SpringBoot源码深度解析
Spring开源框架,解决企业级开发的复杂性的问题,简化开发AOP, IOCSpring 配置越来多,配置不方便管理!
Javaweb---Servlet+tomcat + Struct2 SpringMVC SPRINGboot.....
所有的技术框架:从一个复杂的场景慢慢的衍生出来一种规范!简单的配置!
==SpringBoot :自动配置!==
Springboot怎么自动配置,核心原理!当之无愧的Java领域最热门的技术!公司,怎么演进架构!
1、 版本控制
资源控制
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.1.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent>
资源控制
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>2.2.1.RELEASE</version> <relativePath>../../spring-boot-dependencies</relativePath> </parent> <properties> <activemq.version>5.15.10</activemq.version> <antlr2.version>2.7.7</antlr2.version> <appengine-sdk.version>1.9.76</appengine-sdk.version> <artemis.version>2.10.1</artemis.version> <aspectj.version>1.9.4</aspectj.version> <assertj.version>3.13.2</assertj.version> <atomikos.version>4.0.6</atomikos.version> <awaitility.version>4.0.1</awaitility.version> <bitronix.version>2.1.4</bitronix.version> <build-helper-maven-plugin.version>3.0.0</build-helper-maven-plugin.version> <byte-buddy.version>1.10.2</byte-buddy.version> <caffeine.version>2.8.0</caffeine.version> <cassandra-driver.version>3.7.2</cassandra-driver.version> <classmate.version>1.5.1</classmate.version> <commons-codec.version>1.13</commons-codec.version> <commons-dbcp2.version>2.7.0</commons-dbcp2.version> <commons-lang3.version>3.9</commons-lang3.version> <commons-pool.version>1.6</commons-pool.version> <commons-pool2.version>2.7.0</commons-pool2.version> <couchbase-cache-client.version>2.1.0</couchbase-cache-client.version> <couchbase-client.version>2.7.9</couchbase-client.version> <db2-jdbc.version>11.5.0.0</db2-jdbc.version> <dependency-management-plugin.version>1.0.8.RELEASE</dependency-management-plugin.version> <derby.version>10.14.2.0</derby.version> <dropwizard-metrics.version>4.1.1</dropwizard-metrics.version> <ehcache.version>2.10.6</ehcache.version> <ehcache3.version>3.8.1</ehcache3.version> <elasticsearch.version>6.8.4</elasticsearch.version> <embedded-mongo.version>2.2.0</embedded-mongo.version> <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version> <flatten-maven-plugin.version>1.1.0</flatten-maven-plugin.version> <flyway.version>6.0.8</flyway.version> <freemarker.version>2.3.29</freemarker.version> <git-commit-id-plugin.version>3.0.1</git-commit-id-plugin.version> <glassfish-el.version>3.0.3</glassfish-el.version> <glassfish-jaxb.version>2.3.2</glassfish-jaxb.version> <groovy.version>2.5.8</groovy.version> <gson.version>2.8.6</gson.version> <h2.version>1.4.200</h2.version> <hamcrest.version>2.1</hamcrest.version> <hazelcast.version>3.12.4</hazelcast.version> <hazelcast-hibernate5.version>1.3.2</hazelcast-hibernate5.version> <hibernate.version>5.4.8.Final</hibernate.version> <hibernate-validator.version>6.0.18.Final</hibernate-validator.version> <hikaricp.version>3.4.1</hikaricp.version> <hsqldb.version>2.5.0</hsqldb.version> <htmlunit.version>2.36.0</htmlunit.version> <httpasyncclient.version>4.1.4</httpasyncclient.version> <httpclient.version>4.5.10</httpclient.version> <httpcore.version>4.4.12</httpcore.version> <infinispan.version>9.4.16.Final</infinispan.version> <influxdb-java.version>2.15</influxdb-java.version> <jackson.version>2.10.0</jackson.version> <jackson-bom.version>${jackson.version}</jackson-bom.version> <jakarta-activation.version>1.2.1</jakarta-activation.version> <jakarta-annotation.version>1.3.5</jakarta-annotation.version> <jakarta-jms.version>2.0.3</jakarta-jms.version> <jakarta-json.version>1.1.6</jakarta-json.version> <jakarta-json-bind.version>1.0.2</jakarta-json-bind.version> <jakarta-mail.version>1.6.4</jakarta-mail.version> <jakarta-persistence.version>2.2.3</jakarta-persistence.version> <jakarta-servlet.version>4.0.3</jakarta-servlet.version> <jakarta-servlet-jsp.version>2.3.5</jakarta-servlet-jsp.version> <jakarta-servlet-jsp-jstl.version>1.2.7</jakarta-servlet-jsp-jstl.version> <jakarta-transaction.version>1.3.3</jakarta-transaction.version> <jakarta-validation.version>2.0.1</jakarta-validation.version> <jakarta-websocket.version>1.1.2</jakarta-websocket.version> <jakarta-ws-rs.version>2.1.6</jakarta-ws-rs.version> <jakarta-xml-bind.version>2.3.2</jakarta-xml-bind.version> <jakarta-xml-ws.version>2.3.2</jakarta-xml-ws.version> <janino.version>3.1.0</janino.version> <javax-activation.version>1.2.0</javax-activation.version> <javax-annotation.version>1.3.2</javax-annotation.version> <javax-cache.version>1.1.1</javax-cache.version> <javax-jaxb.version>2.3.1</javax-jaxb.version> <javax-jaxws.version>2.3.1</javax-jaxws.version> <javax-jms.version>2.0.1</javax-jms.version> <javax-json.version>1.1.4</javax-json.version> <javax-jsonb.version>1.0</javax-jsonb.version> <javax-mail.version>1.6.2</javax-mail.version> <javax-money.version>1.0.3</javax-money.version> <javax-persistence.version>2.2</javax-persistence.version> <javax-transaction.version>1.3</javax-transaction.version> <javax-validation.version>2.0.1.Final</javax-validation.version> <javax-websocket.version>1.1</javax-websocket.version> <jaxen.version>1.2.0</jaxen.version> <jaybird.version>3.0.6</jaybird.version> <jboss-logging.version>3.4.1.Final</jboss-logging.version> <jboss-transaction-spi.version>7.6.0.Final</jboss-transaction-spi.version> <jdom2.version>2.0.6</jdom2.version> <jedis.version>3.1.0</jedis.version> <jersey.version>2.29.1</jersey.version> <jest.version>6.3.1</jest.version> <jetty.version>9.4.22.v20191022</jetty.version> <jetty-el.version>8.5.40</jetty-el.version> <jetty-jsp.version>2.2.0.v201112011158</jetty-jsp.version> <jetty-reactive-httpclient.version>1.0.3</jetty-reactive-httpclient.version> <jmustache.version>1.15</jmustache.version> <jna.version>4.5.2</jna.version> <joda-time.version>2.10.5</joda-time.version> <johnzon.version>${johnzon-jsonb.version}</johnzon.version> <johnzon-jsonb.version>1.2.1</johnzon-jsonb.version> <jolokia.version>1.6.2</jolokia.version> <jooq.version>3.12.3</jooq.version> <jsonassert.version>1.5.0</jsonassert.version> <json-path.version>2.4.0</json-path.version> <jstl.version>1.2</jstl.version> <jtds.version>1.3.1</jtds.version> <junit.version>4.12</junit.version> <junit-jupiter.version>5.5.2</junit-jupiter.version> <kafka.version>2.3.1</kafka.version> <kotlin.version>1.3.50</kotlin.version> <kotlin-coroutines.version>1.3.2</kotlin-coroutines.version> <lettuce.version>5.2.1.RELEASE</lettuce.version> <liquibase.version>3.8.0</liquibase.version> <log4j2.version>2.12.1</log4j2.version> <logback.version>1.2.3</logback.version> <lombok.version>1.18.10</lombok.version> <mariadb.version>2.4.4</mariadb.version> <maven-antrun-plugin.version>1.8</maven-antrun-plugin.version> <maven-assembly-plugin.version>3.1.1</maven-assembly-plugin.version> <maven-clean-plugin.version>3.1.0</maven-clean-plugin.version> <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version> <maven-dependency-plugin.version>3.1.1</maven-dependency-plugin.version> <maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version> <maven-enforcer-plugin.version>3.0.0-M2</maven-enforcer-plugin.version> <maven-failsafe-plugin.version>2.22.2</maven-failsafe-plugin.version> <maven-help-plugin.version>3.2.0</maven-help-plugin.version> <maven-install-plugin.version>2.5.2</maven-install-plugin.version> <maven-invoker-plugin.version>3