简化Spring应用开发的一个框架

整个Spring技术栈的一个大整合

J2EE开发的一站式解决方案

优点：

– 快速创建独立运行的Spring项目以及与主流框架集成

– 使用嵌入式的Servlet容器，应用无需打成WAR包 – starters自动依赖与版本控制

– 大量的自动配置，简化开发，也可修改默认值 – 无需配置XML，无代码生成，开箱即用

– 准生产环境的运行时应用监控

– 与云计算的天然集成

2.微服务

提出者：martin fowler

微服务：架构风格（服务微化）

一个应用应该是一组小型服务；可以通过HTTP的方式进行互通；

单体应用：ALL IN ONE

微服务：每一个功能元素最终都是一个可独立替换和独立升级的软件单元；

微服务文档：https://martinfowler.com/articles/microservices.html#MicroservicesAndSoa

3.环境准备

[1].JDK1.8

Spring Boot 推荐jdk1.7及以上；

java version "1.8.0_201"

C:WINDOWSsystem32>java -version

java version "1.8.0_201"

Java(TM) SE Runtime Environment (build 1.8.0_201-b09)

Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)

[2].Maven3.x

maven 3.3以上版本；

Apache Maven 3.3.9

C:WINDOWSsystem32>mvn -v

Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-11T00:41:47+08:00)

Maven home: D:DevInstallapache-maven-3.3.9

Java version: 1.8.0_201, vendor: Oracle Corporation

Java home: D:Program FilesJavajdk1.8.0_201jre

Default locale: zh_CN, platform encoding: GBK

OS name: "windows 10", version: "10.0", arch: "amd64", family: "dos"

Maven设置：给Maven的settings.xml配置文件的profiles标签添加

</profile>

-->

</activation>

<maven.compiler.source>1.8</maven.compiler.source>

<maven.compiler.target>1.8</maven.compiler.target>

<maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>

</properties>

</profile>

</profiles>

[3].IDEA2017

IntelliJ IDEA 2017.3.7 x64

STS

[4].Spring Boot

SpringBoot 1.5.9.RELEASE：1.5.9；

1. Spring Boot入门
1.Spring Boot简介
2.微服务
3.环境准备
4.Spring Boot HelloWorld
5.HelloWorld解析
6.使用Spring Initializer快速创建Spring Boot项目

IDEA设置

(1).整合Maven

Configure->settings

1. Spring Boot入门
1.Spring Boot简介
2.微服务
3.环境准备
4.Spring Boot HelloWorld
5.HelloWorld解析
6.使用Spring Initializer快速创建Spring Boot项目

4.Spring Boot HelloWorld

浏览器发送hello请求，服务器接受请求并处理，响应Hello World字符串；

[1].创建Maven工程

SDK选择我们安装的JDK位置即可

1. Spring Boot入门
1.Spring Boot简介
2.微服务
3.环境准备
4.Spring Boot HelloWorld
5.HelloWorld解析
6.使用Spring Initializer快速创建Spring Boot项目

[2].导入依赖spring Boot相关的依赖

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>1.5.9.RELEASE</version>

</parent>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-web</artifactId>

</dependency>

</dependencies>

[3].编写主程序main

/**

* @SpringBootApplication 来标注一个主程序类，说明这是一个Spring Boot应用

@SpringBootApplication

public class HelloWorldMainApplication {

public static void main(String[] args) {

// Spring应用启动起来

SpringApplication.run(HelloWorldMainApplication.class,args);

}

[4].编写Controller、Service

@Controller

public class HelloController {

@ResponseBody

@RequestMapping("/hello")

public String hello(){

return "Hello World!";

}

[5].运行主程序测试

[6].简化部署

将这个应用打成jar包，直接使用java -jar的命令进行执行；

<build>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-maven-plugin</artifactId>

</plugin>

</plugins>

</build>

5.HelloWorld解析

[1].POM文件

(1).父项目

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>1.5.9.RELEASE</version>

</parent>

它的父项目

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-dependencies</artifactId>

<version>1.5.9.RELEASE</version>

<relativePath>../../spring-boot-dependencies</relativePath>

</parent>

它是真正管理Spring Boot应用里面的所有依赖版本：

<activemq.version>5.14.5</activemq.version>

<antlr2.version>2.7.7</antlr2.version>

<appengine-sdk.version>1.9.59</appengine-sdk.version>

<artemis.version>1.5.5</artemis.version>

<aspectj.version>1.8.13</aspectj.version>

<assertj.version>2.6.0</assertj.version>

<atomikos.version>3.9.3</atomikos.version>

<bitronix.version>2.1.4</bitronix.version>

<caffeine.version>2.3.5</caffeine.version>

<cassandra-driver.version>3.1.4</cassandra-driver.version>

<classmate.version>1.3.4</classmate.version>

<commons-beanutils.version>1.9.3</commons-beanutils.version>

<commons-collections.version>3.2.2</commons-collections.version>

<commons-codec.version>1.10</commons-codec.version>

<commons-dbcp.version>1.4</commons-dbcp.version>

<commons-dbcp2.version>2.1.1</commons-dbcp2.version>

<commons-digester.version>2.1</commons-digester.version>

<commons-pool.version>1.6</commons-pool.version>

<commons-pool2.version>2.4.3</commons-pool2.version>

<couchbase-client.version>2.3.7</couchbase-client.version>

<couchbase-cache-client.version>2.1.0</couchbase-cache-client.version>

<crashub.version>1.3.2</crashub.version>

<derby.version>10.13.1.1</derby.version>

<dom4j.version>1.6.1</dom4j.version>

<dropwizard-metrics.version>3.1.5</dropwizard-metrics.version>

<ehcache.version>2.10.4</ehcache.version>

<ehcache3.version>3.2.3</ehcache3.version>

<embedded-mongo.version>1.50.5</embedded-mongo.version>

<flyway.version>3.2.1</flyway.version>

<freemarker.version>2.3.27-incubating</freemarker.version>

<elasticsearch.version>2.4.6</elasticsearch.version>

<gemfire.version>8.2.7</gemfire.version>

<glassfish-el.version>3.0.0</glassfish-el.version>

<gradle.version>2.9</gradle.version>

<groovy.version>2.4.13</groovy.version>

<gson.version>2.8.2</gson.version>

<h2.version>1.4.196</h2.version>

<hamcrest.version>1.3</hamcrest.version>

<hazelcast.version>3.7.8</hazelcast.version>

<hazelcast-hibernate4.version>3.7.1</hazelcast-hibernate4.version>

<hazelcast-hibernate5.version>1.1.3</hazelcast-hibernate5.version>

<hibernate.version>5.0.12.Final</hibernate.version>

<hibernate-validator.version>5.3.6.Final</hibernate-validator.version>

<hikaricp.version>2.5.1</hikaricp.version>

<hikaricp-java6.version>2.3.13</hikaricp-java6.version>

<hikaricp-java7.version>2.4.13</hikaricp-java7.version>

<hsqldb.version>2.3.5</hsqldb.version>

<htmlunit.version>2.21</htmlunit.version>

<httpasyncclient.version>4.1.3</httpasyncclient.version>

<httpclient.version>4.5.3</httpclient.version>

<httpcore.version>4.4.8</httpcore.version>

<infinispan.version>8.2.8.Final</infinispan.version>

<jackson.version>2.8.10</jackson.version>

<janino.version>2.7.8</janino.version>

<javassist.version>3.21.0-GA</javassist.version>

<javax-cache.version>1.0.0</javax-cache.version>

<javax-mail.version>1.5.6</javax-mail.version>

<javax-transaction.version>1.2</javax-transaction.version>

<javax-validation.version>1.1.0.Final</javax-validation.version>

<jaxen.version>1.1.6</jaxen.version>

<jaybird.version>2.2.13</jaybird.version>

<jboss-logging.version>3.3.1.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>2.9.0</jedis.version>

