.5. Creating an Executable Jar 12. What to Read Next III. Using Spring Boot 13. Build Systems 13.1. Dependency Management 13.2. Maven 13.2.1. Inheriting the Starter Parent 13.2.2. Using Spring Boot without the Parent POM 13.2.3. Using the Spring Boot Maven Plugin 13.3. Gradle 13.4. Ant 13.5. Starters 14. Structuring Your Code 14.1. Using the “default” Package 14.2. Locating the Main Application Class 15. Configuration Classes 15.1. Importing Additional Configuration Classes 15.2. Importing XML Configuration 16. Auto-configuration 16.1. Gradually Replacing Auto-configuration 16.2. Disabling Specific Auto-configuration Classes 17. Spring Beans and Dependency Injection 18. Using the @SpringBootApplication Annotation 19. Running Your Application 19.1. Running from an IDE 19.2. Running as a Packaged Application 19.3. Using the Maven Plugin 19.4. Using the Gradle Plugin 19.5. Hot Swapping 20. Developer Tools 20.1. Property Defaults 20.2. Automatic Restart 20.2.1. Logging changes in condition evaluation 20.2.2. Excluding Resources 20.2.3. Watching Additional Paths 20.2.4. Disabling Restart 20.2.5. Using a Trigger File 20.2.6. Customizing the Restart Classloader 20.2.7. Known Limitations 20.3. LiveReload 20.4. Global Settings 20.5. Remote Applications 20.5.1. Running the Remote Client Application 20.5.2. Remote Update 21. Packaging Your Application for Production 22. What to Read Next IV. Spring Boot features 23. SpringApplication 23.1. Startup Failure 23.2. Customizing the Banner 23.3. Customizing SpringApplication 23.4. Fluent Builder API 23.5. Application Events and Listeners 23.6. Web Environment 23.7. Accessing Application Arguments 23.8. Using the ApplicationRunner or CommandLineRunner 23.9. Application Exit 23.10. Admin Features 24. Externalized Configuration 24.1. Configuring Random Values 24.2. Accessing Command Line Properties 24.3. Application Property Files 24.4. Profile-specific Properties 24.5. Placeholders in Properties 24.6. Using YAML Instead of Properties 24.6.1. Loading YAML 24.6.2. Exposing YAML as Properties in the Spring Environment 24.6.3. Multi-profile YAML Documents 24.6.4. YAML Shortcomings 24.7. Type-safe Configuration Properties 24.7.1. Third-party Configuration 24.7.2. Relaxed Binding 24.7.3. Merging Complex Types 24.7.4. Properties Conversion Converting durations 24.7.5. @ConfigurationProperties Validation 24.7.6. @ConfigurationProperties vs. @Value 25. Profiles 25.1. Adding Active Profiles 25.2. Programmatically Setting Profiles 25.3. Profile-specific Configuration Files 26. Logging 26.1. Log Format 26.2. Console Output 26.2.1. Color-coded Output 26.3. File Output 26.4. Log Levels 26.5. Custom Log Configuration 26.6. Logback Extensions 26.6.1. Profile-specific Configuration 26.6.2. Environment Properties 27. Developing Web Applications 27.1. The “Spring Web MVC Framework” 27.1.1. Spring MVC Auto-configuration 27.1.2. HttpMessageConverters 27.1.3. Custom JSON Serializers and Deserializers 27.1.4. MessageCodesResolver 27.1.5. Static Content 27.1.6. Welcome Page 27.1.7. Custom Favicon 27.1.8. Path Matching and Content Negotiation 27.1.9. ConfigurableWebBindingInitializer 27.1.10. Template Engines 27.1.11. Error Handling Custom Error Pages Mapping Error Pages outside of Spring MVC 27.1.12. Spring HATEOAS 27.1.13. CORS Support 27.2. The “Spring WebFlux Framework” 27.2.1. Spring WebFlux Auto-configuration 27.2.2. HTTP Codecs with HttpMessageReaders and HttpMessageWriters 27.2.3. Static Content 27.2.4. Template Engines 27.2.5. Error Handling Custom Error Pages 27.2.6. Web Filters 27.3. JAX-RS and Jersey 27.4. Embedded Servlet Container Support 27.4.1. Servlets, Filters, and listeners Registering Servlets, Filters, and Listeners as Spring Beans 27.4.2. Servlet Context Initialization