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								<p><strong><a href="/category/web/Spring">web/Spring</a></strong></p><h3>[Spring] MapStruct - Entity와 DTO 매핑하기</h3>
								<p><span>ner.o
                                <span></span>2022. 11. 7. 13:49
								
							</span>
							</p></div>

							<div><h3 data-ke-size="size23"><b><span>MapStruct</span></b></h3>
<ul data-ke-list-type="disc">
<li>Mapstruct란?</li>
<li>Dependency 설정</li>
<li>사용법
<ul data-ke-list-type="disc">
<li>Entity, Dto 클래스를 만들어보자.</li>
<li>Mapper를 만들자.</li>
<li>빌드를 진행하자.</li>
</ul>
</li>
</ul>
<h4 data-ke-size="size20"><b><span>MapStruct</span>란?</b></h4>
<blockquote data-ke-style="style3">MapStruct is a code generator that greatly simplifies the implementation of mappings between Java bean types based on a convention over configuration approach.</blockquote>
<p data-ke-size="size16"><span>MapStruct는 구성접근법에 대한 규약에 근거하여 Java Bean 종류 간의 <span><b>매핑 구현을 크게 단순화</b></span>한 code generator이다.</span><span></span></p>

<p data-ke-size="size16"><b><span><span>&nbsp;참고&nbsp;</span> 아래는 Java Mapping 프레임 워크 성능을 비교한 글이다.</span></b></p>
<p data-ke-size="size16"><span><a href="https://www.baeldung.com/java-performance-mapping-frameworks" target="_blank" rel="noopener">https://www.baeldung.com/java-performance-mapping-frameworks</a></span></p>
<figure id="og_1664787291474" contenteditable="false" data-ke-type="opengraph" data-ke-align="alignCenter" data-og-type="article" data-og-title="Performance of Java Mapping Frameworks | Baeldung" data-og-description="Compare the performance of the most popular Java mapping frameworks." data-og-host="www.baeldung.com" data-og-source-url="https://www.baeldung.com/java-performance-mapping-frameworks" data-og-url="https://www.baeldung.com/java-performance-mapping-frameworks" data-og-image="https://scrap.kakaocdn.net/dn/bXaQxT/hyPY5jR8Dl/zVmLpXp6kDdraXy0biE1j1/img.jpg?width=1200&amp;height=628&amp;face=0_0_1200_628,https://scrap.kakaocdn.net/dn/blA1hB/hyP0zp6Ek9/kFhko1e01VQvmiLBOzPVJ0/img.jpg?width=1200&amp;height=628&amp;face=0_0_1200_628"><a href="https://www.baeldung.com/java-performance-mapping-frameworks" target="_blank" rel="noopener" data-source-url="https://www.baeldung.com/java-performance-mapping-frameworks">

<div>
<p data-ke-size="size16">Performance of Java Mapping Frameworks | Baeldung</p>
<p data-ke-size="size16">Compare the performance of the most popular Java mapping frameworks.</p>
<p data-ke-size="size16">www.baeldung.com</p>
</div>
</a><img src="https://scrap.kakaocdn.net/dn/bXaQxT/hyPY5jR8Dl/zVmLpXp6kDdraXy0biE1j1/img.jpg?width=1200&amp;height=628&amp;face=0_0_1200_628,https://scrap.kakaocdn.net/dn/blA1hB/hyP0zp6Ek9/kFhko1e01VQvmiLBOzPVJ0/img.jpg?width=1200&amp;height=628&amp;face=0_0_1200_628"></figure>
<p data-ke-size="size16"><b><span>&nbsp;참고&nbsp;</span> 아래는 ModelMapper 라이브러리에 대해 정리한 글이다.</b></p>
<p data-ke-size="size16"><a href="https://frogand.tistory.com/180" target="_blank" rel="noopener">https://frogand.tistory.com/180</a></p>
<figure id="og_1667715230884" contenteditable="false" data-ke-type="opengraph" data-ke-align="alignCenter" data-og-type="article" data-og-title="[Java] ModelMapper 라이브러리" data-og-description="ModelMapper 라이브러리 의존성 추가 build.gradle implementation 'org.modelmapper:modelmapper:2.4.2' 변환 클래스들 정의 // 모든 클래스 Constructor, Getter, Setter 생략 class Address { String street; String city; } class Name { String" data-og-host="frogand.tistory.com" data-og-source-url="https://frogand.tistory.com/180" data-og-url="https://frogand.tistory.com/180" data-og-image="https://scrap.kakaocdn.net/dn/bz6wov/hyQtuCbCXv/ziVG59xsPh6AXZKCGs3Hpk/img.png?width=800&amp;height=800&amp;face=0_0_800_800,https://scrap.kakaocdn.net/dn/bvzyr7/hyQtvOCjcK/Ke3dp7BMnwC8YOyvCTIAX1/img.png?width=800&amp;height=800&amp;face=0_0_800_800,https://scrap.kakaocdn.net/dn/AtM4y/hyQtAWID8l/LPGXRF3NtyBvPnnWjFBjc1/img.jpg?width=2641&amp;height=3024&amp;face=0_0_2641_3024"><a href="https://frogand.tistory.com/180" target="_blank" rel="noopener" data-source-url="https://frogand.tistory.com/180">

<div>
<p data-ke-size="size16">[Java] ModelMapper 라이브러리</p>
<p data-ke-size="size16">ModelMapper 라이브러리 의존성 추가 build.gradle implementation 'org.modelmapper:modelmapper:2.4.2' 변환 클래스들 정의 // 모든 클래스 Constructor, Getter, Setter 생략 class Address { String street; String city; } class Name { String</p>
<p data-ke-size="size16">frogand.tistory.com</p>
</div>
</a><img src="https://scrap.kakaocdn.net/dn/bz6wov/hyQtuCbCXv/ziVG59xsPh6AXZKCGs3Hpk/img.png?width=800&amp;height=800&amp;face=0_0_800_800,https://scrap.kakaocdn.net/dn/bvzyr7/hyQtvOCjcK/Ke3dp7BMnwC8YOyvCTIAX1/img.png?width=800&amp;height=800&amp;face=0_0_800_800,https://scrap.kakaocdn.net/dn/AtM4y/hyQtAWID8l/LPGXRF3NtyBvPnnWjFBjc1/img.jpg?width=2641&amp;height=3024&amp;face=0_0_2641_3024"></figure>

<p data-ke-size="size16">* MapStruct는 시간당 처리량이 높다.</p>

<h4 data-ke-size="size20"><b>Dependency 설정 (의존성 설정)</b></h4>
<p data-ke-size="size16"><b><span>&nbsp;참고&nbsp;</span> MapStruct 가이드</b></p>
<p data-ke-size="size16"><a href="https://mapstruct.org/documentation/spring-extensions/reference/html/" target="_blank" rel="noopener">https://mapstruct.org/documentation/spring-extensions/reference/html/</a></p>
<figure id="og_1664787676390" contenteditable="false" data-ke-type="opengraph" data-ke-align="alignCenter" data-og-type="website" data-og-title="MapStruct Spring Extensions 0.1.2 Reference Guide" data-og-description="MapStruct Spring Extensions is a Java annotation processor based on JSR 269 and as such can be used within command line builds (javac, Ant, Maven etc.) as well as from within your IDE. Also, you will need MapStruct itself (at least version 1.4.0.Final) in " data-og-host="mapstruct.org" data-og-source-url="https://mapstruct.org/documentation/spring-extensions/reference/html/" data-og-url="https://mapstruct.org/documentation/spring-extensions/reference/html/" data-og-image=""><a href="https://mapstruct.org/documentation/spring-extensions/reference/html/" target="_blank" rel="noopener" data-source-url="https://mapstruct.org/documentation/spring-extensions/reference/html/">

<div>
<p data-ke-size="size16">MapStruct Spring Extensions 0.1.2 Reference Guide</p>
<p data-ke-size="size16">MapStruct Spring Extensions is a Java annotation processor based on JSR 269 and as such can be used within command line builds (javac, Ant, Maven etc.) as well as from within your IDE. Also, you will need MapStruct itself (at least version 1.4.0.Final) in</p>
<p data-ke-size="size16">mapstruct.org</p>
</div>
</a></figure>
<p data-ke-size="size16">1. maven 설정</p>
<pre id="code_1664787394358" data-ke-language="shell" data-ke-type="codeblock"><code>&lt;dependency&gt;
    &lt;groupId&gt;org.mapstruct&lt;/groupId&gt;
    &lt;artifactId&gt;mapstruct&lt;/artifactId&gt;
    &lt;version&gt;1.5.2.Final&lt;/version&gt;
&lt;/dependency&gt;

&lt;build&gt;
    &lt;plugins&gt;
        &lt;plugin&gt;
            &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
            &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
            &lt;version&gt;3.5.1&lt;/version&gt;
            &lt;configuration&gt;
                &lt;source&gt;1.8&lt;/source&gt;
                &lt;target&gt;1.8&lt;/target&gt;
                &lt;annotationProcessorPaths&gt;
                    &lt;path&gt;
                        &lt;groupId&gt;org.mapstruct&lt;/groupId&gt;
                        &lt;artifactId&gt;mapstruct-processor&lt;/artifactId&gt;
                        &lt;version&gt;1.5.2.Final&lt;/version&gt;
                    &lt;/path&gt;
                &lt;/annotationProcessorPaths&gt;
            &lt;/configuration&gt;
        &lt;/plugin&gt;
    &lt;/plugins&gt;
&lt;/build&gt;</code></pre>
<p data-ke-size="size16">2. gradle 설정</p>
<pre id="code_1664787671338" data-ke-language="shell" data-ke-type="codeblock"><code>dependencies {
    implementation 'org.mapstruct:mapstruct:1.5.2.Final'
    annotationProcessor "org.mapstruct:mapstruct-processor:1.5.2.Final"
    annotationProcessor 'org.projectlombok:lombok-mapstruct-binding:0.2.0'
	
	compileOnly 'org.projectlombok:lombok:1.18.22'
    annotationProcessor 'org.projectlombok:lombok:1.18.22'
}</code></pre>

<h4 data-ke-size="size20"><b>사용법</b></h4>
<p data-ke-size="size16"><b>1. 예시를 위한 Entity와 Dto 클래스를 만들어보자.</b></p>
<pre id="code_1667715372138" data-ke-language="java" data-ke-type="codeblock"><code>import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.EqualsAndHashCode;
import lombok.Getter;

import java.time.LocalDateTime;

@AllArgsConstructor
@Getter
@Builder
@EqualsAndHashCode
public class Order {

    private Long id;
    private String name;
    private String product;
    private Integer price;
    private String address;
    private LocalDateTime orderedTime;
}</code></pre>
<pre id="code_1667715399344" data-ke-language="java" data-ke-type="codeblock"><code>import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Getter;

import java.time.LocalDateTime;

@Data
@AllArgsConstructor
@Builder
class OrderDto {

    private String name;
    private String product;
    private Integer price;
    private String address;
    private String img;
    private LocalDateTime orderedTime;
}</code></pre>
<p data-ke-size="size16">* OrderDto 클래스에는 Long id 필드가 존재하지 않고, String img 필드가 만들어졌다.</p>
<p data-ke-size="size16">* 변환해서 저장하고자 하는 객체에는 <b>Builder 혹은 모든 필드를 담을 수 있는 생성자</b>가 있어야 한다.</p>

<p data-ke-size="size16"><b>2. 이를 매핑하는 OrderMapper를 만들어보자.</b></p>
<pre id="code_1667716411336" data-ke-language="java" data-ke-type="codeblock"><code>import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import org.mapstruct.factory.Mappers;

@Mapper // (1)
public interface OrderMapper {
    OrderMapper INSTANCE = Mappers.getMapper(OrderMapper.class); // (2)

    @Mapping(target = "id", constant = "0L") // (3)
    Order convertOrderDtoToEntity(OrderDto orderDto);

    @Mapping(target = "img", expression = "java(order.getProduct() + \".jpg\")") // (4)
    OrderDto convertOrderToDto(Order order);
}</code></pre>
<p data-ke-size="size16">(1) <span><b>@Mapper 어노테이션</b></span>이 있어야 Mapstruct를 사용할 수 있다.</p>
<p data-ke-size="size16">(2) 해당하는 Instance가 OrderMapper를 상속받아서 orderMapperImpl를 구현하게 될 것이다.&nbsp;</p>
<p data-ke-size="size16">(3) 일반적인 경우에 <span><b>@Mapping 어노테이션</b></span>을 붙이면 된다. Order 에는 id 필드가 존재하기 때문에 id 필드를 0L로 지정하겠다는 의미이다. (ignore 파라미터를 사용하면 0L로 지정하는 것이 아니라 해당 필드를 무시할 수 있다.)</p>
<p data-ke-size="size16">(4) OrderDto에는 img 필드가 존재하기 때문에 expression을 기반으로 img 필드를 지정할 수 있다.</p>

