DevOps
9494
前言
我们在做java项目的时候由于jar包太多，我们就需要使用maven做项目管理，管理项目的jar包依赖，包括打包上线
maven基础
Maven 是一个项目管理工具，主要用于项目构建，依赖管理，项目信息管理
每个maven 项目根目录都会有一个 pom.xml文件， 负责项目构建，依赖管理
在这个文件里面，你只需要添加相应的jar包坐标配置，maven就会自动帮你下载相应jar包，不需要我们手动去构建添加jar包很方面，尤其在项目很大，需要jar包依赖很多时候，根本离不开maven
在maven的代码库中，每一个jar包也有自己的 pom.xml文件配置，只要你配置的jar包所依赖的其他jar包都会被maven自动下载下来。
这里会涉及到问题maven多模块实现以及循环依赖 后面会讲解
<dependency> <groupId>cn.soboys</groupId> 项目组项目所在团队 <artifactId>kmall</artifactId> 项目具体名称模块名 <version>1.0-SNAPSHOT</version> 项目版本号 </dependency>
maven都会通过，<groupId>-<artifactId>-<version>坐标来定位一个jar包
在maven互联网仓库上，并进行下载
Maven 会根据 POM 文件自动下载所需 JAR 包。如果以后你在本地其它项目中也使用此 JAR 包，那么 Maven 会首先检查本地是否有 JAR 包，如果没有再从中央仓库下载。
maven 项目结构命令
- src/main/java - 存放项目.java文件；
- src/main/resources - 存放项目资源文件；
- src/test/java - 存放测试类.java文件；
- src/test/resources - 存放测试资源文件；
- target - 项目输出目录；
- pom.xml - Maven核心文件（Project Object Model）；
maven常用命令
- mvn archetype：create 创建Maven项目
- mvn compile 编译源代码
- mvn deploy 发布项目
- mvn test-compile 编译测试源代码
- mvn test 运行应用程序中的单元测试
- mvn site 生成项目相关信息的网站
- mvn clean 清除项目目录中的生成结果
- mvn package 根据项目生成的jar
- mvn install 在本地Repository中安装jar
- mvn eclipse:eclipse 生成eclipse项目文件
- mvnjetty:run 启动jetty服务
- mvntomcat:run 启动tomcat服务
- mvn clean package -Dmaven.test.skip=true 清除以前的包后重新打包，跳过测试类
maven 常用标签
parent标签
在maven多模块项目中引用父pom依赖，在springboot项目中就有父依赖
<!--引用springBoot父项目--> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.4.7</version> <relativePath/> <!-- lookup parent from repository --> </parent>
properties标签
定义一些全局属性值，常用于jar包版本定义全局管理jar包版本后面可以${} 取值
在springboot项目中父pom会定义一些项目jar包版本依赖 ，所以我们在引用jar时候才不用写jar包版本，会自动跟随父pom中定义的jar包版本
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>2.4.7</version> </parent>
<properties> <activemq.version>5.16.2</activemq.version> <antlr2.version>2.7.7</antlr2.version> <appengine-sdk.version>1.9.89</appengine-sdk.version> <artemis.version>2.15.0</artemis.version> <aspectj.version>1.9.6</aspectj.version> <assertj.version>3.18.1</assertj.version> <atomikos.version>4.0.6</atomikos.version> <awaitility.version>4.0.3</awaitility.version> <bitronix.version>2.1.4</bitronix.version> <build-helper-maven-plugin.version>3.2.0</build-helper-maven-plugin.version> <byte-buddy.version>1.10.22</byte-buddy.version> <caffeine.version>2.8.8</caffeine.version> <cassandra-driver.version>4.9.0</cassandra-driver.version> <classmate.version>1.5.1</classmate.version> <commons-codec.version>1.15</commons-codec.version> <commons-dbcp2.version>2.8.0</commons-dbcp2.version> <commons-lang3.version>3.11</commons-lang3.version> <commons-pool.version>1.6</commons-pool.version> <commons-pool2.version>2.9.0</commons-pool2.version> <couchbase-client.version>3.0.10</couchbase-client.version> <db2-jdbc.version>11.5.5.0</db2-jdbc.version> <dependency-management-plugin.version>1.0.11.RELEASE</dependency-management-plugin.version> <derby.version>10.14.2.0</derby.version> <dropwizard-metrics.version>4.1.22</dropwizard-metrics.version> <ehcache.version>2.10.9.2</ehcache.version> <ehcache3.version>3.9.4</ehcache3.version> <elasticsearch.version>7.9.3</elasticsearch.version> <embedded-mongo.version>2.2.0</embedded-mongo.version> <flyway.version>7.1.1</flyway.version> <freemarker.version>2.3.31</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>2.3.4</glassfish-jaxb.version> <groovy.version>2.5.14</groovy.version> <gson.version>2.8.7</gson.version> <h2.version>1.4.200</h2.version> <hamcrest.version>2.2</hamcrest.version> <hazelcast.version>4.0.3</hazelcast.version> <hazelcast-hibernate5.version>2.1.1</hazelcast-hibernate5.version> <hibernate.version>5.4.32.Final</hibernate.version> <hibernate-validator.version>6.1.7.Final</hibernate-validator.version> <hikaricp.version>3.4.5</hikaricp.version> <hsqldb.version>2.5.2</hsqldb.version> <htmlunit.version>2.44.0</htmlunit.version> <httpasyncclient.version>4.1.4</httpasyncclient.version> <httpclient.version>4.5.13</httpclient.version> <httpcore.version>4.4.14</httpcore.version> <infinispan.version>11.0.11.Final</infinispan.version> <influxdb-java.version>2.20</influxdb-java.version> <jackson-bom.version>2.11.4</jackson-bom.version> <jakarta-activation.version>1.2.2</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>1.6.7</jakarta-mail.version> <jakarta-persistence.version>2.2.3</jakarta-persistence.version> <jakarta-servlet.version>4.0.4</jakarta-servlet.