Scanning for Servlets, Filters, and listeners 27.4.3. The ServletWebServerApplicationContext 27.4.4. Customizing Embedded Servlet Containers Programmatic Customization Customizing ConfigurableServletWebServerFactory Directly 27.4.5. JSP Limitations 28. Security 28.1. MVC Security 28.2. WebFlux Security 28.3. OAuth2 28.3.1. Client 28.3.2. Server 28.4. Actuator Security 28.4.1. Cross Site Request Forgery Protection 29. Working with SQL Databases 29.1. Configure a DataSource 29.1.1. Embedded Database Support 29.1.2. Connection to a Production Database 29.1.3. Connection to a JNDI DataSource 29.2. Using JdbcTemplate 29.3. JPA and “Spring Data” 29.3.1. Entity Classes 29.3.2. Spring Data JPA Repositories 29.3.3. Creating and Dropping JPA Databases 29.3.4. Open EntityManager in View 29.4. Using H2’s Web Console 29.4.1. Changing the H2 Console’s Path 29.5. Using jOOQ 29.5.1. Code Generation 29.5.2. Using DSLContext 29.5.3. jOOQ SQL Dialect 29.5.4. Customizing jOOQ 30. Working with NoSQL Technologies 30.1. Redis 30.1.1. Connecting to Redis 30.2. MongoDB 30.2.1. Connecting to a MongoDB Database 30.2.2. MongoTemplate 30.2.3. Spring Data MongoDB Repositories 30.2.4. Embedded Mongo 30.3. Neo4j 30.3.1. Connecting to a Neo4j Database 30.3.2. Using the Embedded Mode 30.3.3. Neo4jSession 30.3.4. Spring Data Neo4j Repositories 30.3.5. Repository Example 30.4. Gemfire 30.5. Solr 30.5.1. Connecting to Solr 30.5.2. Spring Data Solr Repositories 30.6. Elasticsearch 30.6.1. Connecting to Elasticsearch by Using Jest 30.6.2. Connecting to Elasticsearch by Using Spring Data 30.6.3. Spring Data Elasticsearch Repositories 30.7. Cassandra 30.7.1. Connecting to Cassandra 30.7.2. Spring Data Cassandra Repositories 30.8. Couchbase 30.8.1. Connecting to Couchbase 30.8.2. Spring Data Couchbase Repositories 30.9. LDAP 30.9.1. Connecting to an LDAP Server 30.9.2. Spring Data LDAP Repositories 30.9.3. Embedded In-memory LDAP Server 30.10. InfluxDB 30.10.1. Connecting to InfluxDB 31. Caching 31.1. Supported Cache Providers 31.1.1. Generic 31.1.2. JCache (JSR-107) 31.1.3. EhCache 2.x 31.1.4. Hazelcast 31.1.5. Infinispan 31.1.6. Couchbase 31.1.7. Redis 31.1.8. Caffeine 31.1.9. Simple 31.1.10. None 32. Messaging 32.1. JMS 32.1.1. ActiveMQ Support 32.1.2. Artemis Support 32.1.3. Using a JNDI ConnectionFactory 32.1.4. Sending a Message 32.1.5. Receiving a Message 32.2. AMQP 32.2.1. RabbitMQ support 32.2.2. Sending a Message 32.2.3. Receiving a Message 32.3. Apache Kafka Support 32.3.1. Sending a Message 32.3.2. Receiving a Message 32.3.3. Additional Kafka Properties 33. Calling REST Services with RestTemplate 33.1. RestTemplate Customization 34. Calling REST Services with WebClient 34.1. WebClient Customization 35. Validation 36. Sending Email 37. Distributed Transactions with JTA 37.1. Using an Atomikos Transaction Manager 37.2. Using a Bitronix Transaction Manager 37.3. Using a Narayana Transaction Manager 37.4. Using a Java EE Managed Transaction Manager 37.5. Mixing XA and Non-XA JMS Connections 37.6. Supporting an Alternative Embedded Transaction Manager 38. Hazelcast 39. Quartz Scheduler 40. Spring Integration 41. Spring Session 42. Monitoring and Management over JMX 43. Testing 43.1. Test Scope Dependencies 43.2. Testing Spring Applications 43.3. Testing Spring Boot Applications 43.3.1. Detecting Web Application Type 43.3.2. Detecting Test Configuration 43.3.3. Excluding Test Configuration 43.3.4. Testing with a running server 43.3.5. Using JMX 43.3.6. Mocking and Spying Beans 43.3.7. Auto-configured Tests 43.3.8. Auto-configured JSON Tests 43.3.9. Auto-configured Spring MVC Tests 43.3.10. Auto-configured Spring WebFlux Tests 43.3.11. Auto-configured Data JPA Tests 43.3.12. Auto-configured JDBC Tests 43.3.13. Auto-configured jOOQ Tests 