两种方式快速创建一个spring boot的MAVEN工程

一、使用<parent>标签继承父模块

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/>
    </parent>

绝大多数工程都是采用此方法引入spring boot工程的依赖，下面我们就来看下spring-boot-starter-parent到底有什么内容。

<?xml version="1.0" encoding="utf-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-dependencies</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath>../../spring-boot-dependencies</relativePath>
    </parent>
    <artifactId>spring-boot-starter-parent</artifactId>
    <packaging>pom</packaging>
    <name>Spring Boot Starter Parent</name>
    <description>Parent pom providing dependency and plugin management for applications
        built with Maven</description>
    <url>https://projects.spring.io/spring-boot/#/spring-boot-starter-parent</url>
    <properties>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <resource.delimiter>@</resource.delimiter>
        <maven.compiler.source>${java.version}</maven.compiler.source>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.target>${java.version}</maven.compiler.target>
    </properties>
    <build>
        <resources>
            <resource>
                <filtering>true</filtering>
                <directory>${basedir}/src/main/resources</directory>
                <includes>
                    <include>**/application*.yml</include>
                    <include>**/application*.yaml</include>
                    <include>**/application*.properties</include>
                </includes>
            </resource>
            <resource>
                <directory>${basedir}/src/main/resources</directory>
                <excludes>
                    <exclude>**/application*.yml</exclude>
                    <exclude>**/application*.yaml</exclude>
                    <exclude>**/application*.properties</exclude>
                </excludes>
            </resource>
        </resources>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.jetbrains.kotlin</groupId>
                    <artifactId>kotlin-maven-plugin</artifactId>
                    <version>${kotlin.version}</version>
                    <executions>
                        <execution>
                            <id>compile</id>
                            <phase>compile</phase>
                            <goals>
                                <goal>compile</goal>
                            </goals>
                        </execution>
                        <execution>
                            <id>test-compile</id>
                            <phase>test-compile</phase>
                            <goals>
                                <goal>test-compile</goal>
                            </goals>
                        </execution>
                    </executions>
                    <configuration>
                        <jvmTarget>${java.version}</jvmTarget>
                        <javaParameters>true</javaParameters>
                    </configuration>
                </plugin>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <configuration>
                        <parameters>true</parameters>
                    </configuration>
                </plugin>
                <plugin>
                    <artifactId>maven-failsafe-plugin</artifactId>
                    <executions>
                        <execution>
                            <goals>
                                <goal>integration-test</goal>
                                <goal>verify</goal>
                            </goals>
                        </execution>
                    </executions>
                    <configuration>
                        <classesDirectory>${project.build.outputDirectory}</classesDirectory>
                    </configuration>
                </plugin>
                <plugin>
                    <artifactId>maven-jar-plugin</artifactId>
                    <configuration>
                        <archive>
                            <manifest>
                                <mainClass>${start-class}</mainClass>
                                <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                            </manifest>
                        </archive>
                    </configuration>
                </plugin>
                <plugin>
                    <artifactId>maven-war-plugin</artifactId>
                    <configuration>
                        <archive>
                            <manifest>
                                <mainClass>${start-class}</mainClass>
                                <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                            </manifest>
                        </archive>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.codehaus.mojo</groupId>
                    <artifactId>exec-maven-plugin</artifactId>
                    <configuration>
                        <mainClass>${start-class}</mainClass>
                    </configuration>
                </plugin>
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <configuration>
                        <delimiters>
                            <delimiter>${resource.delimiter}</delimiter>
                        </delimiters>
                        <useDefaultDelimiters>false</useDefaultDelimiters>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>pl.project13.maven</groupId>
                    <artifactId>git-commit-id-plugin</artifactId>
                    <executions>
                        <execution>
                            <goals>
                                <goal>revision</goal>
                            </goals>
                        </execution>
                    </executions>
                    <configuration>
                        <verbose>true</verbose>
                        <dateFormat>yyyy-MM-dd'T'HH:mm:ssZ</dateFormat>
                        <generateGitPropertiesFile>true</generateGitPropertiesFile>
                        <generateGitPropertiesFilename>${project.build.outputDirectory}/git.properties</generateGitPropertiesFilename>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <executions>
                        <execution>
                            <id>repackage</id>
                            <goals>
                                <goal>repackage</goal>
                            </goals>
                        </execution>
                    </executions>
                    <configuration>
                        <mainClass>${start-class}</mainClass>
                    </configuration>
                </plugin>
                <plugin>
                    <artifactId>maven-shade-plugin</artifactId>
                    <executions>
                        <execution>
                            <phase>package</phase>
                            <goals>
                                <goal>shade</goal>
                            </goals>
                            <configuration>
                                <transformers>
                                    <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                        <resource>META-INF/spring.handlers</resource>
                                    </transformer>
                                    <transformer implementation="org.springframework.boot.maven.PropertiesMergingResourceTransformer">
                                        <resource>META-INF/spring.factories</resource>
                                    </transformer>
                                    <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                        <resource>META-INF/spring.schemas</resource>
                                    </transformer>
                                    <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
                                    <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                        <mainClass>${start-class}</mainClass>
                                    </transformer>
                                </transformers>
                            </configuration>
                        </execution>
                    </executions>
                    <dependencies>
                        <dependency>
                            <groupId>org.springframework.boot</groupId>
                            <artifactId>spring-boot-maven-plugin</artifactId>
                            <version>2.1.0.RELEASE</version>
                        </dependency>
                    </dependencies>
                    <configuration>
                        <keepDependenciesWithProvidedScope>true</keepDependenciesWithProvidedScope>
                        <createDependencyReducedPom>true</createDependencyReducedPom>
                        <filters>
                            <filter>
                                <artifact>*:*</artifact>
                                <excludes>
                                    <exclude>META-INF/*.SF</exclude>
                                    <exclude>META-INF/*.DSA</exclude>
                                    <exclude>META-INF/*.RSA</exclude>
                                </excludes>
                            </filter>
                        </filters>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.eclipse.m2e</groupId>
                    <artifactId>lifecycle-mapping</artifactId>
                    <version>1.0.0</version>
                    <configuration>
                        <lifecycleMappingMetadata>
                            <pluginExecutions>
                                <pluginExecution>
                                    <pluginExecutionFilter>
                                        <groupId>org.codehaus.mojo</groupId>
                                        <artifactId>flatten-maven-plugin</artifactId>
                                        <versionRange>[1.0.0,)</versionRange>
                                        <goals>
                                            <goal>flatten</goal>
                                        </goals>
                                    </pluginExecutionFilter>
                                    <action>
                                        <ignore/>
                                    </action>
                                </pluginExecution>
                                <pluginExecution>
                                    <pluginExecutionFilter>
                                        <groupId>org.apache.maven.plugins</groupId>
                                        <artifactId>maven-checkstyle-plugin</artifactId>
                                        <versionRange>[3.0.0,)</versionRange>
                                        <goals>
                                            <goal>check</goal>
                                        </goals>
                                    </pluginExecutionFilter>
                                    <action>
                                        <ignore/>
                                    </action>
                                </pluginExecution>
                            </pluginExecutions>
                        </lifecycleMappingMetadata>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
</project>

可以看出这个工程又是依赖于spring-boot-dependencies，也就是我们第二种方式引入spring boot所需依赖。

二、直接引入spring-boot-dependencies的pom内容

            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

这种方式无需继承父模块，可以解决以上第一种单继承的问题。
scope=import，type=pom表示在此pom中引入spring-boot-dependencies的pom的所有内容，注意只能在dependencyManagement中使用。
下面看一下spring-boot-dependencies的内容。

<?xml version="1.0" encoding="utf-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-dependencies</artifactId>
    <version>2.1.0.RELEASE</version>
    <packaging>pom</packaging>
    <name>Spring Boot Dependencies</name>
    <description>Spring Boot Dependencies</description>
    <url>https://projects.spring.io/spring-boot/#</url>
    <licenses>
        <license>
            <name>Apache License, Version 2.0</name>
            <url>http://www.apache.org/licenses/LICENSE-2.0</url>
        </license>
    </licenses>
    <developers>
        <developer>
            <name>Pivotal</name>
            <email>info@pivotal.io</email>
            <organization>Pivotal Software, Inc.</organization>
            <organizationUrl>http://www.spring.io</organizationUrl>
        </developer>
    </developers>
    <scm>
        <url>https://github.com/spring-projects/spring-boot</url>
    </scm>
    <properties>
        <activemq.version>5.15.7</activemq.version>
        <antlr2.version>2.7.7</antlr2.version>
        <appengine-sdk.version>1.9.67</appengine-sdk.version>
        <artemis.version>2.6.3</artemis.version>
        <aspectj.version>1.9.2</aspectj.version>
        <assertj.version>3.11.1</assertj.version>
        <atomikos.version>4.0.6</atomikos.version>
        <bitronix.version>2.1.4</bitronix.version>
        <build-helper-maven-plugin.version>3.0.0</build-helper-maven-plugin.version>
        <byte-buddy.version>1.9.3</byte-buddy.version>
        <caffeine.version>2.6.2</caffeine.version>
        <cassandra-driver.version>3.6.0</cassandra-driver.version>
        <classmate.version>1.4.0</classmate.version>
        <commons-codec.version>1.11</commons-codec.version>
        <commons-dbcp2.version>2.5.0</commons-dbcp2.version>
        <commons-lang3.version>3.8.1</commons-lang3.version>
        <commons-pool.version>1.6</commons-pool.version>
        <commons-pool2.version>2.6.0</commons-pool2.version>
        <couchbase-cache-client.version>2.1.0</couchbase-cache-client.version>
        <couchbase-client.version>2.7.0</couchbase-client.version>
        <derby.version>10.14.2.0</derby.version>
        <dom4j.version>1.6.1</dom4j.version>
        <dropwizard-metrics.version>4.0.3</dropwizard-metrics.version>
        <ehcache.version>2.10.6</ehcache.version>
        <ehcache3.version>3.6.1</ehcache3.version>
        <elasticsearch.version>6.4.2</elasticsearch.version>
        <embedded-mongo.version>2.1.1</embedded-mongo.version>
        <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
        <flatten-maven-plugin.version>1.0.1</flatten-maven-plugin.version>
        <flyway.version>5.2.1</flyway.version>
        <freemarker.version>2.3.28</freemarker.version>
        <git-commit-id-plugin.version>2.2.5</git-commit-id-plugin.version>
        <glassfish-el.version>3.0.0</glassfish-el.version>
        <glassfish-jaxb.version>2.3.1</glassfish-jaxb.version>
        <groovy.version>2.5.3</groovy.version>
        <gson.version>2.8.5</gson.version>
        <h2.version>1.4.197</h2.version>
        <hamcrest.version>1.3</hamcrest.version>
        <hazelcast.version>3.11</hazelcast.version>
        <hazelcast-hibernate5.version>1.2.3</hazelcast-hibernate5.version>
        <hibernate.version>5.3.7.Final</hibernate.version>
        <hibernate-validator.version>6.0.13.Final</hibernate-validator.version>
        <hikaricp.version>3.2.0</hikaricp.version>
        <hsqldb.version>2.4.1</hsqldb.version>
        <htmlunit.version>2.33</htmlunit.version>
        <httpasyncclient.version>4.1.4</httpasyncclient.version>
        <httpclient.version>4.5.6</httpclient.version>
        <httpcore.version>4.4.10</httpcore.version>
        <infinispan.version>9.4.0.Final</infinispan.version>
        <influxdb-java.version>2.14</influxdb-java.version>
        <jackson.version>2.9.7</jackson.version>
        <janino.version>3.0.10</janino.version>
        <javax-activation.version>1.2.0</javax-activation.version>
        <javax-annotation.version>1.3.2</javax-annotation.version>
        <javax-cache.version>1.1.0</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>1.1.3</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>1.1.6</jaxen.version>
        <jaybird.version>3.0.5</jaybird.version>
        <jboss-logging.version>3.3.2.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>2.27</jersey.version>
        <jest.version>6.3.1</jest.version>
        <jetty.version>9.4.12.v20180830</jetty.version>
        <jetty-el.version>8.5.33</jetty-el.version>
        <jetty-jsp.version>2.2.0.v201112011158</jetty-jsp.version>
        <jetty-reactive-httpclient.version>1.0.1</jetty-reactive-httpclient.version>
        <jmustache.version>1.14</jmustache.version>
        <jna.version>4.5.2</jna.version>
        <joda-time.version>2.10.1</joda-time.version>
        <johnzon.version>${johnzon-jsonb.version}</johnzon.version>
        <johnzon-jsonb.version>1.1.10</johnzon-jsonb.version>
        <jolokia.version>1.6.0</jolokia.version>
        <jooq.version>3.11.5</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>5.3.1</junit-jupiter.version>
        <kafka.version>2.0.0</kafka.version>
        <kotlin.version>1.2.71</kotlin.version>
        <lettuce.version>5.1.2.RELEASE</lettuce.version>
        <liquibase.version>3.6.2</liquibase.version>
        <log4j2.version>2.11.1</log4j2.version>
        <logback.version>1.2.3</logback.version>
        <lombok.version>1.18.2</lombok.version>
        <mariadb.version>2.3.0</mariadb.version>
        <maven-antrun-plugin.version>1.8</maven-antrun-plugin.version>
        <maven-assembly-plugin.version>3.1.0</maven-assembly-plugin.version>
        <maven-clean-plugin.version>3.1.0</maven-clean-plugin.version>
        <maven-compiler-plugin.version>3.8.0</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>2.22.1</maven-failsafe-plugin.version>
        <maven-help-plugin.version>3.1.0</maven-help-plugin.version>
        <maven-install-plugin.version>2.5.2</maven-install-plugin.version>
        <maven-invoker-plugin.version>3.1.0</maven-invoker-plugin.version>
        <maven-jar-plugin.version>3.1.0</maven-jar-plugin.version>
        <maven-javadoc-plugin.version>3.0.1</maven-javadoc-plugin.version>
        <maven-resources-plugin.version>3.1.0</maven-resources-plugin.version>
        <maven-shade-plugin.version>3.2.0</maven-shade-plugin.version>
        <maven-site-plugin.version>3.7.1</maven-site-plugin.version>
        <maven-source-plugin.version>3.0.1</maven-source-plugin.version>
        <maven-surefire-plugin.version>2.22.1</maven-surefire-plugin.version>
        <maven-war-plugin.version>3.2.2</maven-war-plugin.version>
        <micrometer.version>1.1.0</micrometer.version>
        <mimepull.version>1.9.10</mimepull.version>
        <mockito.version>2.23.0</mockito.version>
        <mongodb.version>3.8.2</mongodb.version>
        <mongo-driver-reactivestreams.version>1.9.2</mongo-driver-reactivestreams.version>
        <mssql-jdbc.version>6.4.0.jre8</mssql-jdbc.version>
        <mysql.version>8.0.13</mysql.version>
        <nekohtml.version>1.9.22</nekohtml.version>
        <neo4j-ogm.version>3.1.4</neo4j-ogm.version>