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>2.0.2</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>2.3.3</jakarta-xml-bind.version> <jakarta-xml-soap.version>1.4.2</jakarta-xml-soap.version> <jakarta-xml-ws.version>2.3.3</jakarta-xml-ws.version> <janino.version>3.1.4</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>1.1</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>3.0.11</jaybird.version> <jboss-logging.version>3.4.2.Final</jboss-logging.version> <jboss-transaction-spi.version>7.6.1.Final</jboss-transaction-spi.version> <jdom2.version>2.0.6</jdom2.version> <jedis.version>3.3.0</jedis.version> <jersey.version>2.32</jersey.version> <jetty-el.version>8.5.54</jetty-el.version> <jetty-jsp.version>2.2.0.v201112011158</jetty-jsp.version> <jetty-reactive-httpclient.version>1.1.9</jetty-reactive-httpclient.version> <jetty.version>9.4.42.v20210604</jetty.version> <jmustache.version>1.15</jmustache.version> <johnzon.version>1.2.13</johnzon.version> <jolokia.version>1.6.2</jolokia.version> <jooq.version>3.14.11</jooq.version> <json-path.version>2.4.0</json-path.version> <json-smart.version>2.3.1</json-smart.version> <jsonassert.version>1.5.0</jsonassert.version> <jstl.version>1.2</jstl.version> <jtds.version>1.3.1</jtds.version> <junit.version>4.13.2</junit.version> <junit-jupiter.version>5.7.2</junit-jupiter.version> <kafka.version>2.6.2</kafka.version> <kotlin.version>1.4.32</kotlin.version> <kotlin-coroutines.version>1.4.3</kotlin-coroutines.version> <lettuce.version>6.0.5.RELEASE</lettuce.version> <liquibase.version>3.10.3</liquibase.version> <log4j2.version>2.13.3</log4j2.version> <logback.version>1.2.3</logback.version> <lombok.version>1.18.20</lombok.version> <mariadb.version>2.7.3</mariadb.version> <maven-antrun-plugin.version>1.8</maven-antrun-plugin.version> <maven-assembly-plugin.version>3.3.0</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>3.1.2</maven-dependency-plugin.version> <maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version> <maven-enforcer-plugin.version>3.0.0-M3</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>3.2.2</maven-invoker-plugin.version> <maven-jar-plugin.version>3.2.0</maven-jar-plugin.version> <maven-javadoc-plugin.version>3.2.0</maven-javadoc-plugin.version> <maven-resources-plugin.version>3.2.0</maven-resources-plugin.version> <maven-shade-plugin.version>3.2.4</maven-shade-plugin.version> <maven-source-plugin.version>3.2.1</maven-source-plugin.version> <maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version> <maven-war-plugin.version>3.3.1</maven-war-plugin.version> <micrometer.version>1.6.7</micrometer.version> <mimepull.version>1.9.14</mimepull.version> <mockito.version>3.6.28</mockito.version> <mongodb.version>4.1.2</mongodb.version> <mssql-jdbc.version>8.4.1.jre8</mssql-jdbc.version> <mysql.version>8.0.25</mysql.version> <nekohtml.version>1.9.22</nekohtml.version> <neo4j-java-driver.version>4.1.3</neo4j-java-driver.version> <netty.version>4.1.65.Final</netty.version> <netty-tcnative.version>2.0.39.Final</netty-tcnative.version> <oauth2-oidc-sdk.version>8.36.1</oauth2-oidc-sdk.version> <nimbus-jose-jwt.version>8.20.2</nimbus-jose-jwt.version> <ojdbc.version>19.3.0.0</ojdbc.version> <okhttp3.version>3.14.9</okhttp3.version> <oracle-database.version>19.8.0.0</oracle-database