43.3.14. Auto-configured Data MongoDB Tests 43.3.15. Auto-configured Data Neo4j Tests 43.3.16. Auto-configured Data Redis Tests 43.3.17. Auto-configured Data LDAP Tests 43.3.18. Auto-configured REST Clients 43.3.19. Auto-configured Spring REST Docs Tests Auto-configured Spring REST Docs Tests with Mock MVC Auto-configured Spring REST Docs Tests with REST Assured 43.3.20. User Configuration and Slicing 43.3.21. Using Spock to Test Spring Boot Applications 43.4. Test Utilities 43.4.1. ConfigFileApplicationContextInitializer 43.4.2. TestPropertyValues 43.4.3. OutputCapture 43.4.4. TestRestTemplate 44. WebSockets 45. Web Services 46. Creating Your Own Auto-configuration 46.1. Understanding Auto-configured Beans 46.2. Locating Auto-configuration Candidates 46.3. Condition Annotations 46.3.1. Class Conditions 46.3.2. Bean Conditions 46.3.3. Property Conditions 46.3.4. Resource Conditions 46.3.5. Web Application Conditions 46.3.6. SpEL Expression Conditions 46.4. Testing your Auto-configuration 46.4.1. Simulating a Web Context 46.4.2. Overriding the Classpath 46.5. Creating Your Own Starter 46.5.1. Naming 46.5.2. autoconfigure Module 46.5.3. Starter Module 47. Kotlin support 47.1. Requirements 47.2. Null-safety 47.3. Kotlin API 47.3.1. runApplication 47.3.2. Extensions 47.4. Dependency management 47.5. @ConfigurationProperties 47.6. Testing 47.7. Resources 47.7.1. Further reading 47.7.2. Examples 48. What to Read Next V. Spring Boot Actuator: Production-ready features 49. Enabling Production-ready Features 50. Endpoints 50.1. Enabling Endpoints 50.2. Exposing Endpoints 50.3. Securing HTTP Endpoints 50.4. Configuring Endpoints 50.5. Hypermedia for Actuator Web Endpoints 50.6. Actuator Web Endpoint Paths 50.7. CORS Support 50.8. Implementing Custom Endpoints 50.8.1. Receiving Input Input type conversion 50.8.2. Custom Web Endpoints Web Endpoint Request Predicates Path HTTP method Consumes Produces Web Endpoint Response Status Web Endpoint Range Requests Web Endpoint Security 50.8.3. Servlet endpoints 50.8.4. Controller endpoints 50.9. Health Information 50.9.1. Auto-configured HealthIndicators 50.9.2. Writing Custom HealthIndicators 50.9.3. Reactive Health Indicators 50.9.4. Auto-configured ReactiveHealthIndicators 50.10. Application Information 50.10.1. Auto-configured InfoContributors 50.10.2. Custom Application Information 50.10.3. Git Commit Information 50.10.4. Build Information 50.10.5. Writing Custom InfoContributors 51. Monitoring and Management over HTTP 51.1. Customizing the Management Endpoint Paths 51.2. Customizing the Management Server Port 51.3. Configuring Management-specific SSL 51.4. Customizing the Management Server Address 51.5. Disabling HTTP Endpoints 52. Monitoring and Management over JMX 52.1. Customizing MBean Names 52.2. Disabling JMX Endpoints 52.3. Using Jolokia for JMX over HTTP 52.3.1. Customizing Jolokia 52.3.2. Disabling Jolokia 53. Loggers 53.1. Configure a Logger 54. Metrics 54.1. Getting started 54.2. Supported monitoring systems 54.2.1. Atlas 54.2.2. Datadog 54.2.3. Ganglia 54.2.4. Graphite 54.2.5. Influx 54.2.6. JMX 54.2.7. New Relic 54.2.8. Prometheus 54.2.9. SignalFx 54.2.10. Simple 54.2.11. StatsD 54.2.12. Wavefront 54.3. Supported Metrics 54.3.1. Spring MVC Metrics 54.3.2. Spring WebFlux Metrics 54.3.3. RestTemplate Metrics 54.3.4. Cache Metrics 54.3.5. DataSource Metrics 54.3.6. RabbitMQ Metrics 54.4. Registering custom metrics 54.5. Customizing individual metrics 54.5.1. Per-meter properties 54.6. Metrics endpoint 55. Auditing 56. HTTP Tracing 56.1. Custom HTTP tracing 57. Process Monitoring 57.1. Extending Configuration 57.2. Programmatically 58. Cloud Foundry Support 58.1. Disabling Extended Cloud Foundry Actuator Support 58.2. Cloud Foundry Self-signed Certificates 