找不到字段映射器，请考虑定义bean

Question

客户服务实施

package com.application.service.impl;

@Service
public class CustomerServiceImpl implements CustomerService {

@Autowired
private CustomerRepository custRepo;

@Autowired
private CustomerMapper mapper;

@Autowired
private HMergeMapper mergeMapper;

@Override
public CustomerViewData addCustomer(CustomerData custData) {
    Customer cr = this.mapper.customerDataToCustomer(custData);
    cr = this.custRepo.save(cr);
    return this.mapper.fromCustToCustViewData(cr);
}
}

客户服务界面

package com.application.service;

@Component
public interface CustomerService {

CustomerViewData addCustomer(CustomerData custData);

}

客户映射器

package com.application.mapper;

@Mapper(componentModel = "spring")
public interface CustomerMapper {
CustomerMapper INSTANCE = Mappers.getMapper(CustomerMapper.class);

CustomerViewData fromCustToCustViewData(Customer entity);
}

主类

package com.application;

@EnableSwagger2
@SpringBootApplication
@ComponentScan(basePackages = { "com.application", "com.application.mapper" })
@EnableJpaRepositories(basePackages = {"com.application.repository"})
public class Application {

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

错误-

应用程序启动失败

说明：

com中的字段映射器。应用服务实施。CustomerServiceImpl需要“com”类型的bean。应用映射器。找不到CustomerMapper“”。

措施：

考虑定义“com”类型的bean。应用映射器。配置中的CustomerMapper。

Note - Package structure is Main Class in com.appliaction,
 Mapper class in com.application.mapper, 
 CustomerService class in com.application.service,
 CustomerServiceImpl class in com.application.service.impl

Answer 1

这是固定的，问题是maven插件。

         <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.mapstruct</groupId>
                            <artifactId>mapstruct-processor</artifactId>
                            <version>1.3.0.Final</version>
                        </path>
                    </annotationProcessorPaths>
                </configuration>
            </plugin>

Answer 2

删除CustomerMapper实例=映射器。getMapper（CustomerMapper.class） 内部CustomerMapper。班在我看来，这就像是递归的地狱。

您在CustomerMapper中。class，只需使用此操作即可

在CustomerMapper.class之外，只需使用自动装配即可使用映射器类。

您已经定义了组件模型="Spring"，因此它将绑定到Spring上下文。不要将映射器的手动检索与Spring上下文混合使用。

这可能会导致不创建实例，然后spring抛出错误。