<p data-ke-size="size16"><b>3. 빌드 진행 후, MapperImpl 클래스가 생성된다.</b></p>
<pre id="code_1667716983510" data-ke-language="java" data-ke-type="codeblock"><code>import java.time.LocalDateTime;
import javax.annotation.processing.Generated;

@Generated(
    value = "org.mapstruct.ap.MappingProcessor",
    date = "2022-11-04T15:46:35+0900",
    comments = "version: 1.5.2.Final, compiler: javac, environment: Java 1.8.0_311 (Oracle Corporation)"
)
public class OrderMapperImpl implements OrderMapper {

    @Override
    public Order orderDtoToEntity(OrderDto orderDto) {
        if ( orderDto == null ) {
            return null;
        }

        String name = null;
        String product = null;
        Integer price = null;
        String address = null;
        LocalDateTime orderedTime = null;

        name = orderDto.getName();
        product = orderDto.getProduct();
        price = orderDto.getPrice();
        address = orderDto.getAddress();
        orderedTime = orderDto.getOrderedTime();

        Long id = (long) 0L;

        Order order = new Order( id, name, product, price, address, orderedTime );

        return order;
    }

    @Override
    public OrderDto orderToDto(Order order) {
        if ( order == null ) {
            return null;
        }

        String name = null;
        String product = null;
        Integer price = null;
        String address = null;
        LocalDateTime orderedTime = null;

        name = order.getName();
        product = order.getProduct();
        price = order.getPrice();
        address = order.getAddress();
        orderedTime = order.getOrderedTime();

        String img = order.getProduct() + ".jpg";

        OrderDto orderDto = new OrderDto( name, product, price, address, img, orderedTime );

        return orderDto;
    }
}</code></pre>

<p data-ke-size="size16">해당 코드를 보면 나는 interface로 메소드만 만들어줬을 뿐인데, Mapper 클래스가 만들어진 것을 확인할 수 있다.</p>
<pre id="code_1667717269167" data-ke-language="java" data-ke-type="codeblock"><code>OrderMapper orderMapper = Mappers.getMapper(OrderMapper.class);
// .. 생략
Order order = orderMapper.convertOrderDtoToEntity(orderDto);</code></pre>
<p data-ke-size="size16">위와 같이 OrderMapper를 활용해서 변환작업을 쉽게 처리할 수 있다.</p>

<p data-ke-size="size16"><span><b>&nbsp;출처&nbsp;</b></span></p>
<p data-ke-size="size16"><a href="https://huisam.tistory.com/entry/mapStruct" target="_blank" rel="noopener">https://huisam.tistory.com/entry/mapStruct</a></p>
<figure id="og_1664787799033" contenteditable="false" data-ke-type="opengraph" data-ke-align="alignCenter" data-og-type="article" data-og-title="Spring Mapstruct - Java Entity DTO 매핑을 편하게 하자!" data-og-description="MapStruct? 안녕하세요~! ㅎㅎ 오늘은 Spring을 쓰면서 자주 쓰게 되는 라이브러리를 하나 소개할까 합니다! 바로 그것이 MapStruct 인데요! 이 Mapstruct란? MapStruct is a code generator that greatly simpli.." data-og-host="huisam.tistory.com" data-og-source-url="https://huisam.tistory.com/entry/mapStruct" data-og-url="https://huisam.tistory.com/entry/mapStruct" data-og-image="https://scrap.kakaocdn.net/dn/IJUkl/hyP0KFbi9z/f8Y7Iwx9kXqB69q9XlQ39k/img.png?width=428&amp;height=118&amp;face=0_0_428_118,https://scrap.kakaocdn.net/dn/S37EK/hyPYWUN5Ok/5JfJbKdJ6sXLZkTMc0fAVk/img.png?width=428&amp;height=118&amp;face=0_0_428_118,https://scrap.kakaocdn.net/dn/Vk5BY/hyP0JM2l3g/voD0xELcSePlkZeWKTBbkk/img.jpg?width=609&amp;height=281&amp;face=0_0_609_281"><a href="https://huisam.tistory.com/entry/mapStruct" target="_blank" rel="noopener" data-source-url="https://huisam.tistory.com/entry/mapStruct">

<div>
<p data-ke-size="size16">Spring Mapstruct - Java Entity DTO 매핑을 편하게 하자!</p>
<p data-ke-size="size16">MapStruct? 안녕하세요~! ㅎㅎ 오늘은 Spring을 쓰면서 자주 쓰게 되는 라이브러리를 하나 소개할까 합니다! 바로 그것이 MapStruct 인데요! 이 Mapstruct란? MapStruct is a code generator that greatly simpli..</p>
<p data-ke-size="size16">huisam.tistory.com</p>
</div>
</a><img src="https://scrap.kakaocdn.net/dn/IJUkl/hyP0KFbi9z/f8Y7Iwx9kXqB69q9XlQ39k/img.png?width=428&amp;height=118&amp;face=0_0_428_118,https://scrap.kakaocdn.net/dn/S37EK/hyPYWUN5Ok/5JfJbKdJ6sXLZkTMc0fAVk/img.png?width=428&amp;height=118&amp;face=0_0_428_118,https://scrap.kakaocdn.net/dn/Vk5BY/hyP0JM2l3g/voD0xELcSePlkZeWKTBbkk/img.jpg?width=609&amp;height=281&amp;face=0_0_609_281"></figure>
<p data-ke-size="size16"><a href="https://mapstruct.org/documentation/stable/reference/html/" target="_blank" rel="noopener">https://mapstruct.org/documentation/stable/reference/html/</a></p>
<figure id="og_1664787941804" contenteditable="false" data-ke-type="opengraph" data-ke-align="alignCenter" data-og-type="website" data-og-title="MapStruct 1.5.2.Final Reference Guide" data-og-description="If set to true, MapStruct in which MapStruct logs its major decisions. Note, at the moment of writing in Maven, also showWarnings needs to be added due to a problem in the maven-compiler-plugin configuration." data-og-host="mapstruct.org" data-og-source-url="https://mapstruct.org/documentation/stable/reference/html/" data-og-url="https://mapstruct.org/documentation/stable/reference/html/" data-og-image=""><a href="https://mapstruct.org/documentation/stable/reference/html/" target="_blank" rel="noopener" data-source-url="https://mapstruct.org/documentation/stable/reference/html/">

<div>
<p data-ke-size="size16">MapStruct 1.5.2.Final Reference Guide</p>
<p data-ke-size="size16">If set to true, MapStruct in which MapStruct logs its major decisions. Note, at the moment of writing in Maven, also showWarnings needs to be added due to a problem in the maven-compiler-plugin configuration.</p>
<p data-ke-size="size16">mapstruct.org</p>
</div>
</a></figure>
</div>
							

							
								
							

							


						
					
                    
                

					

					

					

					

					

					
				</div></div>

개구린개구리

MapStruct
Mapstruct란?
Dependency 설정
사용법
Entity, Dto 클래스를 만들어보자.
Mapper를 만들자.
빌드를 진행하자.
MapStruct란?
MapStruct is a code generator that greatly simplifies the implementation of mappings between Java bean types based on a convention over configuration approach.
MapStruct는 구성접근법에 대한 규약에 근거하여 Java Bean 종류 간의 매핑 구현을 크게 단순화한 code generator이다.
 
 참고  아래는 Java Mapping 프레임 워크 성능을 비교한 글이다.
https://www.baeldung.com/java-performance-mapping-frameworks
 참고  아래는 ModelMapper 라이브러리에 대해 정리한 글이다.
https://frogand.tistory.com/180
 
* MapStruct는 시간당 처리량이 높다.
 
Dependency 설정 (의존성 설정)
 참고  MapStruct 가이드
https://mapstruct.org/documentation/spring-extensions/reference/html/
1. maven 설정
<dependency>
    <groupId>org.mapstruct</groupId>
    <artifactId>mapstruct</artifactId>
    <version>1.5.2.Final</version>
</dependency>
<build>
    <plugins>
        <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>1.5.2.Final</version>
                    </path>
                </annotationProcessorPaths>
            </configuration>
        </plugin>
    </plugins>
</build>
2. gradle 설정
dependencies {
    implementation 'org.mapstruct:mapstruct:1.5.2.Final'
    annotationProcessor "org.mapstruct:mapstruct-processor:1.5.2.Final"
    annotationProcessor 'org.projectlombok:lombok-mapstruct-binding:0.2.0'
	
	compileOnly 'org.projectlombok:lombok:1.18.22'
    annotationProcessor 'org.projectlombok:lombok:1.18.22'
}
 