58.3. Custom context path 59. What to Read Next VI. Deploying Spring Boot Applications 60. Deploying to the Cloud 60.1. Cloud Foundry 60.1.1. Binding to Services 60.2. Heroku 60.3. OpenShift 60.4. Amazon Web Services (AWS) 60.4.1. AWS Elastic Beanstalk Using the Tomcat Platform Using the Java SE Platform 60.4.2. Summary 60.5. Boxfuse and Amazon Web Services 60.6. Google Cloud 61. Installing Spring Boot Applications 61.1. Supported Operating Systems 61.2. Unix/Linux Services 61.2.1. Installation as an init.d Service (System V) Securing an init.d Service 61.2.2. Installation as a systemd Service 61.2.3. Customizing the Startup Script Customizing the Start Script when It Is Written Customizing a Script When It Runs 61.3. Microsoft Windows Services 62. What to Read Next VII. Spring Boot CLI 63. Installing the CLI 64. Using the CLI 64.1. Running Applications with the CLI 64.1.1. Deduced “grab” Dependencies 64.1.2. Deduced “grab” Coordinates 64.1.3. Default Import Statements 64.1.4. Automatic Main Method 64.1.5. Custom Dependency Management 64.2. Applications with Multiple Source Files 64.3. Packaging Your Application 64.4. Initialize a New Project 64.5. Using the Embedded Shell 64.6. Adding Extensions to the CLI 65. Developing Applications with the Groovy Beans DSL 66. Configuring the CLI with settings.xml 67. What to Read Next VIII. Build tool plugins 68. Spring Boot Maven Plugin 68.1. Including the Plugin 68.2. Packaging Executable Jar and War Files 69. Spring Boot Gradle Plugin 70. Spring Boot AntLib Module 70.1. Spring Boot Ant Tasks 70.1.1. spring-boot:exejar 70.1.2. Examples 70.2. spring-boot:findmainclass 70.2.1. Examples 71. Supporting Other Build Systems 71.1. Repackaging Archives 71.2. Nested Libraries 71.3. Finding a Main Class 71.4. Example Repackage Implementation 72. What to Read Next IX. ‘How-to’ guides 73. Spring Boot Application 73.1. Create Your Own FailureAnalyzer 73.2. Troubleshoot Auto-configuration 73.3. Customize the Environment or ApplicationContext Before It Starts 73.4. Build an ApplicationContext Hierarchy (Adding a Parent or Root Context) 73.5. Create a Non-web Application 74. Properties and Configuration 74.1. Automatically Expand Properties at Build Time 74.1.1. Automatic Property Expansion Using Maven 74.1.2. Automatic Property Expansion Using Gradle 74.2. Externalize the Configuration of SpringApplication 74.3. Change the Location of External Properties of an Application 74.4. Use ‘Short’ Command Line Arguments 74.5. Use YAML for External Properties 74.6. Set the Active Spring Profiles 74.7. Change Configuration Depending on the Environment 74.8. Discover Built-in Options for External Properties 75. Embedded Web Servers 75.1. Use Another Web Server 75.2. Disabling the Web Server 75.3. Configure Jetty 75.4. Add a Servlet, Filter, or Listener to an Application 75.4.1. Add a Servlet, Filter, or Listener by Using a Spring Bean Disable Registration of a Servlet or Filter 75.4.2. Add Servlets, Filters, and Listeners by Using Classpath Scanning 75.5. Change the HTTP Port 75.6. Use a Random Unassigned HTTP Port 75.7. Discover the HTTP Port at Runtime 75.8. Configure SSL 75.9. Configure HTTP/2 75.9.1. HTTP/2 with Undertow 75.9.2. HTTP/2 with Jetty 75.9.3. HTTP/2 with Tomcat 75.10. Configure Access Logging 75.11. Running Behind a Front-end Proxy Server 75.11.1. Customize Tomcat’s Proxy Configuration 75.12. Configure Tomcat 75.13. Enable Multiple Connectors with Tomcat 75.14. Use Tomcat’s LegacyCookieProcessor 75.15. Configure Undertow 75.16. Enable Multiple Listeners with Undertow 75.17. Create WebSocket Endpoints Using @ServerEndpoint 75.18. Enable HTTP Response Compression 76. Spring MVC 76.1. Write a JSON REST Service 76.2. Write an XML REST Service 76.3. Customize the Jackson