Maven打包分离jar包和资源文件如何将模块中的本地jar包也打包进来

一、问题描述

我这里用到了若依的框架，他这个框架是多模块的，比如我新建了一个模块C，在C模块里，引入了其他的jar以及本地的jar，按他文档里的分离打包方式：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>ruoyi</artifactId>
        <groupId>com.ruoyi</groupId>
        <version>4.4.0</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
	<packaging>jar</packaging>
    <artifactId>ruoyi-admin</artifactId>
	
	<description>
	    web服务入口
	</description>

    <dependencies>
    
        <!-- SpringBoot集成thymeleaf模板 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <!-- spring-boot-devtools -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<optional>true</optional> <!-- 表示依赖不会传递 -->
		</dependency>

		<!-- swagger2-->
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger2</artifactId>
		</dependency>
		
		<!--防止进入swagger页面报类型转换错误，排除2.9.2中的引用，手动增加1.5.21版本-->
        <dependency>
            <groupId>io.swagger</groupId>
            <artifactId>swagger-annotations</artifactId>
            <version>1.5.21</version>
        </dependency>
        
        <dependency>
            <groupId>io.swagger</groupId>
            <artifactId>swagger-models</artifactId>
            <version>1.5.21</version>
        </dependency>
		
		<!-- swagger2-UI-->
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger-ui</artifactId>
		</dependency>
		 
    	 <!-- Mysql驱动包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

		<!-- 核心模块-->
        <dependency>
            <groupId>com.ruoyi</groupId>
            <artifactId>ruoyi-framework</artifactId>
        </dependency>
        
        <!-- 定时任务-->
        <dependency>
            <groupId>com.ruoyi</groupId>
            <artifactId>ruoyi-quartz</artifactId>
        </dependency>
        
        <!-- 代码生成-->
        <dependency>
            <groupId>com.ruoyi</groupId>
            <artifactId>ruoyi-generator</artifactId>
        </dependency>
        
    </dependencies>

     <build>
        <!-- jar包名 -->
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <!-- 分离lib -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <executions>
                    <execution>
                        <id>copy-dependencies</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <!-- 依赖包输出目录，将来不打进jar包里 -->
                            <outputDirectory>${project.build.directory}/lib</outputDirectory>
                            <excludeTransitive>false</excludeTransitive>
                            <stripVersion>false</stripVersion>
                            <includeScope>runtime</includeScope>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <!-- copy资源文件 -->
            <plugin>
                <artifactId>maven-resources-plugin</artifactId>
                <executions>
                    <execution>
                        <id>copy-resources</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-resources</goal>
                        </goals>
                        <configuration>
                            <resources>
                                <resource>
                                    <directory>src/main/resources</directory>
                                </resource>
                            </resources>
                            <outputDirectory>${project.build.directory}/resources</outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <!-- 打jar包时忽略配置文件 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>**/*.yml
                        **/*.xml</exclude>
                    </excludes>
                </configuration>
            </plugin>
            <!-- spring boot repackage -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <layout>ZIP</layout>
                    <includes>
                        <include>
                            <groupId>non-exists</groupId>
                            <artifactId>non-exists</artifactId>
                        </include>
                    </includes>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
	
</project>

通过maven-dependency-plugin插件复制依赖，C模块里本地引入的jar包，在打包完的lib目录，死活没有。

二、解决方法

在网上找了一圈，并没有找到解决方法，其实主要问题就在于maven-dependency-plugin插件，在C模块里，本地引入的JAR包依赖范围和依赖的传递性是system：

    <dependency>
      <groupId>taobao</groupId>
      <artifactId>taobao</artifactId>
      <version>1.0</version>
      <scope>system</scope>
      <systemPath>${pom.basedir}/lib/taobao-sdk.jar</systemPath>
    </dependency>

而在上面的maven-dependency-plugin中，设置了为runtime

所以导致打包的时候，只会打包runtime作用域的，不会打包system，所以就会出现这个问题，在官方文档里找到了方法：

第一句话就说明了，要包括的范围阈值，空字符串表示包含所有依赖项（默认），删除includeScope配置即可。