.version> <pooled-jms.version>1.2.2</pooled-jms.version> <postgresql.version>42.2.20</postgresql.version> <prometheus-pushgateway.version>0.9.0</prometheus-pushgateway.version> <quartz.version>2.3.2</quartz.version> <querydsl.version>4.4.0</querydsl.version> <r2dbc-bom.version>Arabba-SR10</r2dbc-bom.version> <rabbit-amqp-client.version>5.10.0</rabbit-amqp-client.version> <reactive-streams.version>1.0.3</reactive-streams.version> <reactor-bom.version>2020.0.7</reactor-bom.version> <rest-assured.version>3.3.0</rest-assured.version> <rsocket.version>1.1.1</rsocket.version> <rxjava.version>1.3.8</rxjava.version> <rxjava-adapter.version>1.2.1</rxjava-adapter.version> <rxjava2.version>2.2.21</rxjava2.version> <saaj-impl.version>1.5.3</saaj-impl.version> <selenium.version>3.141.59</selenium.version> <selenium-htmlunit.version>2.44.0</selenium-htmlunit.version> <sendgrid.version>4.6.8</sendgrid.version> <servlet-api.version>4.0.1</servlet-api.version> <slf4j.version>1.7.30</slf4j.version> <snakeyaml.version>1.27</snakeyaml.version> <solr.version>8.5.2</solr.version> <spring-amqp.version>2.3.8</spring-amqp.version> <spring-batch.version>4.3.3</spring-batch.version> <spring-data-bom.version>2020.0.9</spring-data-bom.version> <spring-framework.version>5.3.8</spring-framework.version> <spring-hateoas.version>1.2.6</spring-hateoas.version> <spring-integration.version>5.4.7</spring-integration.version> <spring-kafka.version>2.6.9</spring-kafka.version> <spring-ldap.version>2.3.4.RELEASE</spring-ldap.version> <spring-restdocs.version>2.0.5.RELEASE</spring-restdocs.version> <spring-retry.version>1.3.1</spring-retry.version> <spring-security.version>5.4.6</spring-security.version> <spring-session-bom.version>2020.0.4</spring-session-bom.version> <spring-ws.version>3.0.10.RELEASE</spring-ws.version> <sqlite-jdbc.version>3.32.3.3</sqlite-jdbc.version> <sun-mail.version>1.6.7</sun-mail.version> <thymeleaf.version>3.0.12.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>2.5.3</thymeleaf-layout-dialect.version> <tomcat.version>9.0.46</tomcat.version> <unboundid-ldapsdk.version>4.0.14</unboundid-ldapsdk.version> <undertow.version>2.2.8.Final</undertow.version> <versions-maven-plugin.version>2.8.1</versions-maven-plugin.version> <webjars-hal-browser.version>3325375</webjars-hal-browser.version> <webjars-locator-core.version>0.46</webjars-locator-core.version> <wsdl4j.version>1.6.3</wsdl4j.version> <xml-maven-plugin.version>1.0.2</xml-maven-plugin.version> <xmlunit2.version>2.7.0</xmlunit2.version> </properties>
dependencyManagement标签
在Maven多模块的时候，管理依赖关系是非常重要的，各种依赖包冲突，查询问题起来非常复杂，于是就用到了
在springboot项目中父模块就定义了
<dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-activemq</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-amqp</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-artemis</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-batch</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-cache</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-cassandra</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-cassandra-reactive</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-couchbase</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-couchbase-reactive</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-elasticsearch</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jdbc</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-ldap</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb-reactive</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-r2dbc</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis-reactive</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-neo4j</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-rest</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-solr</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