依赖管理

使用坐标导入jar包

1.在pom.xml中编写<dependencise>标签

2.在<dependencies>标签中，使用<dependency>引入坐标

3.定义坐标的groupId，artifactId，version

4.点击刷新按钮，是坐标生效

  <!--导入mysql 驱动jar包-->
    <dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.25</version>
        </dependency>
    </dependencies>

导入各类jar包。（alt+insert）

  <!--导入mysql 驱动jar包-->
    <dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.25</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.12</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
            <scope>test</scope>
        </dependency>


    </dependencies>