<jersey.version>2.25.1</jersey.version>

<jest.version>2.0.4</jest.version>

<jetty.version>9.4.7.v20170914</jetty.version>

<jetty-jsp.version>2.2.0.v201112011158</jetty-jsp.version>

<jetty-el.version>8.0.33</jetty-el.version>

<jms-api.version>1.1-rev-1</jms-api.version>

<jmustache.version>1.13</jmustache.version>

<jna.version>4.2.2</jna.version>

<joda-time.version>2.9.9</joda-time.version>

<jolokia.version>1.3.7</jolokia.version>

<jooq.version>3.9.6</jooq.version>

<json.version>20140107</json.version>

<jsonassert.version>1.4.0</jsonassert.version>

<json-path.version>2.2.0</json-path.version>

<jstl.version>1.2</jstl.version>

<jtds.version>1.3.1</jtds.version>

<junit.version>4.12</junit.version>

<liquibase.version>3.5.3</liquibase.version>

<log4j2.version>2.7</log4j2.version>

<logback.version>1.1.11</logback.version>

<lombok.version>1.16.18</lombok.version>

<mariadb.version>1.5.9</mariadb.version>

<mssql-jdbc.version>6.1.0.jre7</mssql-jdbc.version>

<mockito.version>1.10.19</mockito.version>

<mongodb.version>3.4.3</mongodb.version>

<mysql.version>5.1.44</mysql.version>

<narayana.version>5.5.30.Final</narayana.version>

<nekohtml.version>1.9.22</nekohtml.version>

<neo4j-ogm.version>2.1.5</neo4j-ogm.version>

<postgresql.version>9.4.1212.jre7</postgresql.version>

<querydsl.version>4.1.4</querydsl.version>

<reactor.version>2.0.8.RELEASE</reactor.version>

<reactor-spring.version>2.0.7.RELEASE</reactor-spring.version>

<selenium.version>2.53.1</selenium.version>

<selenium-htmlunit.version>2.21</selenium-htmlunit.version>

<sendgrid.version>2.2.2</sendgrid.version>

<servlet-api.version>3.1.0</servlet-api.version>

<simple-json.version>1.1.1</simple-json.version>

<slf4j.version>1.7.25</slf4j.version>

<snakeyaml.version>1.17</snakeyaml.version>

<solr.version>5.5.5</solr.version>

<spock.version>1.0-groovy-2.4</spock.version>

<spring.version>4.3.13.RELEASE</spring.version>

<spring-amqp.version>1.7.4.RELEASE</spring-amqp.version>

<spring-cloud-connectors.version>1.2.5.RELEASE</spring-cloud-connectors.version>

<spring-batch.version>3.0.8.RELEASE</spring-batch.version>

<spring-data-releasetrain.version>Ingalls-SR9</spring-data-releasetrain.version>

<spring-hateoas.version>0.23.0.RELEASE</spring-hateoas.version>

<spring-integration.version>4.3.12.RELEASE</spring-integration.version>

<spring-integration-java-dsl.version>1.2.3.RELEASE</spring-integration-java-dsl.version>

<spring-kafka.version>1.1.7.RELEASE</spring-kafka.version>

<spring-ldap.version>2.3.2.RELEASE</spring-ldap.version>

<spring-loaded.version>1.2.8.RELEASE</spring-loaded.version>

<spring-mobile.version>1.1.5.RELEASE</spring-mobile.version>

<spring-plugin.version>1.2.0.RELEASE</spring-plugin.version>

<spring-restdocs.version>1.1.3.RELEASE</spring-restdocs.version>

<spring-retry.version>1.2.1.RELEASE</spring-retry.version>

<spring-security.version>4.2.3.RELEASE</spring-security.version>

<spring-security-jwt.version>1.0.8.RELEASE</spring-security-jwt.version>

<spring-security-oauth.version>2.0.14.RELEASE</spring-security-oauth.version>

<spring-session.version>1.3.1.RELEASE</spring-session.version>

<spring-social.version>1.1.4.RELEASE</spring-social.version>

<spring-social-facebook.version>2.0.3.RELEASE</spring-social-facebook.version>

<spring-social-linkedin.version>1.0.2.RELEASE</spring-social-linkedin.version>

<spring-social-twitter.version>1.1.2.RELEASE</spring-social-twitter.version>

<spring-ws.version>2.4.2.RELEASE</spring-ws.version>

<sqlite-jdbc.version>3.15.1</sqlite-jdbc.version>

<statsd-client.version>3.1.0</statsd-client.version>

<sun-mail.version>${javax-mail.version}</sun-mail.version>

<thymeleaf.version>2.1.6.RELEASE</thymeleaf.version>

<thymeleaf-extras-springsecurity4.version>2.1.3.RELEASE</thymeleaf-extras-springsecurity4.version>

<thymeleaf-extras-conditionalcomments.version>2.1.2.RELEASE</thymeleaf-extras-conditionalcomments.version>

<thymeleaf-layout-dialect.version>1.4.0</thymeleaf-layout-dialect.version>

<thymeleaf-extras-data-attribute.version>1.3</thymeleaf-extras-data-attribute.version>

<thymeleaf-extras-java8time.version>2.1.0.RELEASE</thymeleaf-extras-java8time.version>