        <netty.version>4.1.29.Final</netty.version>
        <netty-tcnative.version>2.0.17.Final</netty-tcnative.version>
        <nio-multipart-parser.version>1.1.0</nio-multipart-parser.version>
        <pooled-jms-version>1.0.3</pooled-jms-version>
        <postgresql.version>42.2.5</postgresql.version>
        <prometheus-pushgateway.version>0.5.0</prometheus-pushgateway.version>
        <quartz.version>2.3.0</quartz.version>
        <querydsl.version>4.2.1</querydsl.version>
        <rabbit-amqp-client.version>5.4.3</rabbit-amqp-client.version>
        <reactive-streams.version>1.0.2</reactive-streams.version>
        <reactor-bom.version>Californium-SR2</reactor-bom.version>
        <rest-assured.version>3.1.1</rest-assured.version>
        <rxjava.version>1.3.8</rxjava.version>
        <rxjava2.version>2.2.3</rxjava2.version>
        <rxjava-adapter.version>1.2.1</rxjava-adapter.version>
        <saaj-impl.version>1.5.0</saaj-impl.version>
        <selenium.version>3.14.0</selenium.version>
        <selenium-htmlunit.version>2.33.0</selenium-htmlunit.version>
        <sendgrid.version>4.3.0</sendgrid.version>
        <servlet-api.version>4.0.1</servlet-api.version>
        <slf4j.version>1.7.25</slf4j.version>
        <snakeyaml.version>1.23</snakeyaml.version>
        <solr.version>7.4.0</solr.version>
        <spring.version>5.1.2.RELEASE</spring.version>
        <spring-amqp.version>2.1.0.RELEASE</spring-amqp.version>
        <spring-batch.version>4.1.0.RELEASE</spring-batch.version>
        <spring-cloud-connectors.version>2.0.3.RELEASE</spring-cloud-connectors.version>
        <spring-data-releasetrain.version>Lovelace-SR2</spring-data-releasetrain.version>
        <spring-framework.version>${spring.version}</spring-framework.version>
        <spring-hateoas.version>0.25.0.RELEASE</spring-hateoas.version>
        <spring-integration.version>5.1.0.RELEASE</spring-integration.version>
        <spring-kafka.version>2.2.0.RELEASE</spring-kafka.version>
        <spring-ldap.version>2.3.2.RELEASE</spring-ldap.version>
        <spring-plugin.version>1.2.0.RELEASE</spring-plugin.version>
        <spring-restdocs.version>2.0.2.RELEASE</spring-restdocs.version>
        <spring-retry.version>1.2.2.RELEASE</spring-retry.version>
        <spring-security.version>5.1.1.RELEASE</spring-security.version>
        <spring-session-bom.version>Bean-RELEASE</spring-session-bom.version>
        <spring-ws.version>3.0.4.RELEASE</spring-ws.version>
        <sqlite-jdbc.version>3.25.2</sqlite-jdbc.version>
        <statsd-client.version>3.1.0</statsd-client.version>
        <sun-mail.version>${javax-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>3.0.1.RELEASE</thymeleaf-extras-java8time.version>
        <thymeleaf-extras-springsecurity.version>3.0.4.RELEASE</thymeleaf-extras-springsecurity.version>
        <thymeleaf-layout-dialect.version>2.3.0</thymeleaf-layout-dialect.version>
        <tomcat.version>9.0.12</tomcat.version>
        <unboundid-ldapsdk.version>4.0.8</unboundid-ldapsdk.version>
        <undertow.version>2.0.14.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>0.35</webjars-locator-core.version>
        <wsdl4j.version>1.6.3</wsdl4j.version>
        <xml-apis.version>1.4.01</xml-apis.version>
        <xml-maven-plugin.version>1.0.2</xml-maven-plugin.version>
        <xmlunit2.version>2.6.2</xmlunit2.version>
    </properties>
    <dependencyManagement>
        <dependencies>
            ......
        </dependencies>
    </dependencyManagement>
    <build>
        <pluginManagement>
        ......
        </pluginManagement>
    </build>
</project>

可以看出绝大多数我们可能用到的包依赖和插件依赖都已经在spring-boot-dependencies中定义好了，因此我们在使用的时候只需要把我们要用到的依赖引入就可以了，写起来非常的简洁。
另外，两种方式都只需要定义好父模块的版本即可，实际要引用到某个子模块的时候不需要在自己写版本号。