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
1 <dependency> 2 <groupId>cn.soboys</groupId> 项目组项目所在团队 3 <artifactId>kmall</artifactId> 项目具体名称模块名 4 <version>1.0-SNAPSHOT</version> 项目版本号 5 </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
1 <!--引用springBoot父项目--> 2 <parent> 3 <groupId>org.springframework.boot</groupId> 4 <artifactId>spring-boot-starter-parent</artifactId> 5 <version>2.4.7</version> 6 <relativePath/> <!-- lookup parent from repository --> 7 </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
1<parent> 2 <groupId>org.springframework.boot</groupId> 3 <artifactId>spring-boot-dependencies</artifactId> 4 <version>2.4.7</version> 5 </parent>
1<properties> 2 <activemq.version>5.16.2</activemq.version> 3 <antlr2.version>2.7.7</antlr2.version> 4 <appengine-sdk.version>1.9.89</appengine-sdk.version> 5 <artemis.version>2.15.0</artemis.version> 6 <aspectj.version>1.9.6</aspectj.version> 7 <assertj.version>3.18.1</assertj.version> 8 <atomikos.version>4.0.6</atomikos.version> 9 <awaitility.version>4.0.3</awaitility.version> 10 <bitronix.version>2.1.4</bitronix.version> 11 <build-helper-maven-plugin.version>3.2.0</build-helper-maven-plugin.version> 12 <byte-buddy.version>1.10.22</byte-buddy.version> 13 <caffeine.version>2.8.8</caffeine.version> 14 <cassandra-driver.version>4.9.0</cassandra-driver.version> 15 <classmate.version>1.5.1</classmate.version> 16 <commons-codec.version>1.15</commons-codec.version> 17 <commons-dbcp2.version>2.8.0</commons-dbcp2.version> 18 <commons-lang3.version>3.11</commons-lang3.version> 19 <commons-pool.version>1.6</commons-pool.version> 20 <commons-pool2.version>2.9.0</commons-pool2.version> 21 <couchbase-client.version>3.0.10</couchbase-client.version> 22 <db2-jdbc.version>11.5.5.0</db2-jdbc.version> 23 <dependency-management-plugin.version>1.0.11.RELEASE</dependency-management-plugin.version> 24 <derby.version>10.14.2.0</derby.version> 25 <dropwizard-metrics.version>4.1.22</dropwizard-metrics.version> 26 <ehcache.version>2.10.9.2</ehcache.version> 27 <ehcache3.version>3.9.4</ehcache3.version> 28 <elasticsearch.version>7.9.3</elasticsearch.version> 29 <embedded-mongo.version>2.2.0</embedded-mongo.version> 30 <flyway.version>7.1.1</flyway.version> 31 <freemarker.version>2.3.31</freemarker.version> 32 <git-commit-id-plugin.version>3.0.1</git-commit-id-plugin.version> 33 <glassfish-el.version>3.0.3</glassfish-el.version> 34 <glassfish-jaxb.version>2.3.4</glassfish-jaxb.version> 35 <groovy.version>2.5.14</groovy.version> 36 <gson.version>2.8.7</gson.version> 37 <h2.version>1.4.200</h2.version> 38 <hamcrest.version>2.2</hamcrest.version> 39 <hazelcast.version>4.0.3</hazelcast.version> 40 <hazelcast-hibernate5.version>2.1.1</hazelcast-hibernate5.version> 41 <hibernate.version>5.4.32.Final</hibernate.version> 42 <hibernate-validator.version>6.1.7.Final</hibernate-validator.version> 43 <hikaricp.version>3.4.5</hikaricp.version> 44 <hsqldb.version>2.5.2</hsqldb.version> 45 <htmlunit.version>2.44.0</htmlunit.version> 46 <httpasyncclient.version>4.1.4</httpasyncclient.version> 47 <httpclient.version>4.5.13</httpclient.version> 48 <httpcore.version>4.4.14</httpcore.version> 49 <infinispan.version>11.0.11.Final</infinispan.version> 50 <influxdb-java.version>2.20</influxdb-java.version> 51 <jackson-bom.version>2.11.4</jackson-bom.version> 52 <jakarta-activation.version>1.2.2</jakarta-activation.version> 53 <jakarta-annotation.version>1.3.5</jakarta-annotation.version> 54 <jakarta-jms.version>2.0.3</jakarta-jms.version> 55 <jakarta-json.version>1.1.6</jakarta-json.version> 56 <jakarta-json-bind.version>1.0.2</jakarta-json-bind.version> 57 <jakarta-mail.version>1.6.7</jakarta-mail.version> 58 <jakarta-persistence.version>2.2.3</jakarta-persistence.version> 59 <jakarta-servlet.version>4.0.4</jakarta-servlet.version> 60 <jakarta-servlet-jsp-jstl.version>1.2.7</jakarta-servlet-jsp-jstl.version> 61 <jakarta-transaction.version>1.3.3</jakarta-transaction.version> 62 <jakarta-validation.version>2.0.2</jakarta-validation.version> 63 <jakarta-websocket.version>1.1.2</jakarta-websocket.version> 64 <jakarta-ws-rs.version>2.1.6</jakarta-ws-rs.version> 65 <jakarta-xml-bind.version>2.3.3</jakarta-xml-bind.version> 66 <jakarta-xml-soap.version>1.4.2</jakarta-xml-soap.version> 67 <jakarta-xml-ws.version>2.3.3</jakarta-xml-ws.version> 68 <janino.version>3.1.4</janino.version> 69 <javax-activation.version>1.2.0</javax-activation.version> 70 <javax-annotation.version>1.3.2</javax-annotation.version> 71 <javax-cache.version>1.1.1</javax-cache.version> 72 <javax-jaxb.version>2.3.1</javax-jaxb.version> 73 <javax-jaxws.version>2.3.1</javax-jaxws.version> 74 <javax-jms.version>2.0.1</javax-jms.version> 75 <javax-json.version>1.1.4</javax-json.version> 76 <javax-jsonb.version>1.0</javax-jsonb.version> 77 <javax-mail.version>1.6.2</javax-mail.version> 78 <javax-money.version>1.1</javax-money.version> 79 <javax-persistence.version>2.2</javax-persistence.version> 80 <javax-transaction.version>1.3</javax-transaction.version> 81 <javax-validation.version>2.0.1.Final</javax-validation.version> 82 <javax-websocket.version>1.1</javax-websocket.version> 83 <jaxen.version>1.2.0</jaxen.version> 84 <jaybird.version>3.0.11</jaybird.version> 85 <jboss-logging.version>3.4.2.Final</jboss-logging.version> 86 <jboss-transaction-spi.version>7.6.1.Final</jboss-transaction-spi.version> 87 <jdom2.version>2.0.6</jdom2.version> 88 <jedis.version>3.3.0</jedis.version> 89 <jersey.version>2.32</jersey.version> 90 <jetty-el.version>8.5.54</jetty-el.version> 91 <jetty-jsp.version>2.2.0.v201112011158</jetty-jsp.version> 92 <jetty-reactive-httpclient.version>1.1.9</jetty-reactive-httpclient.version> 93 <jetty.version>9.4.42.v20210604</jetty.version> 94 <jmustache.version>1.15</jmustache.version> 95 <johnzon.version>1.2.13</johnzon.version> 96 <jolokia.version>1.6.2</jolokia.version> 97 <jooq.version>3.14.11</jooq.version> 98 <json-path.version>2.4.0</json-path.version> 99 <json-smart.version>2.3.1</json-smart.version> 100 <jsonassert.version>1.5.0</jsonassert.version> 101 <jstl.version>1.2</jstl.version> 102 <jtds.version>1.3.1</jtds.version> 103 <junit.version>4.13.2</junit.version> 104 <junit-jupiter.version>5.7.2</junit-jupiter.version> 105 <kafka.version>2.6.2</kafka.version> 106 <kotlin.version>1.4.32</kotlin.version> 107 <kotlin-coroutines.version>1.4.3</kotlin-coroutines.version> 108 <lettuce.version>6.0.5.RELEASE</lettuce.version> 109 <liquibase.version>3.10.3</liquibase.version> 110 <log4j2.version>2.13.3</log4j2.version> 111 <logback.version>1.2.3</logback.version> 112 <lombok.version>1.18.20</lombok.version> 113 <mariadb.version>2.7.3</mariadb.version> 114 <maven-antrun-plugin.version>1.8</maven-antrun-plugin.version> 