maven里面pom文件的各标签介绍

由于maven在工作中经常使用，但是平时要记的知识点有点多，偶尔回头来看一些东西难免忘记，特此整理一篇笔记，方便大家搜索查询，也方便自己以后查询！

后续碰见其他的标签也会进行更新！

maven的pom文件中存在引入依赖、声明、继承；引入依赖的时候首先去本地仓库找，找不到再去配置的其他仓库找！

1.modelVersion

 <modelVersion>4.0.0</modelVersion><!--描述这个POM文件是遵从哪个版本的项目描述符。-->

2.parent

  <parent><!--父级依赖，继承-->

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

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

        <version>2.0.2.RELEASE</version>

        <relativePath/> <!-- lookup parent from repository -->

    </parent>

3.dependencies

 <dependencies><!--引入依赖-->

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>

        </dependency>

    </dependencies>

4.dependencyManagement

 <!--声明依赖，如果dependencies中没有声明版本就会来这里面找-->

    <dependencyManagement>

        <dependencies>

            <dependency>

                <groupId>org.springframework.cloud</groupId>

                <artifactId>spring-cloud-dependencies</artifactId>

                <version>Finchley.BUILD-SNAPSHOT</version>

                <type>pom</type>

                <scope>import</scope>

            </dependency>

        </dependencies>

    </dependencyManagement>

5.repositories

<!--   &lt;!&ndash;相当于配置远程仓库&ndash;&gt;

    <repositories>

        <repository>

            <id>spring-snapshots</id>

            <name>Spring Snapshots</name>

            <url>https://repo.spring.io/libs-snapshot</url>

            &lt;!&ndash;是否自动更新&ndash;&gt;

            <snapshots>

                <enabled>true</enabled>

            </snapshots>

        </repository>

        <repository>

            <id>spring-milestones</id>

            <name>Spring Milestones</name>

            <url>https://repo.spring.io/libs-milestone</url>

            <snapshots>

                <enabled>false</enabled>

            </snapshots>

        </repository>

        <repository>

            <id>spring-releases</id>

            <name>Spring Releases</name>

            <url>https://repo.spring.io/libs-release</url>

            <snapshots>

                <enabled>false</enabled>

            </snapshots>

        </repository>

    </repositories>

6.properties

 <properties><!--定义的标签属性可以在其他地方读取-->

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <start-class>eureka.EurekaApplication</start-class>

        <java.version>1.8</java.version>

        <docker.image.prefix2></docker.image.prefix2>

    </properties>

7.pluginRepositories

  &lt;!&ndash;插件仓库&ndash;&gt;

    <pluginRepositories>

        <pluginRepository>

            <id>spring-snapshots</id>

            <name>Spring Snapshots</name>

            <url>https://repo.spring.io/libs-snapshot-local</url>

            <snapshots>

                <enabled>true</enabled>

            </snapshots>

        </pluginRepository>

        <pluginRepository>

            <id>spring-milestones</id>

            <name>Spring Milestones</name>

            <url>https://repo.spring.io/libs-milestone-local</url>

            <snapshots>

                <enabled>false</enabled>

            </snapshots>

        </pluginRepository>

    </pluginRepositories>-->

8.配置jdk版本

   <build>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <configuration>

                    <source>1.8</source>

                    <target>1.8</target>

                </configuration>

            </plugin>

        </plugins>

   </build>