spring boot 项目 maven 打包问题请教

没有扫描到呗。启动类里加上 exam-file 的包名。

另外<module>exam-file</module>放在<module>exam-web</module>前面

在 idea 里运行的时候，观察一下运行的 java 命令。你会发现
java -classpath 里跟了一堆.jar 包

胖 jar
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>3.6.0</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/outputs</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>

parent :

<?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">
<modelVersion>4.0.0</modelVersion>

<groupId>com.lddq</groupId>
<artifactId>exam-parent</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>

<properties>
<java.version>17</java.version>
<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring-boot.version>3.1.0</spring-boot.version>
</properties>

<modules>
<module>exam-common</module>
<module>exam-web</module>
<module>exam-file</module>
</modules>

<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>

<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>3.3.1</version>
</plugin>

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.11.0</version>
<configuration>
<showWarnings>true</showWarnings>
<showDeprecation>true</showDeprecation>
<annotationProcessorPaths>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.26</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>

<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot.version}</version>
<executions>
<execution>
<id>repackage</id>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>

<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
</plugin>

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>


common:

<?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">
<modelVersion>4.0.0</modelVersion>

<parent>
<groupId>com.lddq</groupId>
<artifactId>exam-parent</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>

<packaging>jar</packaging>
<artifactId>exam-common</artifactId>

</project>

file:

<?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">
<modelVersion>4.0.0</modelVersion>

<parent>
<groupId>com.lddq</groupId>
<artifactId>exam-parent</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>

<packaging>jar</packaging>
<artifactId>exam-file</artifactId>

<dependencies>
<dependency>
<groupId>com.lddq</groupId>
<artifactId>exam-common</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>

</project>

web:

<?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">
<modelVersion>4.0.0</modelVersion>

<parent>
<groupId>com.lddq</groupId>
<artifactId>exam-parent</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>

<packaging>jar</packaging>
<artifactId>exam-web</artifactId>

<dependencies>
<dependency>
<groupId>com.lddq</groupId>
<artifactId>exam-common</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>

<dependency>
<groupId>com.lddq</groupId>
<artifactId>exam-file</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>

----
java -jar exam-web-0.0.1-SNAPSHOT.jar
2023-10-13T21:16:58.496+08:00 INFO 18832 --- [ main] com.lddq.exam.start.ExamApplication : Started ExamApplication in 2.102 seconds (process running for 2.557)
2023-10-13T21:16:58.500+08:00 INFO 18832 --- [ main] com.lddq.exam.start.ExamApplication : hi file!

spring-boot 的 maven plugin 从 parent 里面删掉

spring-boot-maven-plugin 是普通 Spring 应用打包所有依赖到同一个包的插件。
你在 Root 的 POM 里面定义了 build 里面用了它，意味着所有子模块都会继承这个插件。

正确做法是：在 Root 里移除 spring-boot-maven-plugin ，放到 Web 项目里面就好，其他的模块你不用来发布出去给其他人用的话，只定义一个 maven-compiler-plugin ，能够编译出来就可以了。。。

@chocotan #6
@diagnostics #7

感谢，成功搞定😄