Spring Boot中的UnsatisfiedDependencyException

Question

Main class:


package *.*.*;

@SpringBootApplication
public class BankApplication {

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

}
package *.*.*.dataaccess.repository;


@Repository
public interface BankRepository extends JpaRepository<BankEntity, String> {

}

package *.*.*.dataaccess.dao;

@Getter
@Setter
@ToString
@NoArgsConstructor
@AllArgsConstructor
@Entity
@Table(name = "Bank")
public class BankEntity {

//fileds
}



package *.*.*.dataaccess.utils;


@Component
public class DBUtils {

    @Autowired
    BankRepository bnRepo;

    
     */
    public void saveBank(BankDto dto) {
        
        //preparing  bnEntity -entity
        
            this.bnRepo.saveAndFlush(bnEntity);     

    }
}

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.flywaydb</groupId>
            <artifactId>flyway-core</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.wix/wix-embedded-mysql -->
        <dependency>
            <groupId>com.wix</groupId>
            <artifactId>wix-embedded-mysql</artifactId>
            <version>4.2.0</version>
        </dependency>

@ExtendWith(SpringExtension.class)
@SpringBootTest(classes = { DBUtils.class })
public class BankTest {

    @Autowired
    DBUtils dbUtils;

    @Test
    public void saveAndFlishTest() {

        dbUtils.saveBank(getBankDetails()); // once this is working then will added junit checks using asserts
    }
}

原因：org.springframework.beans.factory.UnsatisfiedDependencyException：创建名为“DBUtils”的bean时出错：通过字段“bn repo”表示的未满足的依赖项；嵌套异常为org.springframework.beans.factory.noSuchBeanDefinitionException：没有“.*.DataAccess.Repository.BankRepository”类型的合格bean可用：应至少有一个合格的自动候选bean。依赖项注释：{@org.SpringFramework.Beans.Factory.Annotation.AutoWired(required=true)}

Answer 1

bankrepository没有创建，因此会出现错误-没有这种类型的bean，因此没有任何东西可以注入（通过自动连接）。

您应该检查以下内容：

1. 启用Spring数据
2. BankRepository应该驻留在spring引导应用程序中要进行包扫描的包中