.2.1</maven-invoker-plugin.version> <maven-jar-plugin.version>3.1.2</maven-jar-plugin.version> <maven-javadoc-plugin.version>3.1.1</maven-javadoc-plugin.version> <maven-resources-plugin.version>3.1.0</maven-resources-plugin.version> <maven-shade-plugin.version>3.2.1</maven-shade-plugin.version> <maven-site-plugin.version>3.8.2</maven-site-plugin.version> <maven-source-plugin.version>3.1.0</maven-source-plugin.version> <maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version> <maven-war-plugin.version>3.2.3</maven-war-plugin.version> <micrometer.version>1.3.1</micrometer.version> <mimepull.version>1.9.12</mimepull.version> <mockito.version>3.1.0</mockito.version> <mongodb.version>3.11.2</mongodb.version> <mongo-driver-reactivestreams.version>1.12.0</mongo-driver-reactivestreams.version> <mssql-jdbc.version>7.4.1.jre8</mssql-jdbc.version> <mysql.version>8.0.18</mysql.version> <nekohtml.version>1.9.22</nekohtml.version> <neo4j-ogm.version>3.2.2</neo4j-ogm.version> <netty.version>4.1.43.Final</netty.version> <netty-tcnative.version>2.0.26.Final</netty-tcnative.version> <nio-multipart-parser.version>1.1.0</nio-multipart-parser.version> <ojdbc.version>19.3.0.0</ojdbc.version> <okhttp3.version>3.14.4</okhttp3.version> <pooled-jms.version>1.0.6</pooled-jms.version> <postgresql.version>42.2.8</postgresql.version> <prometheus-pushgateway.version>0.7.0</prometheus-pushgateway.version> <quartz.version>2.3.2</quartz.version> <querydsl.version>4.2.1</querydsl.version> <rabbit-amqp-client.version>5.7.3</rabbit-amqp-client.version> <reactive-streams.version>1.0.3</reactive-streams.version> <reactor-bom.version>Dysprosium-SR1</reactor-bom.version> <rest-assured.version>3.3.0</rest-assured.version> <rsocket.version>1.0.0-RC5</rsocket.version> <rxjava.version>1.3.8</rxjava.version> <rxjava2.version>2.2.14</rxjava2.version> <rxjava-adapter.version>1.2.1</rxjava-adapter.version> <saaj-impl.version>1.5.1</saaj-impl.version> <selenium.version>3.141.59</selenium.version> <selenium-htmlunit.version>2.36.0</selenium-htmlunit.version> <sendgrid.version>4.4.1</sendgrid.version> <servlet-api.version>4.0.1</servlet-api.version> <slf4j.version>1.7.29</slf4j.version> <snakeyaml.version>1.25</snakeyaml.version> <solr.version>8.2.0</solr.version> <spring-amqp.version>2.2.1.RELEASE</spring-amqp.version> <spring-batch.version>4.2.0.RELEASE</spring-batch.version> <spring-cloud-connectors.version>2.0.6.RELEASE</spring-cloud-connectors.version> <spring-data-releasetrain.version>Moore-SR1</spring-data-releasetrain.version> <spring-framework.version>5.2.1.RELEASE</spring-framework.version> <spring-hateoas.version>1.0.1.RELEASE</spring-hateoas.version> <spring-integration.version>5.2.1.RELEASE</spring-integration.version> <spring-kafka.version>2.3.3.RELEASE</spring-kafka.version> <spring-ldap.version>2.3.2.RELEASE</spring-ldap.version> <spring-restdocs.version>2.0.4.RELEASE</spring-restdocs.version> <spring-retry.version>1.2.4.RELEASE</spring-retry.version> <spring-security.version>5.2.1.RELEASE</spring-security.version> <spring-session-bom.version>Corn-RELEASE</spring-session-bom.version> <spring-ws.version>3.0.8.RELEASE</spring-ws.version> <sqlite-jdbc.version>3.28.0</sqlite-jdbc.version> <sun-mail.version>${jakarta-mail.version}</sun-mail.version> <thymeleaf.version>3.0.11.RELEASE</thymeleaf.version> <thymeleaf-extras-data-attribute.version>2.0.1</thymeleaf-extras-data-attribute.version> <thymeleaf-extras-java8time.version>3.0.4.RELEASE</thymeleaf-extras-java8time.version> <thymeleaf-extras-springsecurity.version>3.0.4.RELEASE</thymeleaf-extras-springsecurity.version> <thymeleaf-layout-dialect.version