引入 MapStruct 让代码变得更简洁

pom文件修改

修改1

<properties>
    <maven.compiler.source>8</maven.compiler.source>
    <maven.compiler.target>8</maven.compiler.target>
    <m2e.apt.activation>jdt_apt</m2e.apt.activation>
    <org.mapstruct.version>1.5.5.Final</org.mapstruct.version>
    <lombok.version>1.18.18</lombok.version>
    <lombok-mapstruct-binding.version>0.2.0</lombok-mapstruct-binding.version>
</properties>

修改2

<dependency>
    <groupId>org.mapstruct</groupId>
    <artifactId>mapstruct</artifactId>
    <version>${org.mapstruct.version}</version>
</dependency>

修改3

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <mainClass>tech.foolfish.cpc.ccpbs.CcpbsApplication</mainClass>
                <fork>true</fork>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
                <generatedSourcesDirectory>${project.build.directory}/generated-sources</generatedSourcesDirectory>
                <annotationProcessorPaths>
                    <path>
                        <groupId>org.mapstruct</groupId>
                        <artifactId>mapstruct-processor</artifactId>
                        <version>${org.mapstruct.version}</version>
                    </path>
                    <path>
                        <groupId>org.projectlombok</groupId>
                        <artifactId>lombok</artifactId>
                        <version>${lombok.version}</version>
                    </path>
                    <path>
                        <groupId>org.projectlombok</groupId>
                        <artifactId>lombok-mapstruct-binding</artifactId>
                        <version>${lombok-mapstruct-binding.version}</version>
                    </path>
                </annotationProcessorPaths>
                <!-- due to problem in maven-compiler-plugin, for verbose mode add showWarnings -->
                <showWarnings>true</showWarnings>
                <compilerArgs>
                    <arg>-Amapstruct.suppressGeneratorTimestamp=true</arg>
                    <arg>-Amapstruct.suppressGeneratorVersionInfoComment=true</arg>
                    <arg>-Amapstruct.verbose=true</arg>
                </compilerArgs>
            </configuration>
        </plugin>
    </plugins>
</build>

代码案例

@Data
public class StationWhitelistEntity extends Creator {

    private Long id;

    private String stationId;

    private int itemStatus;

    private int preferenceStatus;

    private String stationName;

}

@Mapper
public interface WhitelistConverter {

    WhitelistConverter INSTANCE = Mappers.getMapper(WhitelistConverter.class);
    
    @Mapping(target = "id", ignore = true)
    @Mapping(target = "creatorId", constant = "99999L")
    @Mapping(target = "createTime", expression = "java(System.currentTimeMillis() / 1000)")
    @Mapping(target = "updatorId", constant = "99999L")
    @Mapping(target = "updateTime", expression = "java(System.currentTimeMillis() / 1000)")
    @Mapping(target = "deleteInd", constant = "0")
    StationWhitelistEntity updateStationWhitelistEntity(StationWhitelistEntity stationWhitelistEntity);
    
    List<StationWhitelistEntity> updateStationWhitelistEntities(List<StationWhitelistEntity> stationWhitelistEntities);

}

mapstruct自动生成的代码如下

@Generated(
    value = "org.mapstruct.ap.MappingProcessor"
)
public class WhitelistConverterImpl implements WhitelistConverter {

    @Override
    public StationWhitelistEntity updateStationWhitelistEntity(StationWhitelistEntity stationWhitelistEntity) {
        if ( stationWhitelistEntity == null ) {
            return null;
        }

        StationWhitelistEntity stationWhitelistEntity1 = new StationWhitelistEntity();

        stationWhitelistEntity1.setItemStatus( stationWhitelistEntity.getItemStatus() );
        stationWhitelistEntity1.setPreferenceStatus( stationWhitelistEntity.getPreferenceStatus() );
        stationWhitelistEntity1.setStationId( stationWhitelistEntity.getStationId() );
        stationWhitelistEntity1.setStationName( stationWhitelistEntity.getStationName() );

        stationWhitelistEntity1.setCreatorId( (long) 99999L );
        stationWhitelistEntity1.setCreateTime( System.currentTimeMillis() / 1000 );
        stationWhitelistEntity1.setUpdatorId( (long) 99999L );
        stationWhitelistEntity1.setUpdateTime( System.currentTimeMillis() / 1000 );
        stationWhitelistEntity1.setDeleteInd( 0 );

        return stationWhitelistEntity1;
    }

    @Override
    public List<StationWhitelistEntity> updateStationWhitelistEntities(List<StationWhitelistEntity> stationWhitelistEntities) {
        if ( stationWhitelistEntities == null ) {
            return null;
        }

        List<StationWhitelistEntity> list = new ArrayList<StationWhitelistEntity>( stationWhitelistEntities.size() );
        for ( StationWhitelistEntity stationWhitelistEntity : stationWhitelistEntities ) {
            list.add( updateStationWhitelistEntity( stationWhitelistEntity ) );
        }

        return list;
    }

}