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);

}

客户地图

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 -

应用程序无法启动

说明：

com.application.service.impl.CustomerServiceImpl 中的字段映射器需要一个无法找到的“com.application.mapper.CustomerMapper”类型的 bean。

操作：

考虑在您的配置中定义一个“com.application.mapper.CustomerMapper”类型的 bean。

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

删除 CustomerMapper.class 中的 CustomerMapper INSTANCE = Mappers.getMapper(CustomerMapper.class);。这对我来说似乎是递归地狱。

你在CustomerMapper.class里面，用this.做你想做的事

在 CustomerMapper.class 之外只需使用自动装配来使用映射器类。

您已经定义了 componentModel = "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 上下文混合在一起。

可能这会导致无法创建实例，然后 spring 抛出错误。

Answer 2

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>

找不到字段映射器，请考虑定义一个 bean

2 个答案: