Spring Boot-沒有可用的名為'entityManagerFactory'的bean

Question

我有一個基於Spring Boot的簡單Web應用程序，該應用程序使用JPA和HSQLDB進行數據持久化，但是現在當我嘗試構建Project時，它失敗並顯示：

No bean named 'entityManagerFactory' available

我的代碼如下：

應用

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

@SpringBootApplication
@EnableScheduling
public class Application {

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

“ Comentario”表

package dashboard.model;

import java.util.Date;

import javax.persistence.*;

@Entity
@Table(name="TComentarios")
public class Comentario {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String contenido;
    @ManyToOne
    private Sugerencia sugerencia;
    @ManyToOne
    private Usuario usuario;
    @Temporal(TemporalType.DATE)
    private Date fecha;

    Comentario(){}

    get/set...
}

知識庫

import java.util.List;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.stereotype.Repository;

@Repository
public interface ComentarioRepository extends JpaRepository<Comentario, Long>{
@Query("select c from Comentario c where c.sugerencia = ?1")
List<Comentario> findBySugerencia(Sugerencia sugerencia);
}

pom.xml（依賴項）：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.4.RELEASE</version>
</parent>

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

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

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

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>

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

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <version>1.5.2.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.hsqldb</groupId>
        <artifactId>hsqldb</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-bus-kafka</artifactId>
        <version>1.2.2.RELEASE</version>
    </dependency>

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

    <dependency>
        <groupId>org.webjars</groupId>
        <artifactId>webjars-locator</artifactId>
    </dependency>

    <dependency>
        <groupId>org.webjars</groupId>
        <artifactId>sockjs-client</artifactId>
        <version>1.0.2</version>
    </dependency>

    <dependency>
        <groupId>org.webjars</groupId>
        <artifactId>stomp-websocket</artifactId>
        <version>2.3.3</version>
    </dependency>

    <dependency>
        <groupId>org.webjars</groupId>
        <artifactId>jquery</artifactId>
        <version>3.2.0</version><!--$NO-MVN-MAN-VER$-->
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.dataformat</groupId>
        <artifactId>jackson-dataformat-xml</artifactId>
    </dependency>

    <dependency>
        <groupId>org.codehaus.woodstox</groupId>
        <artifactId>woodstox-core-asl</artifactId>
        <version>4.4.1</version>
    </dependency>

</dependencies>

Answer 1

它可能不會解決您的問題，但是不建議覆蓋由spring-boot-starter-parent pom拉出的工件的依賴版本，並且可能產生副作用：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.4.RELEASE</version>
</parent>    
 ....    
<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <version>1.5.2.RELEASE</version>
</dependency>

應該足夠了：

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

對於大多數由starter pom提取的依賴項，這是正確的，但對於屬於org.springframework.boot groupId的，旨在與相同版本一起使用的依賴項，則org.springframework.boot 。