如何在Spring Boot应用中使用mapstruct，来映射一个带有一个条件的字段？

<dependencies>
    <!-- 其他依赖项 -->
    <dependency>
        <groupId>org.mapstruct</groupId>
        <artifactId>mapstruct</artifactId>
        <version>1.4.2.Final</version>
    </dependency>
    <!-- 其他依赖项 -->
</dependencies>

import org.mapstruct.Mapper;

@Mapper(componentModel = "spring")
public interface MyMapper {
    // 定义映射方法
}

import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import org.mapstruct.MappingTarget;

@Mapper(componentModel = "spring")
public interface MyMapper {
    @Mapping(target = "targetField", expression = "java(source.isCondition() ? \"value1\" : \"value2\")")
    void mapSourceToTarget(Source source, @MappingTarget Target target);
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class MyService {
    @Autowired
    private MyMapper myMapper;

    public void mapObjects(Source source, Target target) {
        myMapper.mapSourceToTarget(source, target);
    }
}