115 <maven-assembly-plugin.version>3.3.0</maven-assembly-plugin.version> 116 <maven-clean-plugin.version>3.1.0</maven-clean-plugin.version> 117 <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version> 118 <maven-dependency-plugin.version>3.1.2</maven-dependency-plugin.version> 119 <maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version> 120 <maven-enforcer-plugin.version>3.0.0-M3</maven-enforcer-plugin.version> 121 <maven-failsafe-plugin.version>2.22.2</maven-failsafe-plugin.version> 122 <maven-help-plugin.version>3.2.0</maven-help-plugin.version> 123 <maven-install-plugin.version>2.5.2</maven-install-plugin.version> 124 <maven-invoker-plugin.version>3.2.2</maven-invoker-plugin.version> 125 <maven-jar-plugin.version>3.2.0</maven-jar-plugin.version> 126 <maven-javadoc-plugin.version>3.2.0</maven-javadoc-plugin.version> 127 <maven-resources-plugin.version>3.2.0</maven-resources-plugin.version> 128 <maven-shade-plugin.version>3.2.4</maven-shade-plugin.version> 129 <maven-source-plugin.version>3.2.1</maven-source-plugin.version> 130 <maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version> 131 <maven-war-plugin.version>3.3.1</maven-war-plugin.version> 132 <micrometer.version>1.6.7</micrometer.version> 133 <mimepull.version>1.9.14</mimepull.version> 134 <mockito.version>3.6.28</mockito.version> 135 <mongodb.version>4.1.2</mongodb.version> 136 <mssql-jdbc.version>8.4.1.jre8</mssql-jdbc.version> 137 <mysql.version>8.0.25</mysql.version> 138 <nekohtml.version>1.9.22</nekohtml.version> 139 <neo4j-java-driver.version>4.1.3</neo4j-java-driver.version> 140 <netty.version>4.1.65.Final</netty.version> 141 <netty-tcnative.version>2.0.39.Final</netty-tcnative.version> 142 <oauth2-oidc-sdk.version>8.36.1</oauth2-oidc-sdk.version> 143 <nimbus-jose-jwt.version>8.20.2</nimbus-jose-jwt.version> 144 <ojdbc.version>19.3.0.0</ojdbc.version> 145 <okhttp3.version>3.14.9</okhttp3.version> 146 <oracle-database.version>19.8.0.0</oracle-database.version> 147 <pooled-jms.version>1.2.2</pooled-jms.version> 148 <postgresql.version>42.2.20</postgresql.version> 149 <prometheus-pushgateway.version>0.9.0</prometheus-pushgateway.version> 150 <quartz.version>2.3.2</quartz.version> 151 <querydsl.version>4.4.0</querydsl.version> 152 <r2dbc-bom.version>Arabba-SR10</r2dbc-bom.version> 153 <rabbit-amqp-client.version>5.10.0</rabbit-amqp-client.version> 154 <reactive-streams.version>1.0.3</reactive-streams.version> 155 <reactor-bom.version>2020.0.7</reactor-bom.version> 156 <rest-assured.version>3.3.0</rest-assured.version> 157 <rsocket.version>1.1.1</rsocket.version> 158 <rxjava.version>1.3.8</rxjava.version> 159 <rxjava-adapter.version>1.2.1</rxjava-adapter.version> 160 <rxjava2.version>2.2.21</rxjava2.version> 161 <saaj-impl.version>1.5.3</saaj-impl.version> 162 <selenium.version>3.141.59</selenium.version> 163 <selenium-htmlunit.version>2.44.0</selenium-htmlunit.version> 164 <sendgrid.version>4.6.8</sendgrid.version> 165 <servlet-api.version>4.0.1</servlet-api.version> 166 <slf4j.version>1.7.30</slf4j.version> 167 <snakeyaml.version>1.27</snakeyaml.version> 168 <solr.version>8.5.2</solr.version> 169 <spring-amqp.version>2.3.8</spring-amqp.version> 170 <spring-batch.version>4.3.3</spring-batch.version> 171 <spring-data-bom.version>2020.0.9</spring-data-bom.version> 172 <spring-framework.version>5.3.8</spring-framework.version> 173 <spring-hateoas.version>1.2.6</spring-hateoas.version> 174 <spring-integration.version>5.4.7</spring-integration.version> 175 <spring-kafka.version>2.6.9</spring-kafka.version> 176 <spring-ldap.version>2.3.4.RELEASE</spring-ldap.version> 177 <spring-restdocs.version>2.0.5.RELEASE</spring-restdocs.version> 178 <spring-retry.version>1.3.1</spring-retry.version> 179 <spring-security.version>5.4.6</spring-security.version> 180 <spring-session-bom.version>2020.0.4</spring-session-bom.version> 181 <spring-ws.version>3.0.10.RELEASE</spring-ws.version> 182 <sqlite-jdbc.version>3.32.3.3</sqlite-jdbc.version> 183 <sun-mail.version>1.6.7</sun-mail.version> 184 <thymeleaf.version>3.0.12.RELEASE</thymeleaf.version> 185 <thymeleaf-extras-data-attribute.version>2.0.1</thymeleaf-extras-data-attribute.version> 186 <thymeleaf-extras-java8time.version>3.0.4.RELEASE</thymeleaf-extras-java8time.version> 187 <thymeleaf-extras-springsecurity.version>3.0.4.RELEASE</thymeleaf-extras-springsecurity.version> 188 <thymeleaf-layout-dialect.version>2.5.3</thymeleaf-layout-dialect.version> 189 <tomcat.version>9.0.46</tomcat.version> 190 <unboundid-ldapsdk.version>4.0.14</unboundid-ldapsdk.version> 191 <undertow.version>2.2.8.Final</undertow.version> 192 <versions-maven-plugin.version>2.8.1</versions-maven-plugin.version> 193 <webjars-hal-browser.version>3325375</webjars-hal-browser.version> 194 <webjars-locator-core.version>0.46</webjars-locator-core.version> 195 <wsdl4j.version>1.6.3</wsdl4j.version> 196 <xml-maven-plugin.version>1.0.2</xml-maven-plugin.version> 197 <xmlunit2.version>2.7.0</xmlunit2.version> 198 </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<dependencyManagement>，
在springboot项目中父模块就定义了
1 <dependencyManagement> 2 <dependencies> 3 4 <dependency> 5 <groupId>org.springframework.boot</groupId> 6 <artifactId>spring-boot-starter</artifactId> 7 <version>2.4.7</version> 8 </dependency> 9 <dependency> 10 <groupId>org.springframework.boot</groupId> 11 <artifactId>spring-boot-starter-activemq</artifactId> 12 <version>2.4.7</version> 13 </dependency> 14 <dependency> 15 <groupId>org.springframework.boot</groupId> 16 <artifactId>spring-boot-starter-actuator</artifactId> 17 <version>2.4.7</version> 18 </dependency> 19 <dependency> 20 <groupId>org.springframework.boot</groupId> 21 <artifactId>spring-boot-starter-amqp</artifactId> 22 <version>2.4.7</version> 23 </dependency> 24 <dependency> 25 <groupId>org.springframework.boot</groupId> 26 <artifactId>spring-boot-starter-aop</artifactId> 27 <version>2.4.7</version> 28 </dependency> 29 <dependency> 30 <groupId>org.springframework.boot</groupId> 31 <artifactId>spring-boot-starter-artemis</artifactId> 32 <version>2.4.7</version> 33 </dependency> 34 <dependency> 35 <groupId>org.springframework.boot</groupId> 36 <artifactId>spring-boot-starter-batch</artifactId> 37 <version>2.4.7</version> 38 </dependency> 39 <dependency> 40 <groupId>org.springframework.boot</groupId> 41 <artifactId>spring-boot-starter-cache</artifactId> 42 <version>2.4.7</version> 43 </dependency> 44 <dependency> 45 <groupId>org.springframework.boot</groupId> 46 <artifactId>spring-boot-starter-data-cassandra</artifactId> 47 <version>2.4.7</version> 48 </dependency> 49 <dependency> 50 <groupId>org.springframework.boot</groupId> 51 <artifactId>spring-boot-starter-data-cassandra-reactive</artifactId> 