我正在尝试使用Spring Boot，Hibernate和MySQL来执行基本的CRUD API。我关注this tutorial。我遇到了这个：
UnsatisfiedDependencyException: Error creating bean with name 'jpaContext': Unsatisfied dependency expressed through constructor parameter 0: No qualifying bean of type [java.util.Set] found for dependency [java.util.Set<javax.persistence.EntityManager>]。
这是我的pom.xml：
<?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</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</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-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.2.Final</version>
</dependency>
<!-- for JPA, use hibernate-entitymanager instead of hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.2.2.Final</version>
</dependency>
<!--<dependency>-->
<!--<groupId>org.eclipse.persistence</groupId>-->
<!--<artifactId>javax.persistence</artifactId>-->
<!--<version>2.0.0</version>-->
<!--</dependency>-->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-commons</artifactId>
<version>1.12.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>1.10.2.RELEASE</version>
</dependency>
<!-- I added the two above dependencies but the error is still there. -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
这是我的applicationContext.xml：
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<context:component-scan base-package="com.example" />
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<tx:annotation-driven transaction-manager="transactionManager"/>
<beans:bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close">
<beans:property name="driverClassName" value="com.mysql.jdbc.Driver" />
<beans:property name="url" value="jdbc:mysql://localhost:3306/todo" />
<beans:property name="username" value="root" />
<beans:property name="password" value="pass" />
</beans:bean>
<!-- Hibernate 5 SessionFactory Bean definition -->
<beans:bean id="hibernate5AnnotatedSessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<beans:property name="dataSource" ref="dataSource" />
<beans:property name="annotatedClasses">
<beans:list>
<beans:value>com.example.models.Todo</beans:value>
</beans:list>
</beans:property>
<beans:property name="hibernateProperties">
<beans:props>
<beans:prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect
</beans:prop>
<beans:prop key="hibernate.show_sql">true</beans:prop>
</beans:props>
</beans:property>
</beans:bean>
<beans:bean id="todoDAO" class="com.example.models.TodoDAOImpl">
<beans:property name="sessionFactory" ref="hibernate5AnnotatedSessionFactory" />
</beans:bean>
<beans:bean id="todoService" class="com.example.services.TodoServiceImpl">
<beans:property name="todoDAO" ref="todoDAO"></beans:property>
</beans:bean>
<beans:bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<beans:property name="sessionFactory" ref="hibernate5AnnotatedSessionFactory" />
</beans:bean>
</beans:beans>
我看到了这个SO post，但由于没有答案，所以没有多大帮助。我的理解是我使用Hibernate API来持久化具有JPA注释的对象。我是否需要在pom.xml中添加任何JPA依赖项？我真的很困惑。
非常感谢任何和所有帮助！我只想要一个简单的CRUD API设置，我认为我所遵循的教程非常全面。
答案 0 :(得分：0)
将Maven编译器插件添加到POM时是否有效？像这样：
IVA