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社区首页 >问答首页 >BeanCreationException:在另一个maven spring项目中，自动处理的依赖项失败

问BeanCreationException:在另一个maven spring项目中，自动处理的依赖项失败
EN

Stack Overflow用户
提问于 2016-07-08 08:41:43
回答 2查看 6.5K关注 0票数 2

我有一些问题，与自动头发与第二个春季启动项目。希望你能给我一些提示来解决这个问题。

项目设置：项目数据中心管理数据存储访问。项目数据集成做了一些其他工作，但需要项目数据中心与数据存储进行组合。这两个项目都基于spring引导，并作为maven项目实现。

问题:当我尝试启动数据集成项目(运行Application.java)时，数据中心项目是通过maven依赖项集成的，我在线程末尾得到异常。项目数据中心作为独立的演示应用程序工作。它还与一个spring引导web应用程序(通过pom.xml作为依赖项集成)一起工作(通过HTTP请求读取数据存储实体)。

有什么主意吗？？最令人沮丧的一点是，当项目数据集成作为web应用程序实现时，相同的设置正在工作。但是，当数据集成作为本机java应用程序(jar)实现时，它无法工作。

数据中心(com.example.mcp.datahub):

Application.java

代码语言：javascript
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package com.example.mcp.datahub;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import com.example.mcp.datahub.model.WorkingDay;
import com.example.mcp.datahub.service.WorkingDayService;

@SpringBootApplication
@EnableTransactionManagement 
@ComponentScan("com.example.mcp")
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

WorkingDayRepository.java

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package com.example.mcp.datahub.repositories;

import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;

import com.example.mcp.datahub.model.WorkingDay;

@Repository
public interface WorkingDayRepository extends CrudRepository<WorkingDay, Long> {

}

WorkingDayService.java

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package com.example.mcp.datahub.service;

import java.util.Iterator;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.example.mcp.datahub.model.WorkingDay;
import com.example.mcp.datahub.repositories.WorkingDayRepository;

@Service
@ComponentScan("com.example.mcp")
public class WorkingDayService {

    @Autowired
    public WorkingDayRepository workingDayRepository;

    @Transactional(readOnly=true)
    public List<WorkingDay> getWorkingDays() {
        List<WorkingDay> list = (List<WorkingDay>) workingDayRepository.findAll();
        return list;
    }
}

pom.xml

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<?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.example.mcp.datahub</groupId>
    <artifactId>com.example.mcp.datahub</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>com.example.mcp.datahub</name>
    <description>Data Hub</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.7</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.0</version>
        </dependency>

    </dependencies>

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


</project>

(com.example.mcp.dataintegration):数据集成

Application.java

代码语言：javascript
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package com.example.mcp.dataintegration;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.scheduling.annotation.EnableScheduling;


@SpringBootApplication
@EnableScheduling
@ComponentScan("com.example.mcp")
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

ScheduledTasks.java

代码语言：javascript
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package com.example.mcp.dataintegration;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import com.example.mcp.datahub.model.WorkingDay;
import com.example.mcp.datahub.service.WorkingDayService;

@Service
@ComponentScan("com.example.mcp")
public class ScheduledTasks {

    @Autowired 
    public WorkingDayService workingDayService;

    @Scheduled(fixedDelay = 5000)
    public void reportCurrentTime() {
        //do something with workingDayService
    }

}

pom.xml

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<?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.example.mcp.dataintegration</groupId>
    <artifactId>com.example.mcp.dataintegration</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>com.example.mcp.dataintegration</name>
    <description>Data Integration Layer</description>

     <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository  -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.7</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.example.mcp.datahub</groupId>
            <artifactId>com.example.mcp.datahub</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>

    </dependencies>

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

异常

代码语言：javascript
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org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scheduledTasks': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: public com.example.mcp.datahub.service.WorkingDayService com.example.mcp.dataintegration.ScheduledTasks.workingDayService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'workingDayService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: public com.example.mcp.datahub.repositories.WorkingDayRepository com.example.mcp.datahub.service.WorkingDayService.workingDayRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.example.mcp.datahub.repositories.WorkingDayRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ...
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]
    at com.example.mcp.dataintegration.Application.main(Application.java:15) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: public com.example.mcp.datahub.service.WorkingDayService com.example.mcp.dataintegration.ScheduledTasks.workingDayService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'workingDayService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: public com.example.mcp.datahub.repositories.WorkingDayRepository com.example.mcp.datahub.service.WorkingDayService.workingDayRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.example.mcp.datahub.repositories.WorkingDayRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:573) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 16 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'workingDayService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: public com.example.mcp.datahub.repositories.WorkingDayRepository com.example.mcp.datahub.service.WorkingDayService.workingDayRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.example.mcp.datahub.repositories.WorkingDayRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
...
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 18 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: public com.example.mcp.datahub.repositories.WorkingDayRepository com.example.mcp.datahub.service.WorkingDayService.workingDayRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.example.mcp.datahub.repositories.WorkingDayRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:573) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 29 common frames omitted
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.example.mcp.datahub.repositories.WorkingDayRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1373) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ...
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 31 common frames omitted
spring
maven
jar
autowired
java
EN

回答 2

Stack Overflow用户

回答已采纳

发布于 2016-07-13 11:45:06

我已经解决了这个问题。下面的文章非常有用：Spring Boot And Multi-Module Maven Projects

我将文件com.example.mcp.dataintegration.Application.java移到了com.example.mcp.Application.java。但更不清楚为什么我的ComponentScan和JPARepo定义被忽略了.

票数 2
EN

Stack Overflow用户

发布于 2016-07-09 01:25:46

您在运行的应用程序类中尝试过@EnableJpaRepositories和@Configuration吗？

我在我的一个项目中尝试过这样的东西，它和你的一样，而且对我有用；

代码语言：javascript
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@Configuration
@EnableJpaRepositories("com.example.mcp")
@EntityScan("com.example.mcp")

WorkingDay有@Entity注释。

票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/38262393

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