ObjectMapper 76.4. Customize the @ResponseBody Rendering 76.5. Handling Multipart File Uploads 76.6. Switch Off the Spring MVC DispatcherServlet 76.7. Switch off the Default MVC Configuration 76.8. Customize ViewResolvers 77. HTTP Clients 77.1. Configure RestTemplate to Use a Proxy 78. Logging 78.1. Configure Logback for Logging 78.1.1. Configure Logback for File-only Output 78.2. Configure Log4j for Logging 78.2.1. Use YAML or JSON to Configure Log4j 2 79. Data Access 79.1. Configure a Custom DataSource 79.2. Configure Two DataSources 79.3. Use Spring Data Repositories 79.4. Separate @Entity Definitions from Spring Configuration 79.5. Configure JPA Properties 79.6. Configure Hibernate Naming Strategy 79.7. Use a Custom EntityManagerFactory 79.8. Use Two EntityManagers 79.9. Use a Traditional persistence.xml File 79.10. Use Spring Data JPA and Mongo Repositories 79.11. Expose Spring Data Repositories as REST Endpoint 79.12. Configure a Component that is Used by JPA 79.13. Configure jOOQ with Two DataSources 80. Database Initialization 80.1. Initialize a Database Using JPA 80.2. Initialize a Database Using Hibernate 80.3. Initialize a Database 80.4. Initialize a Spring Batch Database 80.5. Use a Higher-level Database Migration Tool 80.5.1. Execute Flyway Database Migrations on Startup 80.5.2. Execute Liquibase Database Migrations on Startup 81. Messaging 81.1. Disable Transacted JMS Session 82. Batch Applications 82.1. Execute Spring Batch Jobs on Startup 83. Actuator 83.1. Change the HTTP Port or Address of the Actuator Endpoints 83.2. Customize the ‘whitelabel’ Error Page 84. Security 84.1. Switch off the Spring Boot Security Configuration 84.2. Change the UserDetailsService and Add User Accounts 84.3. Enable HTTPS When Running behind a Proxy Server 85. Hot Swapping 85.1. Reload Static Content 85.2. Reload Templates without Restarting the Container 85.2.1. Thymeleaf Templates 85.2.2. FreeMarker Templates 85.2.3. Groovy Templates 85.3. Fast Application Restarts 85.4. Reload Java Classes without Restarting the Container 86. Build 86.1. Generate Build Information 86.2. Generate Git Information 86.3. Customize Dependency Versions 86.4. Create an Executable JAR with Maven 86.5. Use a Spring Boot Application as a Dependency 86.6. Extract Specific Libraries When an Executable Jar Runs 86.7. Create a Non-executable JAR with Exclusions 86.8. Remote Debug a Spring Boot Application Started with Maven 86.9. Build an Executable Archive from Ant without Using spring-boot-antlib 87. Traditional Deployment 87.1. Create a Deployable War File 87.2. Convert an Existing Application to Spring Boot 87.3. Deploying a WAR to WebLogic 87.4. Use Jedis Instead of Lettuce X. Appendices A. Common application properties B. Configuration Metadata B.1. Metadata Format B.1.1. Group Attributes B.1.2. Property Attributes B.1.3. Hint Attributes B.1.4. Repeated Metadata Items B.2. Providing Manual Hints B.2.1. Value Hint B.2.2. Value Providers Any Class Reference Handle As Logger Name Spring Bean Reference Spring Profile Name B.3. Generating Your Own Metadata by Using the Annotation Processor B.3.1. Nested Properties B.3.2. Adding Additional Metadata C. Auto-configuration classes C.1. From the “spring-boot-autoconfigure” module C.2. From the “spring-boot-actuator-autoconfigure” module D. Test auto-configuration annotations E. The Executable Jar Format E.1. Nested JARs E.1.1. The Executable Jar File Structure E.1.2. The Executable War File Structure E.2. Spring Boot’s “JarFile” Class E.2.1. Compatibility with the Standard Java “JarFile” E.3. Launching Executable Jars E.3.1. Launcher Manifest E.3.2. Exploded Archives E.4. PropertiesLauncher Features E.5. Executable Jar Restrictions E.6. Alternative Single Jar Solutions F. Dependency versions