>2.4.1</thymeleaf-layout-dialect.version> <tomcat.version>9.0.27</tomcat.version> <unboundid-ldapsdk.version>4.0.12</unboundid-ldapsdk.version> <undertow.version>2.0.27.Final</undertow.version> <versions-maven-plugin.version>2.7</versions-maven-plugin.version> <webjars-hal-browser.version>3325375</webjars-hal-browser.version> <webjars-locator-core.version>0.41</webjars-locator-core.version> <wsdl4j.version>1.6.3</wsdl4j.version> <xml-maven-plugin.version>1.0.2</xml-maven-plugin.version> <xmlunit2.version>2.6.3</xmlunit2.version> </properties>
pom.xml 就是springboot的版本控制中心!
假设里面有默认的配置,我们就不需手动配置版本了,假设没有,我们才需要手动配置!
2、 启动器
package com.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; //程序的主入口 @SpringBootApplication //Springboot应用 public class DemoApplication { public static void main(String[] args) { //开启了一个服务! SpringApplication.run(DemoApplication.class, args); } }
applicationContext.xml == @Configuration
bean == @Bean
import == @Import
所有的包,必须在主启动类的同级或子级目录!为什么?
protected List<String> getCandidateConfigurations(AnnotationMetadata metadata, AnnotationAttributes attributes) { List<String> configurations = SpringFactoriesLoader.loadFactoryNames(getSpringFactoriesLoaderFactoryClass(), getBeanClassLoader()); Assert.notEmpty(configurations, "No auto configuration classes found in META-INF/spring.factories. If you " + "are using a custom packaging, make sure that file is correct."); return configurations; }
# Auto Configure org.springframework.boot.autoconfigure.EnableAutoConfiguration=\ org.springframework.boot.autoconfigure.admin.SpringApplicationAdminJmxAutoConfiguration,\ org.springframework.boot.autoconfigure.aop.AopAutoConfiguration,\ org.springframework.boot.autoconfigure.amqp.RabbitAutoConfiguration,\ org.springframework.boot.autoconfigure.batch.BatchAutoConfiguration,\ org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration,\ org.springframework.boot.autoconfigure.cassandra.CassandraAutoConfiguration,\ org.springframework.boot.autoconfigure.cloud.CloudServiceConnectorsAutoConfiguration,\ org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration,\ org.springframework.boot.autoconfigure.context.MessageSourceAutoConfiguration,\ org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration,\ org.springframework.boot.autoconfigure.couchbase.CouchbaseAutoConfiguration,\ org.springframework.boot.autoconfigure.dao.PersistenceExceptionTranslationAutoConfiguration,\ org.springframework.boot.autoconfigure.data.cassandra.CassandraDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.cassandra.CassandraReactiveDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.cassandra.CassandraReactiveRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.cassandra.CassandraRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.couchbase.CouchbaseDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.couchbase.CouchbaseReactiveDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.couchbase.CouchbaseReactiveRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.couchbase.CouchbaseRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchAutoConfiguration,\ org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.elasticsearch.ReactiveElasticsearchRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.elasticsearch.ReactiveRestClientAutoConfiguration,\ org.springframework.boot.autoconfigure.data.jdbc.JdbcRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.ldap.LdapRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.mongo.MongoDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.mongo.MongoReactiveDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.mongo.MongoReactiveRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.mongo.MongoRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.neo4j.Neo4jDataAutoConfiguration,\ org.springframework.boot.autoconfigure.data.neo4j.Neo4jRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.solr.SolrRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration,\ org.springframework.boot.autoconfigure.data.redis.RedisReactiveAutoConfiguration,\ org.springframework.boot.autoconfigure.data.redis.RedisRepositoriesAutoConfiguration,\ org.springframework.boot.autoconfigure.data.rest.RepositoryRestMvcAutoConfiguration,\ org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration,\ org.springframework.boot.autoconfigure.elasticsearch.jest.JestAutoConfiguration,\ org.springframework.boot.autoconfigure.elasticsearch.rest.RestClientAutoConfiguration,\ org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration,\ org.springframework.boot.autoconfigure.freemarker.FreeMarkerAutoConfiguration,\ org.springframework.boot.autoconfigure.gson.GsonAutoConfiguration,\ org.springframework.boot.autoconfigure.h2.H2ConsoleAutoConfiguration,\ org.springframework.boot.autoconfigure.hateoas.HypermediaAutoConfiguration,\ org.springframework.boot.autoconfigure.hazelcast.HazelcastAutoConfiguration,\ org.springframework.boot.autoconfigure.hazelcast.HazelcastJpaDependencyAutoConfiguration,\ org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration,\ org.springframework.boot.autoconfigure.http.codec.CodecsAutoConfiguration,\ org.springframework.boot.autoconfigure.influx.InfluxDbAutoConfiguration,\ org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration,\ org.springframework.boot.autoconfigure.integration.IntegrationAutoConfiguration,\ org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.JndiDataSourceAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.XADataSourceAutoConfiguration,\ org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration,\ org.springframework.boot.autoconfigure.jms.JmsAutoConfiguration,\ org.springframework.boot.autoconfigure.jmx.JmxAutoConfiguration,\ org.springframework.boot.autoconfigure.jms.JndiConnectionFactoryAutoConfiguration,\ org.springframework.boot.autoconfigure.jms.activemq.ActiveMQAutoConfiguration,\ org.springframework.boot.autoconfigure.jms.artemis.ArtemisAutoConfiguration,\ org.springframework.boot.autoconfigure.groovy.template.GroovyTemplateAutoConfiguration,\ org.springframework.boot.autoconfigure.jersey.JerseyAutoConfiguration,\ org.springframework.boot.autoconfigure.jooq.JooqAutoConfiguration,\ org.springframework.boot.autoconfigure.jsonb.JsonbAutoConfiguration,\ org.springframework.boot.autoconfigure.kafka.KafkaAutoConfiguration,\ org.springframework.boot.autoconfigure.ldap.embedded.EmbeddedLdapAutoConfiguration,\ org.springframework.boot.autoconfigure.ldap.LdapAutoConfiguration,\ org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration,\ org.springframework.boot.autoconfigure.mail.MailSenderAutoConfiguration,\ org.springframework.boot.autoconfigure.mail.MailSenderValidatorAutoConfiguration,\ org.springframework.boot.autoconfigure.mongo.embedded.EmbeddedMongoAutoConfiguration,\ org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration,\ org.springframework.boot.autoconfigure.mongo.MongoReactiveAutoConfiguration,\ org.springframework.boot.autoconfigure.mustache.MustacheAutoConfiguration,\ org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration,\ org.springframework.boot.autoconfigure.quartz.QuartzAutoConfiguration,\ org.springframework.boot.autoconfigure.rsocket.RSocketMessagingAutoConfiguration,\ org.springframework.boot.autoconfigure.rsocket.RSocketRequesterAutoConfiguration,\ org.springframework.boot.autoconfigure.rsocket.RSocketServerAutoConfiguration,\ org.springframework.boot.autoconfigure.rsocket.RSocketStrategiesAutoConfiguration,\ org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration,\ org.springframework.boot.autoconfigure.security.servlet.UserDetailsServiceAutoConfiguration,\ org.springframework.boot.autoconfigure.security.servlet.SecurityFilterAutoConfiguration,\ org.springframework.boot.autoconfigure.security.reactive.ReactiveSecurityAutoConfiguration,\ org.springframework.boot.autoconfigure.security.reactive.ReactiveUserDetailsServiceAutoConfiguration,\ org.springframework.boot.autoconfigure.security.rsocket.RSocketSecurityAutoConfiguration,\ org.springframework.boot.autoconfigure.security.saml2.Saml2RelyingPartyAutoConfiguration,\ org.springframework.boot.autoconfigure.sendgrid.SendGridAutoConfiguration,\ org.springframework.boot.autoconfigure.session.SessionAutoConfiguration,\ org.springframework.boot.autoconfigure.security.oauth2.client.servlet.OAuth2ClientAutoConfiguration,\ org.springframework.boot.autoconfigure.security.oauth2.client.reactive.ReactiveOAuth2ClientAutoConfiguration,\ org.springframework.boot.autoconfigure.security.oauth2.resource.servlet.OAuth2ResourceServerAutoConfiguration,\ org.springframework.boot.autoconfigure.security.oauth2.resource.reactive.ReactiveOAuth2ResourceServerAutoConfiguration,\ org.springframework.boot.autoconfigure.solr.SolrAutoConfiguration,\ org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration,\ org.springframework.boot.autoconfigure.task.TaskSchedulingAutoConfiguration,\ org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration,\ org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration,\ org.springframework.boot.autoconfigure.transaction.jta.JtaAutoConfiguration,\ org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration,\ org.springframework.boot.autoconfigure.web.client.RestTemplateAutoConfiguration,\ org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration,\ org.springframework.boot.autoconfigure.web.reactive.HttpHandlerAutoConfiguration,\ org.springframework.boot.autoconfigure.web.reactive.ReactiveWebServerFactoryAutoConfiguration,\ org.springframework.boot.autoconfigure.web.reactive.WebFluxAutoConfiguration,\ org.springframework.boot.autoconfigure.web.reactive.error.ErrorWebFluxAutoConfiguration,\ org.springframework.boot.autoconfigure.web.reactive.function.client.ClientHttpConnectorAutoConfiguration,\ org.springframework.boot.autoconfigure.web.reactive.function.client.WebClientAutoConfiguration,\ org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration,\ org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration,\ org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration,\ org.springframework.boot.autoconfigure.web.servlet.HttpEncodingAutoConfiguration,\ org.springframework.boot.autoconfigure.web.servlet.MultipartAutoConfiguration,\ org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration,\ org.springframework.boot.autoconfigure.websocket.reactive.WebSocketReactiveAutoConfiguration,\ org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration,\ org.springframework.boot.autoconfigure.websocket.servlet.WebSocketMessagingAutoConfiguration,\ org.springframework.boot.autoconfigure.webservices.WebServicesAutoConfiguration,\ org.springframework.boot.autoconfigure.webservices.client.WebServiceTemplateA
在springboot已启动,它就自动帮我们配置了以上全部的类!但是真的都生效的了?
WebMvcAutoConfiguration.xml
bean
怎么自动配置的?
3、SpringApplication
-
推断我们的应用是web应用还是 普通应用!
-
加载初始化!
-
设置监听器
-
推断main方法,找到运行的主类
run方法()核心!