<tomcat.version>8.5.23</tomcat.version>

<undertow.version>1.4.21.Final</undertow.version>

<unboundid-ldapsdk.version>3.2.1</unboundid-ldapsdk.version>

<webjars-hal-browser.version>9f96c74</webjars-hal-browser.version>

<webjars-locator.version>0.32-1</webjars-locator.version>

<wsdl4j.version>1.6.3</wsdl4j.version>

<xml-apis.version>1.4.01</xml-apis.version>

<build-helper-maven-plugin.version>1.10</build-helper-maven-plugin.version>

<exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>

<git-commit-id-plugin.version>2.2.3</git-commit-id-plugin.version>

<maven-antrun-plugin.version>1.8</maven-antrun-plugin.version>

<maven-assembly-plugin.version>2.6</maven-assembly-plugin.version>

<maven-clean-plugin.version>2.6.1</maven-clean-plugin.version>

<maven-compiler-plugin.version>3.1</maven-compiler-plugin.version>

<maven-dependency-plugin.version>2.10</maven-dependency-plugin.version>

<maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version>

<maven-eclipse-plugin.version>2.10</maven-eclipse-plugin.version>

<maven-enforcer-plugin.version>1.4</maven-enforcer-plugin.version>

<maven-failsafe-plugin.version>2.18.1</maven-failsafe-plugin.version>

<maven-install-plugin.version>2.5.2</maven-install-plugin.version>

<maven-invoker-plugin.version>1.10</maven-invoker-plugin.version>

<maven-help-plugin.version>2.2</maven-help-plugin.version>

<maven-jar-plugin.version>2.6</maven-jar-plugin.version>

<maven-javadoc-plugin.version>2.10.4</maven-javadoc-plugin.version>

<maven-resources-plugin.version>2.7</maven-resources-plugin.version>

<maven-shade-plugin.version>2.4.3</maven-shade-plugin.version>

<maven-site-plugin.version>3.5.1</maven-site-plugin.version>

<maven-source-plugin.version>2.4</maven-source-plugin.version>

<maven-surefire-plugin.version>2.18.1</maven-surefire-plugin.version>

<maven-war-plugin.version>2.6</maven-war-plugin.version>

<versions-maven-plugin.version>2.2</versions-maven-plugin.version>

</properties>

Spring Boot的版本中心；

以后我们导入依赖默认是不需要写版本；（没有在dependencies里面管理的依赖自然需要声明版本号）

(2).启动器

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-web</artifactId>

</dependency>

</dependencies>

spring-boot-starter-web：Spring-boot场景启动器,帮我们导入了web模块正常运行所依赖的组件.

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter</artifactId>

</dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-tomcat</artifactId>

</dependency>

<groupId>org.hibernate</groupId>

<artifactId>hibernate-validator</artifactId>

</dependency>

<groupId>com.fasterxml.jackson.core</groupId>

<artifactId>jackson-databind</artifactId>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-webmvc</artifactId>

</dependency>

Spring Boot将所有的功能场景都抽取出来，做成一个个的starters（启动器），只需要在项目里面引入这些starter相关场景的所有依赖都会导入进来。要用什么功能就导入什么场景的启动器

[2].主程序类(主入口类)

/**

* @SpringBootApplication 来标注一个主程序类说明这是一个Spring boot应用

@SpringBootApplication

public class HelloWorldMainApplication {

public static void main(String[] args) {

//Spring应用启动起来

SpringApplication.run(HelloWorldMainApplication.class,args);

}

@SpringBootApplication: Spring Boot应用标注在某个类上说明这个类是SpringBoot的主配置类，SpringBoot就应该运行这个类的main方法来启动SpringBoot应用；

@Target(ElementType.TYPE)

@Retention(RetentionPolicy.RUNTIME)

@Documented

@Inherited

@SpringBootConfiguration

@EnableAutoConfiguration

@ComponentScan(excludeFilters = {

@Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),

@Filter(type = FilterType.CUSTOM, classes = AutoConfigurationExcludeFilter.class) })

public @interface SpringBootApplication {

@SpringBootConfiguration：Spring Boot的配置类；

标注在某个类上，表示这是一个Spring Boot的配置类

|- @Configuration:配置类上来标注这个注解；

配置类 ----- 配置文件；

配置类也是容器中的一个组件；

|- @Component

@EnableAutoConfiguration：开启自动配置功能；

以前我们需要配置的东西，Spring Boot帮我们自动配置；@EnableAutoConfiguration告诉SpringBoot开启自动配置功能；这样自动配置才能生效；

@AutoConfigurationPackage

@Import(EnableAutoConfigurationImportSelector.class)

public @interface EnableAutoConfiguration {}

@AutoConfigurationPackage：自动配置包；

|- @Import(AutoConfigurationPackages.Registrar.class)