52 <version>2.4.7</version> 53 </dependency> 54 <dependency> 55 <groupId>org.springframework.boot</groupId> 56 <artifactId>spring-boot-starter-data-couchbase</artifactId> 57 <version>2.4.7</version> 58 </dependency> 59 <dependency> 60 <groupId>org.springframework.boot</groupId> 61 <artifactId>spring-boot-starter-data-couchbase-reactive</artifactId> 62 <version>2.4.7</version> 63 </dependency> 64 <dependency> 65 <groupId>org.springframework.boot</groupId> 66 <artifactId>spring-boot-starter-data-elasticsearch</artifactId> 67 <version>2.4.7</version> 68 </dependency> 69 <dependency> 70 <groupId>org.springframework.boot</groupId> 71 <artifactId>spring-boot-starter-data-jdbc</artifactId> 72 <version>2.4.7</version> 73 </dependency> 74 <dependency> 75 <groupId>org.springframework.boot</groupId> 76 <artifactId>spring-boot-starter-data-jpa</artifactId> 77 <version>2.4.7</version> 78 </dependency> 79 <dependency> 80 <groupId>org.springframework.boot</groupId> 81 <artifactId>spring-boot-starter-data-ldap</artifactId> 82 <version>2.4.7</version> 83 </dependency> 84 <dependency> 85 <groupId>org.springframework.boot</groupId> 86 <artifactId>spring-boot-starter-data-mongodb</artifactId> 87 <version>2.4.7</version> 88 </dependency> 89 <dependency> 90 <groupId>org.springframework.boot</groupId> 91 <artifactId>spring-boot-starter-data-mongodb-reactive</artifactId> 92 <version>2.4.7</version> 93 </dependency> 94 <dependency> 95 <groupId>org.springframework.boot</groupId> 96 <artifactId>spring-boot-starter-data-r2dbc</artifactId> 97 <version>2.4.7</version> 98 </dependency> 99 <dependency> 100 <groupId>org.springframework.boot</groupId> 101 <artifactId>spring-boot-starter-data-redis</artifactId> 102 <version>2.4.7</version> 103 </dependency> 104 <dependency> 105 <groupId>org.springframework.boot</groupId> 106 <artifactId>spring-boot-starter-data-redis-reactive</artifactId> 107 <version>2.4.7</version> 108 </dependency> 109 <dependency> 110 <groupId>org.springframework.boot</groupId> 111 <artifactId>spring-boot-starter-data-neo4j</artifactId> 112 <version>2.4.7</version> 113 </dependency> 114 <dependency> 115 <groupId>org.springframework.boot</groupId> 116 <artifactId>spring-boot-starter-data-rest</artifactId> 117 <version>2.4.7</version> 118 </dependency> 119 <dependency> 120 <groupId>org.springframework.boot</groupId> 121 <artifactId>spring-boot-starter-data-solr</artifactId> 122 <version>2.4.7</version> 123 </dependency> 124 <dependency> 125 <groupId>org.springframework.boot</groupId> 126 <artifactId>spring-boot-starter-freemarker</artifactId> 127 <version>2.4.7</version> 128 </dependency> 129 <dependency> 130 <groupId>org.springframework.boot</groupId> 131 <artifactId>spring-boot-starter-groovy-templates</artifactId> 132 <version>2.4.7</version> 133 </dependency> 134 <dependency> 135 <groupId>org.springframework.boot</groupId> 136 <artifactId>spring-boot-starter-hateoas</artifactId> 137 <version>2.4.7</version> 138 </dependency> 139 <dependency> 140 <groupId>org.springframework.boot</groupId> 141 <artifactId>spring-boot-starter-integration</artifactId> 142 <version>2.4.7</version> 143 </dependency> 144 <dependency> 145 <groupId>org.springframework.boot</groupId> 146 <artifactId>spring-boot-starter-jdbc</artifactId> 147 <version>2.4.7</version> 148 </dependency> 149 <dependency> 150 <groupId>org.springframework.boot</groupId> 151 <artifactId>spring-boot-starter-jersey</artifactId> 152 <version>2.4.7</version> 153 </dependency> 154 <dependency> 155 <groupId>org.springframework.boot</groupId> 156 <artifactId>spring-boot-starter-jetty</artifactId> 157 <version>2.4.7</version> 158 </dependency> 159 <dependency> 160 <groupId>org.springframework.boot</groupId> 161 <artifactId>spring-boot-starter-jooq</artifactId> 162 <version>2.4.7</version> 163 </dependency> 164 <dependency> 165 <groupId>org.springframework.boot</groupId> 166 <artifactId>spring-boot-starter-json</artifactId> 167 <version>2.4.7</version> 168 </dependency> 169 <dependency> 170 <groupId>org.springframework.boot</groupId> 171 <artifactId>spring-boot-starter-jta-atomikos</artifactId> 172 <version>2.4.7</version> 173 </dependency> 174 <dependency> 175 <groupId>org.springframework.boot</groupId> 176 <artifactId>spring-boot-starter-jta-bitronix</artifactId> 177 <version>2.4.7</version> 178 </dependency> 179 <dependency> 180 <groupId>org.springframework.boot</groupId> 181 <artifactId>spring-boot-starter-log4j2</artifactId> 182 <version>2.4.7</version> 183 </dependency> 184 <dependency> 185 <groupId>org.springframework.boot</groupId> 186 <artifactId>spring-boot-starter-logging</artifactId> 187 <version>2.4.7</version> 188 </dependency> 189 <dependency> 190 <groupId>org.springframework.boot</groupId> 191 <artifactId>spring-boot-starter-mail</artifactId> 192 <version>2.4.7</version> 193 </dependency> 194 <dependency> 195 <groupId>org.springframework.boot</groupId> 196 <artifactId>spring-boot-starter-mustache</artifactId> 197 <version>2.4.7</version> 198 </dependency> 199 <dependency> 200 <groupId>org.springframework.boot</groupId> 201 <artifactId>spring-boot-starter-oauth2-client</artifactId> 202 <version>2.4.7</version> 203 </dependency> 204 <dependency> 205 <groupId>org.springframework.boot</groupId> 206 <artifactId>spring-boot-starter-oauth2-resource-server</artifactId> 207 <version>2.4.7</version> 208 </dependency> 209 <dependency> 210 <groupId>org.springframework.boot</groupId> 211 <artifactId>spring-boot-starter-quartz</artifactId> 212 <version>2.4.7</version> 213 </dependency> 214 <dependency> 215 <groupId>org.springframework.boot</groupId> 216 <artifactId>spring-boot-starter-reactor-netty</artifactId> 217 <version>2.4.7</version> 218 </dependency> 219 <dependency> 220 <groupId>org.springframework.boot</groupId> 221 <artifactId>spring-boot-starter-rsocket</artifactId> 222 <version>2.4.7</version> 223 </dependency> 224 <dependency> 225 <groupId>org.springframework.boot</groupId> 226 <artifactId>spring-boot-starter-security</artifactId> 227 <version>2.4.7</version> 228 </dependency> 229 <dependency> 230 <groupId>org.springframework.boot</groupId> 231 <artifactId>spring-boot-starter-test</artifactId> 232 <version>2.4.7</version> 233 </dependency> 234 <dependency> 235 <groupId>org.springframework.boot</groupId> 236 <artifactId>spring-boot-starter-thymeleaf</artifactId> 237 <version>2.4.7</version> 238 </dependency> 239 <dependency> 240 <groupId>org.springframework.boot</groupId> 241 <artifactId>spring-boot-starter-tomcat</artifactId> 242 <version>2.4.7</version> 243 </dependency> 244 <dependency> 245 <groupId>org.springframework.boot</groupId> 246 <artifactId>spring-boot-starter-undertow</artifactId> 247 <version>2.4.7</version> 