打包为带依赖的 JAR

<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
</properties>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>3.1.1</version>
            <configuration>
                <archive>
                    <manifest>
                        <mainClass>com.seliote.demo.Demo</mainClass>
                    </manifest>
                </archive>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
            </configuration>
            <executions>
                <execution>
                    <id>make-assembly</id>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

打包为 WAR

<properties>
    <!-- 指示源文件编码 -->
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.targer>1.8</maven.compiler.targer>
</properties>
<!-- 指示 maven 打包为 war 文件而非 jar -->
<packaging>war</packaging>
<!-- build中所有的路径都是以src文件夹为根 -->
<build>
    <!-- java 源文件根目录 -->
    <sourceDirectory>src/main/java</sourceDirectory>
    <resources>
        <resource>
            <!-- 资源根目录 -->
            <directory>src/main/resources</directory>
        </resource>
    </resources>
    <!-- 单元测试 java 代码根目录 -->
    <testSourceDirectory>src/test/java</testSourceDirectory>
    <testResources>
        <testResource>
            <!-- 单元测试资源根目录 -->
            <directory>src/test/resources</directory>
        </testResource>
    </testResources>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.3</version>
            <configuration>
                <!-- web 根目录（包含 WEB-INF 的） -->
                <warSourceDirectory>web</warSourceDirectory>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
</build>