Spring的底层注解@Import，给容器中导入一个组件；导入的组件由AutoConfigurationPackages.Registrar.class；

将主配置类（@SpringBootApplication标注的类）的所在包及下面所有子包里面的所有组件扫描到Spring容器；

public void registerBeanDefinitions(AnnotationMetadata metadata, BeanDefinitionRegistry registry) {

AutoConfigurationPackages.register(registry, (new AutoConfigurationPackages.PackageImport(metadata)).getPackageName());

}

@Import({EnableAutoConfigurationImportSelector.class})：给容器中导入组件;

|- EnableAutoConfigurationImportSelector:导入那些组件的选择器

将所有需要导入的组件以全类名的方式返回；这些组件就会被添加到容器中；

会给容器中导入非常多的自动配置类（xxxAutoConfiguration）；就是给容器中导入这个场景需要的所有组件，并配置好这些组件；

public String[] selectImports(AnnotationMetadata annotationMetadata) {

if (!this.isEnabled(annotationMetadata)) {

return NO_IMPORTS;

} else {

try {

AutoConfigurationMetadata autoConfigurationMetadata = AutoConfigurationMetadataLoader.loadMetadata(this.beanClassLoader);

AnnotationAttributes attributes = this.getAttributes(annotationMetadata);

List<String> configurations = this.getCandidateConfigurations(annotationMetadata, attributes);

configurations = this.removeDuplicates(configurations);

configurations = this.sort(configurations, autoConfigurationMetadata);

Set<String> exclusions = this.getExclusions(annotationMetadata, attributes);

this.checkExcludedClasses(configurations, exclusions);

configurations.removeAll(exclusions);

configurations = this.filter(configurations, autoConfigurationMetadata);

this.fireAutoConfigurationImportEvents(configurations, exclusions);

return (String[])configurations.toArray(new String[configurations.size()]);

} catch (IOException var6) {

throw new IllegalStateException(var6);

}

1. Spring Boot入门
1.Spring Boot简介
2.微服务
3.环境准备
4.Spring Boot HelloWorld
5.HelloWorld解析
6.使用Spring Initializer快速创建Spring Boot项目

有了自动配置类，免去了我们手动编写配置注入功能组件等的工作；

SpringFactoriesLoader.loadFactoryNames(EnableAutoConfiguration.class,classLoader)；

Spring Boot在启动的时候从类路径下的META-INF/spring.factories中获取EnableAutoConfiguration指定的值，将这些值作为自动配置类导入到容器中，自动配置类就生效，帮我们进行自动配置工作；以前我们需要自己配置的东西，自动配置类都帮我们；

J2EE的整体整合解决方案和自动配置都在spring-boot-autoconfigure-1.5.9.RELEASE.jar；

1. Spring Boot入门
1.Spring Boot简介
2.微服务
3.环境准备
4.Spring Boot HelloWorld
5.HelloWorld解析
6.使用Spring Initializer快速创建Spring Boot项目

6.使用Spring Initializer快速创建Spring Boot项目

[1].IDEA：使用 Spring Initializer快速创建项目

1. Spring Boot入门
1.Spring Boot简介
2.微服务
3.环境准备
4.Spring Boot HelloWorld
5.HelloWorld解析
6.使用Spring Initializer快速创建Spring Boot项目

IDE都支持使用Spring的项目创建向导快速创建一个Spring Boot项目；

选择我们需要的模块；向导会联网创建Spring Boot项目；

1. Spring Boot入门
1.Spring Boot简介
2.微服务
3.环境准备
4.Spring Boot HelloWorld
5.HelloWorld解析
6.使用Spring Initializer快速创建Spring Boot项目

默认生成的Spring Boot项目；

- 主程序已经生成好了，我们只需要我们自己的逻辑

- resources文件夹中目录结构

- static：保存所有的静态资源； js css images；

- templates：保存所有的模板页面；（Spring Boot默认jar包使用嵌入式的Tomcat，默认不支持JSP页面）；可以使用模板引擎（freemarker、thymeleaf）；

- application.properties：Spring Boot应用的配置文件；可以修改一些默认设置；

[2].STS使用Spring Starter Project快速创建项目

参考文档：https://docs.spring.io/spring-boot/docs/1.5.9.RELEASE/reference/htmlsingle/

1. Spring Boot入门 1.Spring Boot简介 2.微服务 3.环境准备 4.Spring Boot HelloWorld 5.HelloWorld解析 6.使用Spring Initializer快速创建Spring Boot项目

2.微服务

3.环境准备

4.Spring Boot HelloWorld

5.HelloWorld解析

6.使用Spring Initializer快速创建Spring Boot项目

相关推荐