试着运行我的Sping Boot 应用程序,我的编译器说;“找不到com.example.hello_world.UserService中的字段存储库所需的名为”entityManagerFactory“的Bean。
注射点具有以下注解:- @org.springframework.beans.工厂.注解.自动连线(必需=true)”
我是spring Boot 的新手,所以我不太确定为什么我的项目不能运行。我尝试了不同的注解,甚至使用“basePackages={“com.example.hello_world”}“,并在我的xml文件中添加不同的依赖项,但似乎没有任何效果。不太确定哪个文件是我的配置文件。M我的编译器
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.4.RELEASE)
2020-02-08 13:30:58.527 INFO 904 --- [ main] c.e.hello_world.HelloWorld1Application : Starting HelloWorld1Application on LAPTOP-QBE4L7C0 with PID 904 (C:\Users\Tristan\eclipse-workspace\hello_world-1\target\classes started by Tristan in C:\Users\Tristan\eclipse-workspace\hello_world-1)
2020-02-08 13:30:58.530 INFO 904 --- [ main] c.e.hello_world.HelloWorld1Application : No active profile set, falling back to default profiles: default
2020-02-08 13:30:58.914 INFO 904 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2020-02-08 13:30:58.962 INFO 904 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 39ms. Found 1 JPA repository interfaces.
2020-02-08 13:30:59.390 INFO 904 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-02-08 13:30:59.397 INFO 904 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-02-08 13:30:59.397 INFO 904 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.30]
2020-02-08 13:30:59.519 INFO 904 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-02-08 13:30:59.519 INFO 904 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 949 ms
2020-02-08 13:30:59.582 WARN 904 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'appController': Unsatisfied dependency expressed through field 'service'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userService': Unsatisfied dependency expressed through field 'repo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': Cannot create inner bean '(inner bean)#420745d7' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#420745d7': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available
2020-02-08 13:30:59.584 INFO 904 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2020-02-08 13:30:59.657 INFO 904 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-02-08 13:30:59.728 ERROR 904 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field repo in com.example.hello_world.UserService required a bean named 'entityManagerFactory' that could not be found.
The injection point has the following annotations:
- @org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean named 'entityManagerFactory' in your configuration.
我的xml文件
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>hello_world-1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>hello_world-1</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.eclipse.persistence/eclipselink -->
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.5.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/com.microsoft.sqlserver/mssql-jdbc -->
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>mssql-jdbc</artifactId>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>6.0.0.Alpha4</version>
<type>pom</type>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>6.0.0.Alpha4</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>mssql-jdbc</artifactId>
<scope>runtime</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-jpa -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
我的项目的第一个文件,
package com.example.hello_world;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
@SpringBootApplication
@EnableJpaRepositories
public class HelloWorld1Application {
public static void main(String[] args) {
SpringApplication.run(HelloWorld1Application.class, args);
}
}
我的服务文件UserService.Java
package com.example.hello_world;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.AutoConfigurationPackage;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
@Service
@EntityScan("com.example.hello_world")
@ComponentScan("com.example.hello_world")
public class UserService {
@Autowired
private UserRepository repo;
public List<UserInfo> listAll()
{
return repo.findAll();
}
public void save(UserInfo User)
{
repo.save(User);
}
public UserInfo get(Long id)
{
return repo.findById(id).get();
}
public void delete(Long id)
{
repo.deleteById(id);
}
}
我的存储库文件用户Repository.jav
package com.example.hello_world;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.AutoConfigurationPackage;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
@Service
@EntityScan("com.example.hello_world")
@ComponentScan("com.example.hello_world")
public class UserService {
@Autowired
private UserRepository repo;
public List<UserInfo> listAll()
{
return repo.findAll();
}
public void save(UserInfo User)
{
repo.save(User);
}
public UserInfo get(Long id)
{
return repo.findById(id).get();
}
public void delete(Long id)
{
repo.deleteById(id);
}
}
我的控制器文件应用程序Controller.java
package com.example.hello_world;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import java.util.List;
import org.springframework.ui.*;
@Controller
public class AppController
{
@Autowired
private UserService service;
@RequestMapping("/")
public String ViewHomePage(Model model)
{
List<UserInfo> listUserInfo = service.listAll();
model.addAttribute("listUserInfo", listUserInfo);
return "index";
}
}
2条答案
按热度按时间nukf8bse1#
恐怕你做事的方式不好。
您希望有一个Sping Boot 应用程序,带有Controller和Repository。对于controller,您的配置似乎没问题,但对于Repository,则不太好。
1.在Hibernate和EclipseLink之间做出决定。您的项目中导入了这两种方法。如果您不打算使用EclipseLink,那么请相信我,删除它并使用Hibernate。
1.您没有在POM中导入好的依赖项。
如果你不这样做,那么你最终会丢失某些必需的bean,比如
entityManagerFactoryBean
。实际上,启动依赖项是用来加载一堆AutoConfiguration类的,其中一个是用来配置entityManagerFactoryBean
的。以下是我为您推荐的POM:
给予看,结果告诉我。
fcwjkofz2#
我的情况也一样。我的问题是我忘了在我的
application-dev.properties:
中unexclude DataSourceAutoConfiguration