4、YAML
但为了强调这种语言以数据做为中心
字面量键值对:
k: (空格) value
对象,map
# 语法 k: v1: v2: # 例子 student: name: coding age: 3 student: {name: coding, age: 3}
数组(List,Set)
#语法 pets: - cat - dog - pig pets: [cat,dog,pig]
@ConfigurationProperties :SpringBoot自动配置底层全部都是这个注解
精髓
@ConditionalOnXXX根据这个类中不同的条件判断这个类是否生效!
-
一旦这个配置类生效,这个配置类就会往容器中添加各种组件!
-
这些个组件,都可以和xxxProerties绑定,而 xxProerties @ConfigurationProperties 和我们的配置文件绑定,所以说,我们只需要少量配置就可以实现功能了,假设不配置,就会使用springboot 的默认配置
-
Springboot中存在大量自动动配置类
但是这些类不一定生效! @ConditionalOnXXX
-
xxxAutoConfiguration,自动配置类
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xxxProperties,配置类 @ConfigurationProperties 组合
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实现和我们的配置一一对应,我们假设没有配置就使用自动配置,如果配置了,就使用我们自动配置的!
架构演进推演
聊聊过去和未来!
三层架构 mvc 架构---> 结构 开发框架 Spring IOC:控制反转思想 DI 约泡: 泡温泉,泡茶,。。。。泡友 附近的人,打招呼,加微信,聊聊天天聊,,,,,约泡 手动实现,一步步new 浴场: 温泉,茶庄的... 容器(get 拿) 直接有泡友了! 原来需要一步步自己去操作,现在交个容器了,我们需要什么区拿就可以了! AOP: 面向切面 (动态代理) 不影响原来业务的情况下,动态增加功能,日志,事务,安全///. 解决企业开发的复杂性 Spring 春天,简化了开发,随着时间的推移,开始慢慢的复杂起来,配置文件变多! SpringBoot SpringBoot 并不是新的东西,就是Spring升级版! 新一代JavaEE开发标准,开箱即用! 自动配置=====核心原理! 约定大于配置 单体架构 all in one 微服务架构---新架构 模块化,功能化! 代码没有变化,网络问题 微服务架构的问题? 4步曲 1. 这么多服务,客户端如何去访问? 2. 这么多服务,服务之间如何通信? 3. 这么多服务,怎么治理? 4. 这么多服务,服务挂了怎么办? SpringCloud, 生态., 解决方案: 1. Spring Cloud Netflix 一站式解决方案 api:----zuul Feign---》 HttpClient =-- Http 的同学方式,同步并阻塞 服务注册与发现====》Eureka 熔断机制====》Hystrix Netflix 2018,宣布无限期停止维护! 2. Apache Dubbo + Zookeeper 不完善! API;没有 借助别人的或者自己写 Dubbo:异步非阻塞 RPC 服务注册与发现: Zookeeper (Hadoop,Hive。。。) 熔断机制没有。借助 Hystrix 3. Spring Cloud Alibaba 一站式解决方案! 目前又推出新一代的服务网格概念 下一代的服务标准: Server Mesh 服务网格 Istio:未来需要掌握 1 1.8 裁员对于优秀的人来说是好事! 万变不离其宗!一通百通! 1. 这么多服务,客户端如何去访问? 2. 这么多服务,服务之间如何通信? 3. 这么多服务,怎么治理? 4. 这么多服务,服务挂了怎么办? 如果你们机遇这些问题,开发出来一套解决方案! 投资自己 为什么要解决这问题: 本质: 网络是不可靠的! 高级程序猿 程序猿---项目经理---架构师----CTO---CEO 架构:设计出来,衍生出来的! 架是一个逐步演进的过程!架构没有最好的,只有最合适! ----------------------- 当下进阶的一个任务! 1、 定义当前企业的架构,所处的阶段,绘制出一个架构图(完成) 2、 清晰定位当前公司的一个状况!根据企业的实际情况绘制出新的架构图(重构!) 分布式 高可用 集群 负载均衡 .....
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