사용법
1. 예시를 위한 Entity와 Dto 클래스를 만들어보자.
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import java.time.LocalDateTime;
@AllArgsConstructor
@Getter
@Builder
@EqualsAndHashCode
public class Order {
    private Long id;
    private String name;
    private String product;
    private Integer price;
    private String address;
    private LocalDateTime orderedTime;
}
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Getter;
import java.time.LocalDateTime;
@Data
@AllArgsConstructor
@Builder
class OrderDto {
    private String name;
    private String product;
    private Integer price;
    private String address;
    private String img;
    private LocalDateTime orderedTime;
}
* OrderDto 클래스에는 Long id 필드가 존재하지 않고, String img 필드가 만들어졌다.
* 변환해서 저장하고자 하는 객체에는 Builder 혹은 모든 필드를 담을 수 있는 생성자가 있어야 한다.
 
2. 이를 매핑하는 OrderMapper를 만들어보자.
import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import org.mapstruct.factory.Mappers;
@Mapper // (1)
public interface OrderMapper {
    OrderMapper INSTANCE = Mappers.getMapper(OrderMapper.class); // (2)
    @Mapping(target = "id", constant = "0L") // (3)
    Order convertOrderDtoToEntity(OrderDto orderDto);
    @Mapping(target = "img", expression = "java(order.getProduct() + \".jpg\")") // (4)
    OrderDto convertOrderToDto(Order order);
}
(1) @Mapper 어노테이션이 있어야 Mapstruct를 사용할 수 있다.
(2) 해당하는 Instance가 OrderMapper를 상속받아서 orderMapperImpl를 구현하게 될 것이다. 
(3) 일반적인 경우에 @Mapping 어노테이션을 붙이면 된다. Order 에는 id 필드가 존재하기 때문에 id 필드를 0L로 지정하겠다는 의미이다. (ignore 파라미터를 사용하면 0L로 지정하는 것이 아니라 해당 필드를 무시할 수 있다.)
(4) OrderDto에는 img 필드가 존재하기 때문에 expression을 기반으로 img 필드를 지정할 수 있다.
 
3. 빌드 진행 후, MapperImpl 클래스가 생성된다.
import java.time.LocalDateTime;
import javax.annotation.processing.Generated;
@Generated(
    value = "org.mapstruct.ap.MappingProcessor",
    date = "2022-11-04T15:46:35+0900",
    comments = "version: 1.5.2.Final, compiler: javac, environment: Java 1.8.0_311 (Oracle Corporation)"
)
public class OrderMapperImpl implements OrderMapper {
    @Override
    public Order orderDtoToEntity(OrderDto orderDto) {
        if ( orderDto == null ) {
            return null;
        }
        String name = null;
        String product = null;
        Integer price = null;
        String address = null;
        LocalDateTime orderedTime = null;
        name = orderDto.getName();
        product = orderDto.getProduct();
        price = orderDto.getPrice();
        address = orderDto.getAddress();
        orderedTime = orderDto.getOrderedTime();
        Long id = (long) 0L;
        Order order = new Order( id, name, product, price, address, orderedTime );
        return order;
    }
    @Override
    public OrderDto orderToDto(Order order) {
        if ( order == null ) {
            return null;
        }
        String name = null;
        String product = null;
        Integer price = null;
        String address = null;
        LocalDateTime orderedTime = null;
        name = order.getName();
        product = order.getProduct();
        price = order.getPrice();
        address = order.getAddress();
        orderedTime = order.getOrderedTime();
        String img = order.getProduct() + ".jpg";
        OrderDto orderDto = new OrderDto( name, product, price, address, img, orderedTime );
        return orderDto;
    }
}
 
해당 코드를 보면 나는 interface로 메소드만 만들어줬을 뿐인데, Mapper 클래스가 만들어진 것을 확인할 수 있다.
OrderMapper orderMapper = Mappers.getMapper(OrderMapper.class);
// .. 생략
Order order = orderMapper.convertOrderDtoToEntity(orderDto);
위와 같이 OrderMapper를 활용해서 변환작업을 쉽게 처리할 수 있다.
 
 출처 
https://huisam.tistory.com/entry/mapStruct
https://mapstruct.org/documentation/stable/reference/html/

[Spring] MapStruct - Entity와 DTO 매핑하기

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