248 </dependency> 249 <dependency> 250 <groupId>org.springframework.boot</groupId> 251 <artifactId>spring-boot-starter-validation</artifactId> 252 <version>2.4.7</version> 253 </dependency> 254 <dependency> 255 <groupId>org.springframework.boot</groupId> 256 <artifactId>spring-boot-starter-web</artifactId> 257 <version>2.4.7</version> 258 </dependency> 259 <dependency> 260 <groupId>org.springframework.boot</groupId> 261 <artifactId>spring-boot-starter-webflux</artifactId> 262 <version>2.4.7</version> 263 </dependency> 264 <dependency> 265 <groupId>org.springframework.boot</groupId> 266 <artifactId>spring-boot-starter-websocket</artifactId> 267 <version>2.4.7</version> 268 </dependency> 269 <dependency> 270 <groupId>org.springframework.boot</groupId> 271 <artifactId>spring-boot-starter-web-services</artifactId> 272 <version>2.4.7</version> 273 </dependency> 274 </dependencies> 275</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
1 <dependency> 2 <groupId>org.springframework.boot</groupId> 3 <artifactId>spring-boot-starter-aop</artifactId> 4 </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
1 <dependencies> 2 <!--aop 切面--> 3 <dependency> 4 <groupId>org.springframework.boot</groupId> 5 <artifactId>spring-boot-starter-aop</artifactId> 6 </dependency> 7 <!--ip获取位置--> 8 </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
1<dependency> 2 <groupId>org.springframework.boot</groupId> 3 <artifactId>spring-boot-starter-web</artifactId> 4 <exclusions> 5 <exclusion> 6 <groupId>org.springframework.boot</groupId> 7 <artifactId>spring-boot-starter-logging</artifactId> 8 </exclusion> 9 <exclusion> 10 <groupId>org.springframework.boot</groupId> 11 <artifactId>spring-boot-starter-tomcat</artifactId> 12 </exclusion> 13 </exclusions> 14 </dependency>
maven打包和插件
下面列举的常用打包和插件
1 <!--打包--> 2 <build> 3 <resources> 4 <resource> 5 <filtering>true</filtering> 6 <directory>src/main/resources</directory> 7 </resource> 8 </resources> 9 10 11 <plugins> 12 <plugin> 13 <groupId>org.apache.maven.plugins</groupId> 14 <artifactId>maven-compiler-plugin</artifactId> 15 <version>${maven.compiler.plugin.version}</version> 16 <configuration> 17 <source>${java.version}</source> 18 <target>${java.version}</target> 19 <encoding>${project.build.sourceEncoding}</encoding> 20 </configuration> 21 </plugin> 22 23 <plugin> 24 <groupId>org.apache.maven.plugins</groupId> 25 <artifactId>maven-resources-plugin</artifactId> 26 <version>${maven.resources.plugin.version}</version> 27 <configuration> 28 <encoding>${project.build.sourceEncoding}</encoding> 29 </configuration> 30 </plugin> 31 32 <plugin> 33 <groupId>org.apache.maven.plugins</groupId> 34 <artifactId>maven-jar-plugin</artifactId> 35 <version>${maven.jar.plugin.version}</version> 36 </plugin> 37 38 <!-- <plugin> 39 <artifactId>maven-war-plugin</artifactId> 40 <version>${maven-war-plugin.version}</version> 41 <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 –> 42 <packagingExcludes> 43 WEB-INF/lib/hutool-setting.jar, 44 </packagingExcludes> 45 </configuration> 46 </plugin>--> 47 48 <plugin> 49 <groupId>org.springframework.boot</groupId> 50 <artifactId>spring-boot-maven-plugin</artifactId> 51 <executions> 52 <execution> 53 <goals> 54 <goal>repackage</goal><!--可以把依赖的包都打包到生成的Jar包中--> 55 </goals> 56 </execution> 57 </executions> 58 </plugin> 59 </plugins> 60 </build>