Spring Boot独立应用引入Core Module Jar依赖异常问题求助

开发者阿泽

2026-7-18

问题描述

将包含POJO、DAO、Service的core-module模块整合到Spring Boot独立应用时，生成可执行Jar包后出现UnsatisfiedDependencyException错误，且Jar包中不包含core-module的代码。该模块引入Spring Boot Web应用时运行正常，项目使用Java 8，core-module中的Service标注@Service、DAO标注@Repository。

独立应用模块pom.xml

<modelVersion>4.0.0</modelVersion>
<groupId>com.project.standalone</groupId>
<artifactId>StandaloneApp</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<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>
    <spring.boot.version>2.3.8.RELEASE</spring.boot.version>
    <failOnMissingWebXml>false</failOnMissingWebXml> 
</properties>

<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>
      
<dependencies> 
    <dependency>
        <groupId>com.project</groupId>
        <artifactId>core-module</artifactId>
        <version>1.0-SNAPSHOT</version>
        <type>jar</type>
    </dependency>
</dependencies> 
<build>
    <finalName>api</finalName>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>2.2.2.RELEASE</version>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>
</project>

core-module模块pom.xml

<modelVersion>4.0.0</modelVersion>
<groupId>com.project</groupId>
<artifactId>core-module</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<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>
    <spring.boot.version>2.3.8.RELEASE</spring.boot.version>
</properties>
<dependencies>      
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <version>${spring.boot.version}</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.28</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>5.2.4.Final</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <version>${spring.boot.version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>5.2.19.RELEASE</version>
        <type>jar</type>
    </dependency>
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-core-asl</artifactId>
        <version>1.9.13</version>
        <type>jar</type>
    </dependency>
    <!-- ..some more dependencies -->
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>2.2.2.RELEASE</version>
            <executions>
                <execution>
                    <id>repackage</id>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                    <configuration>
                        <classifier>exec</classifier>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>
</project>

独立应用代码

@SpringBootApplication
@EnableTransactionManagement
@EnableScheduling
@EnableJpaRepositories(basePackages = {"com.project.core"})
@EntityScan("com.fc.backend")
@ComponentScan(basePackages = {"com.project.core", "com.project.standalone"})
public class StandaloneApp{
    private final Logger LOGGER = LoggerFactory.getLogger(this.getClass()); 
           
    public static void main(String[] args) {
        System.setProperty("spring.config.location", System.getProperty("user.home") + "/properties/application.yml");
        SpringApplication.run(StandaloneApp.class, args);
        StandaloneApp testObj = new StandaloneApp();
        testObj.testRunMethod();
    }

    public void testRunMethod(){
        System.out.println(".........Method Starts........");
        
        UserService uService = new UserService();
        List<User> activeUser = uService.getAllActiveUsers();
            for (User user : activeUser) {
                if (StringUtils.isNotBlank(user.getWritePath()) && StringUtils.isNotBlank(user.getFtpPath())) {
                    System.out.println(".........name........"+distributor);
                }
            }
        System.out.println(".........Method Ends........");
    }
}

报错信息

2023-06-28 18:18:08.939  WARN 17692 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'markupTypeService': Unsatisfied dependency expressed through field 'dcpsService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'distributorClientProductSelectionService': Unsatisfied dependency expressed through field 'exchangeRateService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'exchangeRateService': Unsatisfied dependency expressed through field 'distributorDao'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'distributorDaoImpl': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [com.fc.backend.distributor.dao.impl.DistributorDaoImpl] from ClassLoader [org.springframework.boot.loader.LaunchedURLClassLoader@31cefde0]
2023-06-28 18:18:08.939  INFO 17692 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'

解决方案

1. 修复core-module的打包配置

core-module作为依赖模块，无需使用spring-boot-maven-plugin的repackage目标（该插件会将模块打包为可执行Jar，导致依赖无法被正确引入）。移除core-module pom.xml中的该插件配置：

<!-- 移除以下插件配置 -->
<!--
<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <version>2.2.2.RELEASE</version>
    <executions>
        <execution>
            <id>repackage</id>
            <goals>
                <goal>repackage</goal>
            </goals>
            <configuration>
                <classifier>exec</classifier>
            </configuration>
        </execution>
    </executions>
</plugin>
-->

2. 统一Spring Boot插件版本

独立应用模块中spring-boot-maven-plugin版本（2.2.2.RELEASE）与Spring Boot依赖版本（2.3.8.RELEASE）不一致，将插件版本改为${spring.boot.version}：

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

3. 修复代码中的依赖注入问题

testRunMethod中直接new UserService()会绕过Spring依赖注入，导致Service内部的DAO无法被注入。改为通过Spring容器获取Bean：

// 修改main方法，获取Spring上下文
public static void main(String[] args) {
    System.setProperty("spring.config.location", System.getProperty("user.home") + "/properties/application.yml");
    ConfigurableApplicationContext context = SpringApplication.run(StandaloneApp.class, args);
    StandaloneApp testObj = context.getBean(StandaloneApp.class);
    testObj.testRunMethod();
}

// 注入UserService
@Autowired
private UserService uService;

public void testRunMethod(){
    System.out.println(".........Method Starts........");
    
    List<User> activeUser = uService.getAllActiveUsers();
        for (User user : activeUser) {
            if (StringUtils.isNotBlank(user.getWritePath()) && StringUtils.isNotBlank(user.getFtpPath())) {
                System.out.println(".........name........"+user.getName()); // 修复原代码未定义的distributor变量
            }
        }
    System.out.println(".........Method Ends........");
}

4. 检查包扫描范围

确保@EntityScan包含所有实体类所在的包，若实体类存在于com.project.core下，补充包路径：

@EntityScan(basePackages = {"com.fc.backend", "com.project.core"})

内容的提问来源于stack exchange，提问作者Charmi Chavda

Spring Boot独立应用引入Core Module Jar依赖异常问题求助

问题描述 #

独立应用模块pom.xml #

core-module模块pom.xml #

独立应用代码 #

报错信息 #

解决方案 #

1. 修复core-module的打包配置 #

2. 统一Spring Boot插件版本 #

3. 修复代码中的依赖注入问题 #

4. 检查包扫描范围 #