1. Problem description
I used Ruoyi's framework here, and his framework is multi-module. For example, I created a new module C. In the C module, I introduced other jars and local jars, according to the separation and packaging method in his document :
<?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>${
project.build.directory}/resources</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<!-- 打jar包时忽略配置文件 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<excludes>
<exclude>**/*.yml</exclude>
<exclude>**/*.xml</exclude>
</excludes>
</configuration>
</plugin>
<!-- spring boot repackage -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<layout>ZIP</layout>
<includes>
<include>
<groupId>non-exists</groupId>
<artifactId>non-exists</artifactId>
</include>
</includes>
</configuration>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
The dependencies are copied through the maven-dependency-plugin plug-in, and the jar package imported locally in the C module is in the packaged lib directory, and there is no life or death.
Two, the solution
I searched around the Internet, but did not find a solution. In fact, the main problem lies in the maven-dependency-plugin plug-in. In the C module, the dependency range and dependency transitivity of the locally imported JAR package are system:
<dependency>
<groupId>taobao</groupId>
<artifactId>taobao</artifactId>
<version>1.0</version>
<scope>system</scope>
<systemPath>${
pom.basedir}/lib/taobao-sdk.jar</systemPath>
</dependency>
In the maven-dependency-plugin above, it is set to runtime
Therefore, when packaging, only the runtime scope will be packaged, and the system will not be packaged, so this problem will occur. I found the method in the official document :
The first sentence explains the scope threshold to be included. An empty string means that all dependencies are included (default), and the includeScope configuration can be deleted.