MAPSTRUCT-CustomerServiceImpl中的字段mapperDTO要求找到类型为'com.howtodoinjava.demo.mapper.MapperDTO'的bean

问题描述 投票：0回答：2

我正在使用api rest构建一个原始应用程序，而我将使用mapstruct库，但我不能。当我尝试使用自定义对象映射通过读取数据库返回的数据时，出现以下错误

您能帮我解决这个问题吗？我收到以下错误

申请无法开始

说明：

无法找到com.howtodoinjava.demo.service.CustomerServiceImpl中的字段mapperDTO的类型为com.howtodoinjava.demo.mapper.MapperDTO的bean。

注入点具有以下注释：-@ org.springframework.beans.factory.annotation.Autowired（required = true）

动作：

考虑在您的配置中定义类型为'com.howtodoinjava.demo.mapper.MapperDTO'的bean。

我的文件

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.howtodoinjava</groupId>
        <artifactId>demo</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <name>demo</name>
        <description>Demo project for Spring Boot</description>

        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.2.4.RELEASE</version>
        </parent>

        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <org.mapstruct.version>1.3.1.Final</org.mapstruct.version>
            <org.projectlombok.version>1.18.10</org.projectlombok.version>
            <m2e.apt.activation>jdt_apt</m2e.apt.activation>
        </properties>

        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <!-- <dependency> -->
            <!-- <groupId>com.jayway.jsonpath</groupId> -->
            <!-- <artifactId>json-path</artifactId> -->
            <!-- <scope>test</scope> -->
            <!-- </dependency> -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-hateoas</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.hateoas</groupId>
                <artifactId>spring-hateoas</artifactId>
            </dependency>
            <dependency>
                <groupId>com.ibm.db2</groupId>
                <artifactId>jcc</artifactId>
                <version>11.5.0.0</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-jpa</artifactId>
            </dependency>
            <!-- lombok -->
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <scope>provided</scope>
            </dependency>

            <!-- Map strunct -->
            <dependency>
                <groupId>org.mapstruct</groupId>
                <artifactId>mapstruct</artifactId>
                <version>1.3.1.Final</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.mapstruct/mapstruct-jdk8 -->
            <dependency>
                <groupId>org.mapstruct</groupId>
                <artifactId>mapstruct-jdk8</artifactId>
                <version>1.3.1.Final</version>
            </dependency>

            <!-- json logback -->
            <dependency>
                <groupId>ch.qos.logback.contrib</groupId>
                <artifactId>logback-json-classic</artifactId>
                <version>0.1.5</version>
            </dependency>

            <dependency>
                <groupId>ch.qos.logback.contrib</groupId>
                <artifactId>logback-jackson</artifactId>
                <version>0.1.5</version>
            </dependency>

            <!-- swagger -->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>2.9.2</version>
            </dependency>
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>2.9.2</version>
            </dependency>

            <!-- Utility -->
            <dependency>
                <groupId>commons-io</groupId>
                <artifactId>commons-io</artifactId>
                <version>2.6</version>
            </dependency>

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

            <dependency>
                <groupId>de.bwaldvogel</groupId>
                <artifactId>mongo-java-server</artifactId>
                <version>1.16.0</version>
                <scope>test</scope>
            </dependency>

        </dependencies>

        <build>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <configuration>
                        <annotationProcessorPaths>
                            <path>
                                <groupId>org.mapstruct</groupId>
                                <artifactId>mapstruct-processor</artifactId>
                                <version>1.3.1.Final</version>
                            </path>
                            <path>
                                <groupId>org.projectlombok</groupId>
                                <artifactId>lombok</artifactId>
                                <version>${org.projectlombok.version}</version>
                            </path>
                        </annotationProcessorPaths>
    <!--                    <compilerArgs> -->
    <!--                        <arg>-Amapstruct.defaultComponentModel=spring</arg> -->
    <!--                    </compilerArgs> -->
                    </configuration>
                </plugin>

                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>

            </plugins>
        </build>

    </project>

MapperDTO.java

@Mapper(componentModel="spring")
/*Durante la compilazione, MapStruct genererà un'implementazione di questa interfaccia.*/
public interface MapperDTO {

    //MapperDTO INSTANCE = Mappers.getMapper(MapperDTO.class);

    Customer customerDTOtoCustomer(CustomerDTO customerDTO);

    CustomerDTO customertoCustomerDTO(Customer customer);
}

ServiceImpl.java

@Autowired
    private MapperDTO mapperDTO;

    @Override
    public Customer getCustomerById(Integer id) throws RecordNotFoundException {
        Optional<CustomerDTO> utentiEntity = repository.findById(id);
            try {
                if (utentiEntity.isPresent()) {
                    return mapperDTO.customerDTOtoCustomer(utentiEntity.get());
                } else {
                    throw new RecordNotFoundException("No entity record exist for given id");
                }
            }
            catch (Exception e ) {
                log.error(" message  " +e.getMessage(),e);
            }
            return null;
    }

demoapplication.java

@SpringBootApplication(scanBasePackages="com.howtodoinjava.demo")
@EnableJpaRepositories (basePackages="com.howtodoinjava.demo.repository")
@EntityScan(basePackages="com.howtodoinjava.demo.modelDTO")
@ComponentScan({"com.howtodoinjava.demo.service","com.howtodoinjava.demo.controller", "com.howtodoinjava.demo.mapper"})

public class DemoApplication {

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

}
java spring maven crud mapstruct
2个回答
0
投票

我认为mapstruct jar不正确，否则它将在运行时动态地将实体转换为dto并将dto转换为实体。但是，如果您不想使用mapstruct，则可以通过提供这样的方法实现来手动进行转换。

@Override
public ProductDTO toProductDTO(Products products) {
    if (products == null) {
        return null;
    }
    ProductDTO productDTO = new ProductDTO();
    productDTO.setName(products.getName());
    productDTO.setDescription(products.getDescription());
    productDTO.setPrice(products.getPrice());
    return productDTO;
}

@Override
public List<ProductDTO> toProductDTOs(List<Products> products) {

    if (products == null) {
        return null;
    }
    List<ProductDTO> listproductdto = new ArrayList<ProductDTO>();
    for (Products eachproducts : products) {
        listproductdto.add(toProductDTO(eachproducts));
    }
    return listproductdto;
}

@Override
public Products toProduct(ProductDTO productDTO) {
    // TODO Auto-generated method stub
    if (productDTO == null) {
        return null;
    }
    Products products = new Products();
    products.setName(productDTO.getName());
    products.setPrice(productDTO.getPrice());
    products.setDescription(productDTO.getDescription());
    return products;
}

有关更多详细信息，您可以检查我的示例，我也尝试过相同的示例。从这里enter link description here

0
投票

使用

   <dependency>
      <groupId>org.mapstruct</groupId>
      <artifactId>mapstruct-processor</artifactId>
      <version>1.3.1.Final</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.mapstruct</groupId>
      <artifactId>mapstruct</artifactId>
      <version>1.3.1.Final</version>
    </dependency>

并且在编译时，请检查地图结构是否在目标中生成了MapperDTOImpl类

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