spring boot 项目搭建时，各个依赖的作用

项目搭建页面

https://start.spring.io/

各个依赖的作用

List of dependencies for Spring Boot 2.1.5.RELEASE

Core

• DevTools: Spring Boot Development Tools
• Lombok: Java annotation library which helps to reduce boilerplate code and code faster
• Configuration Processor: Generate metadata for your custom configuration keys
• Session: API and implementations for managing a user’s session information
• Cache: Spring's Cache abstraction
• Validation: JSR-303 validation infrastructure (already included with web)
• Retry: Provide declarative retry support via spring-retry
• Aspects: Create your own Aspects using Spring AOP and AspectJ

Web

• Web: Servlet web application with Spring MVC and Tomcat
• Reactive Web: Reactive web applications with Spring WebFlux and Netty
• Rest Repositories: Exposing Spring Data repositories over REST via Spring Data REST
• Rest Repositories HAL Browser: Browsing Spring Data REST repositories in your browser
• HATEOAS: HATEOAS-based RESTful services
• Web Services: Contract-first SOAP services with Spring Web Services
• Jersey: RESTful Web Services with JAX-RS
• REST Docs: Document RESTful services by combining hand-written and auto-generated documentation
• Vaadin: Vaadin java web application framework
• Apache CXF: RESTful Web Services with JAX-RSRequires Spring Boot >=1.5.0.RELEASE and <2.1.0.M1.
• Ratpack: Spring Boot integration for the Ratpack frameworkRequires Spring Boot >=1.5.0.RELEASE and <2.0.0.M1.
• Mobile: Simplify the development of mobile web applications with Spring MobileRequires Spring Boot >=1.5.0.RELEASE and <2.0.0.M1.

Template Engines

• Thymeleaf: Thymeleaf templating engine
• Freemarker: FreeMarker templating engine
• Mustache: Mustache templating engine
• Groovy Templates: Groovy templating engine

Security

• Security: Secure your application via spring-security
• OAuth2 Client: Spring Boot integration for Spring Security's OAuth2/OpenID Connect client features
• OAuth2 Resource Server: Spring Boot integration for Spring Security's OAuth2 resource server features
• Okta: Okta specific configuration for Spring Security/Spring Boot OAuth2 features

SQL

• JPA: Persist data in SQL stores with Java Persistence API using Spring Data and Hibernate
• MySQL: MySQL JDBC driver
• H2: H2 database (with embedded support)
• JDBC: Persistence support using JDBC
• MyBatis: Persistence support using MyBatis
• PostgreSQL: PostgreSQL JDBC driver
• SQL Server: Microsoft SQL Server JDBC driver
• HSQLDB: HSQLDB database (with embedded support)
• Apache Derby: Apache Derby database (with embedded support)
• Liquibase: Liquibase Database Migrations library
• Flyway: Flyway Database Migrations library
• JOOQ: Persistence support using Java Object Oriented Querying

NoSQL

• Redis: Access Redis key-value data stores with Spring Data Redis
• Reactive Redis: Access Redis key-value data stores in a reactive fashion with Spring Data Redis
• MongoDB: Access MongoDB NoSQL Database with Spring Data MongoDB
• Reactive MongoDB: Access MongoDB NoSQL Database in a reactive fashion with Spring Data MongoDB
• Embedded MongoDB: Embedded MongoDB for testing
• Elasticsearch: Elasticsearch search and analytics engine with Spring Data Elasticsearch
• Solr: Access Apache Solr search platform with Spring Data Solr
• Cassandra: Access Cassandra NoSQL Database with Spring Data Cassandra
• Reactive Cassandra: Access Cassandra NoSQL Database in a reactive fashion with Spring Data Cassandra
• Couchbase: Access Couchbase NoSQL database with Spring Data Couchbase
• Reactive Couchbase: Access Couchbase NoSQL database in a reactive fashion with Spring Data Couchbase
• Neo4j: Access Neo4j NoSQL graph database with Spring Data Neo4j
• Gemfire: Access GemFire distributed data store with Spring Data GemfireRequires Spring Boot >=1.5.0.RELEASE and <2.0.0.M1.

Messaging

• Spring Integration: Common spring-integration modules
• RabbitMQ: Advanced Message Queuing Protocol via Spring Rabbit
• Kafka: Kafka messaging support using Spring Kafka
• Kafka Streams: Building stream processing applications with Apache Kafka Streams
• JMS (ActiveMQ): Java Message Service API via Apache ActiveMQ
• JMS (Artemis): Java Message Service API via Apache Artemis
• WebSocket: WebSocket applications with SockJS and STOMP
• RSocket: RSocket.io applications with Spring Messaging and NettyRequires Spring Boot >=2.2.0.M2.

Cloud Core

• Cloud Bootstrap: spring-cloud-context (e.g. Bootstrap context and @RefreshScope)
• Cloud Function: Functions as Spring Beans
• Cloud Security: Secure load balancing and routing with spring-cloud-security
• Cloud OAuth2: OAuth2 and distributed application patterns with spring-cloud-security
• Cloud Task: Task result tracking with Spring Batch and Spring Cloud Stream integrations

Cloud Support

• Cloud Connectors: Simplifies connecting to services in cloud platforms, including spring-cloud-connector and spring-cloud-cloudfoundry-connector
• Open Service Broker: Create service brokers that conform to the Open Service Broker API specification

Cloud Config

• Config Client: Spring Cloud Config Client
• Config Server: Central management for configuration via a git or svn backend
• Vault Configuration: Configuration management with HashiCorp Vault
• Zookeeper Configuration: Configuration management with Zookeeper and spring-cloud-zookeeper-config
• Consul Configuration: Configuration management with Hashicorp Consul

Cloud Discovery

• Eureka Discovery: Service discovery using spring-cloud-netflix and Eureka
• Eureka Server: spring-cloud-netflix Eureka Server
• Zookeeper Discovery: Service discovery with Zookeeper and spring-cloud-zookeeper-discovery
• Cloud Foundry Discovery: Service discovery with Cloud Foundry
• Consul Discovery: Service discovery with Hashicorp Consul

Cloud Routing

• Zuul: Intelligent and programmable routing with spring-cloud-netflix Zuul
• Gateway: Intelligent and programmable routing with the reactive Spring Cloud Gateway
• Ribbon: Client side load balancing with spring-cloud-netflix and Ribbon
• Feign: Declarative REST clients with spring-cloud-netflix Feign

Cloud Circuit Breaker

• Hystrix: Circuit breaker with spring-cloud-netflix Hystrix
• Hystrix Dashboard: Circuit breaker dashboard with spring-cloud-netflix Hystrix
• Turbine: Circuit breaker metric aggregation using spring-cloud-netflix with Turbine and server-sent events
• Turbine Stream: Circuit breaker metric aggregation using spring-cloud-netflix with Turbine and Spring Cloud Stream (requires a binder, e.g. Kafka or RabbitMQ)

Cloud Tracing

• Sleuth: Distributed tracing via logs with spring-cloud-sleuth
• Zipkin Client: Distributed tracing with an existing Zipkin installation and spring-cloud-sleuth-zipkin. Alternatively, consider Sleuth Stream.

Cloud Messaging

• Cloud Bus: A simple control bus using Spring Cloud Stream (requires a binder, e.g. Kafka or RabbitMQ)
• Cloud Stream: Messaging microservices with Spring Cloud Stream (requires a binder, e.g. Kafka or RabbitMQ)
• Reactive Cloud Stream: Reactive messaging microservices with Spring Cloud Stream (requires a binder, e.g. Kafka or RabbitMQ)

Cloud Contract

• Cloud Contract Verifier: Test dependencies required for autogenerated tests
• Cloud Contract Stub Runner: Stub Runner for HTTP/Messaging based communication. Allows creating WireMock stubs from RestDocs tests

Pivotal Cloud Foundry

• Config Client (PCF): Config client on Pivotal Cloud Foundry
• Service Registry Client (PCF): Eureka service discovery client on Pivotal Cloud Foundry
• Circuit Breaker Client (PCF): Hystrix circuit breaker client on Pivotal Cloud Foundry

Amazon Web Services

• AWS Core: AWS native services from spring-cloud-aws
• AWS JDBC: Relational databases on AWS with RDS and spring-cloud-aws-jdbc
• AWS Messaging: Messaging on AWS with SQS and spring-cloud-aws-messaging

Azure

• Azure Support: Auto-configuration for Azure Services (service bus, storage, active directory, cosmos DB, key vault and more)
• Azure Active Directory: Spring Security integration with Azure Active Directory for authentication
• Azure Key Vault: Spring value annotation integration with Azure Key Vault Secrets
• Azure Storage: Azure Storage service integration

Google Cloud Platform

• GCP Support: Support for Google Cloud Platform services
• GCP Messaging: Publish to and subcribe from Google Cloud Pub/Sub topics
• GCP Storage: Access Google Cloud Storage objects

I/O

• Batch: Spring Batch support
• Mail: Send email using Java Mail and Spring Framework's JavaMailSender
• Apache Camel: Integration using Apache Camel
• LDAP: LDAP support, including spring-data-ldap
• Quartz Scheduler: Schedule jobs using Quartz
• Spring Shell: Build shell-based clients
• Statemachine: Build applications using state machine concepts

Ops

• Actuator: Production ready features to help you monitor and manage your application
• Spring Boot Admin (Server): An admin interface for Spring Boot applications
• Spring Boot Admin (Client): Register your application with a Spring Boot Admin instance
• Actuator Docs: API documentation for the Actuator endpointsRequires Spring Boot >=1.5.0.RELEASE and <2.0.0.M1.