-freemarker</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-groovy-templates</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-hateoas</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-integration</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jersey</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jetty</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jooq</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-json</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jta-atomikos</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jta-bitronix</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-log4j2</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-logging</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mustache</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-oauth2-client</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-oauth2-resource-server</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-quartz</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-reactor-netty</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-rsocket</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-undertow</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-validation</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-webflux</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-websocket</artifactId> <version>2.4.7</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web-services</artifactId> <version>2.4.7</version> </dependency> </dependencies> </dependencyManagement>
那么在子模块中只需要<groupId>和<artifactId>即可，也就是我们创建springboot项目中
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency>
使用dependencyManagement可以统一管理项目的版本号，确保应用的各个项目的依赖和版本一致，不用每个模块项目都弄一个版本号，不利于管理，当需要变更版本号的时候只需要在父类容器里更新，不需要任何一个子项目的修改；如果某个子项目需要另外一个特殊的版本号时，只需要在自己的模块dependencies中声明一个版本号即可。子类就会使用子类声明的版本号，不继承于父类版本号
dependencies标签
用于引入项目依赖
<dependencies> <!--aop 切面--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency> <!--ip获取位置--> </dependencies>
注意
Dependencies相对于dependencyManagement，所有生命在dependencies里的依赖都会自动引入，并默认被所有的子项目继承。 而dependencyManagement里只是声明依赖，并不自动实现引入，因此子项目需要显示的声明需要用的依赖。
如果不在子项目中声明依赖，是不会从父项目中继承下来的；只有在子项目中写了该依赖项，并且没有指定具体版本，才会从父项目中继承该项，并且version和scope都读取自父pom;另外如果子项目中指定了版本号，那么会使用子项目中指定的jar版本。
maven冲突解决
我们可以通过exclusions 标签过滤掉不需要的依赖
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-logging</artifactId> </exclusion> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> </exclusion> </exclusions> </dependency>
maven打包和插件
下面列举的常用打包和插件
<!--打包--> <build> <resources> <resource> <filtering>true</filtering> <directory>src/main/resources</directory> </resource> </resources> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>${maven.compiler.plugin.version}</version> <configuration> <source>${java.version}</source> <target>${java.version}</target> <encoding>${project.build.sourceEncoding}</encoding> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-resources-plugin</artifactId> <version>${maven.resources.plugin.version}</version> <configuration> <encoding>${project.build.sourceEncoding}</encoding> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jar-plugin</artifactId> <version>${maven.jar.plugin.version}</version> </plugin> <!-- <plugin> <artifactId>maven-war-plugin</artifactId> <version>${maven-war-plugin.version}</version> <configuration> <!– Exclude JCL and LOG4J since all logging should go through SLF4J. Note that we're excluding log4j-<version>.jar but keeping log4j-over-slf4j-<version>.jar –> <packagingExcludes> WEB-INF/lib/hutool-setting.jar, </packagingExcludes> </configuration> </plugin>--> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <executions> <execution> <goals> <goal>repackage</goal><!--可以把依赖的包都打包到生成的Jar包中--> </goals> </execution> </executions> </plugin> </plugins> </build>