Java 列表类型的对象上的MapStruct映射

我尝试将MapStruct用于类似于以下内容的结构：

@Data
public class ClassAEntity {
  private int id;
  private String name;
  private String numT;
  private List<ClassBEntity) bs;
}

@Data
public class ClassBEntity {
  private int id;
  private String name;
  private String numT;
  private List<Other> oc;
}

@Data
public class ClassA {
  private int id;
  private String name;
  private List<ClassB) bs;
}

@Data
public class ClassB {
  private int id;
  private String name;
  private List<Other> oc;
}

另一方面，我需要忽略classBEntity的参数oc，因为“other”对象包含classAEntity并形成一个循环对象。（因为我使用oneToMany JPA）。我尝试了以下方法：

@Data
public class ClassAEntity {
  private int id;
  private String name;
  private String numT;
  private List<ClassBEntity) bs;
}

@Data
public class ClassBEntity {
  private int id;
  private String name;
  private String numT;
  private List<Other> oc;
}

@Data
public class ClassA {
  private int id;
  private String name;
  private List<ClassB) bs;
}

@Data
public class ClassB {
  private int id;
  private String name;
  private List<Other> oc;
}

@Mapping（target=“bs[].oc”，ignore=true）

---

感谢您的帮助

MapStruct不支持为集合定义嵌套映射。您必须定义更明确的方法

例如，要将

numT

映射到

bs[].numT

并忽略

bs[].oc

您需要执行以下操作：

@Mapper
public MyMapper {

    default ClassAEntity map(ClassA classA, String numT) {
        return map(classA, numT, numT);
    }
    
    ClassAEntity map(ClassA classA, String numT, @Context String numT);

    @AfterMapping
    default void setNumTOnClassBEntity(@MappingTarget ClassBEntity classB, @Context String numT) {
        classB.setNumT(numT);
    }

    @Mapping(target = "oc", ignore = "true")
    ClassBEntity map(ClassB classB);

}

---

MapStruct不支持为集合定义嵌套映射。您必须定义更明确的方法

例如，要将

numT

映射到

bs[].numT

并忽略

bs[].oc

您需要执行以下操作：

@Mapper
public MyMapper {

    default ClassAEntity map(ClassA classA, String numT) {
        return map(classA, numT, numT);
    }
    
    ClassAEntity map(ClassA classA, String numT, @Context String numT);

    @AfterMapping
    default void setNumTOnClassBEntity(@MappingTarget ClassBEntity classB, @Context String numT) {
        classB.setNumT(numT);
    }

    @Mapping(target = "oc", ignore = "true")
    ClassBEntity map(ClassB classB);

}