SpringBoot多模块项目打包问题

项目结构图如下：　

　　　

在SpringBoot多模块项目打包时遇见如下错误：

1、repackage failed: Unable to find main class -> [Help 1]

解决步骤：

　　（1）删除父pom中的build标签

　　（2）在web模块的pom中配置，指定启动类，其他模块中不需要配置：

　　<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.dh.yjt.SpringBootDemo.SpringBootDemoApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>

2、[ERROR] /xxx.java:[16,39] 程序包com.xx..xxx不存在

　　解决办法：删除其他模块中的build标签

3、springboot打包与配置文件外置

　　https://blog.csdn.net/pei19890521/article/details/80984707

　　最终pom及package文件如下：

<?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>SpringBootDemo</artifactId>
        <groupId>com.dh.yjt</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>mySystem-web</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>mySystem-web Maven Webapp</name>
    <url>http://127.0.0.1/com.dh.yjt.SpringBootDemo.domain.index</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.dh.yjt</groupId>
            <artifactId>mySystem-config</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>com.dh.yjt</groupId>
            <artifactId>mySystem-dao</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>com.dh.yjt</groupId>
            <artifactId>mySystem-common</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>com.dh.yjt</groupId>
            <artifactId>mySystem-service</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>com.dh.yjt</groupId>
            <artifactId>mySystem-domain</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>

        <!-- xml配置 -->
        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-xml</artifactId>
        </dependency>
        <dependency>
            <groupId>com.jd.jmq</groupId>
            <artifactId>jmq-model</artifactId>
            <version>2.1.4</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <mainClass>com.dh.yjt.SpringBootDemo.SpringBootDemoApplication</mainClass>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <configuration>
                    <descriptors>
                        <descriptor>src/main/resources/package.xml</descriptor>
                    </descriptors>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

package.xml:

<?xml version="1.0" encoding="UTF-8"?>
<assembly
        xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.3"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.3 http://maven.apache.org/xsd/assembly-1.1.3.xsd">
    <id>package</id>
    <formats>
        <format>tar.gz</format>
    </formats>
    <includeBaseDirectory>true</includeBaseDirectory>
    <fileSets>
        <fileSet>
            <directory>${project.basedir}</directory>
            <outputDirectory>/</outputDirectory>
            <includes>
                <include>*.sql</include>
                <include>*.bat</include>
                <include>*.md</include>
            </includes>
        </fileSet>
        <fileSet>
            <directory>${project.basedir}/src/main/resources/bin</directory>
            <outputDirectory>../</outputDirectory>
            <includes>
                <include>bin/*.sh</include>
                <include>*.sh</include>
            </includes>
        </fileSet>
        <fileSet>
            <directory>${project.basedir}/src/main/resources</directory>
            <outputDirectory>/conf</outputDirectory>
            <includes>
                <include>config/*.xml</include>
                <include>config/*.properties</include>
                <include>*.properties</include>
            </includes>
        </fileSet>
        <fileSet>
            <directory>${project.build.directory}</directory>
            <outputDirectory>/</outputDirectory>
            <includes>
                <include>*.jar</include>
            </includes>
        </fileSet>
    </fileSets>
</assembly>