下面是我试图Map的对象的类：

package com.agent.module.entities;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import org.hibernate.annotations.Cascade;
import org.hibernate.annotations.CascadeType;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.experimental.Accessors;
@Entity
@Getter @Setter @NoArgsConstructor
@Accessors
public class Accommodation {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String location;
    @ManyToOne(optional=false, fetch=FetchType.EAGER)
    private AccommodationType type;
    private String description;
    private String name;
    @OneToMany(orphanRemoval=true, fetch=FetchType.EAGER)
    @Cascade(CascadeType.ALL)
    private Set<Document> images;
    private Integer capacity;
    @ManyToMany(fetch=FetchType.EAGER)
    private Set<AdditionalService> additionalServices;
    @OneToMany(orphanRemoval=true, fetch=FetchType.EAGER)
    @Cascade(CascadeType.ALL)
    private Set<PricePlan> pricePlan;
    @ManyToOne(optional=false, fetch=FetchType.LAZY)
    private Agent agent;
    @OneToMany(orphanRemoval=true, mappedBy="accommodation", fetch=FetchType.EAGER)
    @Cascade(CascadeType.ALL)
    private Set<Restriction> restrictions;
    @ManyToOne(fetch=FetchType.EAGER)
    private Category category;
    @Override
    public String toString() {
        return "Name: "+name+"\n"+"Agent PIB: "+agent.toString()+"\n";
    }
}

字符串
下面是我的DTO对象：

package com.agent.module.dto;
import java.util.List;
import javax.xml.bind.annotation.XmlRootElement;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
@Getter @Setter @NoArgsConstructor
@XmlRootElement
public class AccommodationView {
    private Long id;
    private String location;
    private String typeName;
    private String description;
    private String name;
    private List<String> imagesPath;
    private Integer capacity;
    private List<String> additionalServicesName;
    private List<PricePlanView> pricePlan;
    private String agentUsername;
    private List<RestrictionView> restrictions;
    private String categoryName;
    @Override
    public String toString() {
        return "ID: "+id+"\n"+"Type: "+typeName+"\n"+"Description: "+description+"\n"+"Category: "+categoryName+"\n"+"Name: "+name+"\n";
    }
}

型
当我打开Postman并尝试从MySQL数据库中获取所有Accommodation对象时，我实际上想获取DTO对象，为了做到这一点，我使用了ModelMapper。但由于某种原因，每次我尝试将AccommodationMap到AccommodationView时，我都会得到返回。下面是我尝试执行Map的类：

@RestController
@RequestMapping(value = "/accommodation")
public class AccommodationController {
    @Autowired
    AccommodationRepo accommodationRepo;
    @Autowired 
    ModelMapper mapper;
    @RequestMapping(value="/all",
            method = RequestMethod.GET,
            produces = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    ResponseEntity<List<AccommodationView>> getAll(){
        List<Accommodation> accommodations = accommodationRepo.findAll();
        List<AccommodationView> accommodationViewList= new ArrayList<AccommodationView>();
        for(Accommodation accommodation : accommodations) {
            System.out.println(accommodation);
            System.out.println(convertToDto(accommodation));
            accommodationViewList.add(convertToDto(accommodation));
        }
        return new ResponseEntity<List<AccommodationView>>(accommodationViewList, HttpStatus.OK);
    }
    private AccommodationView convertToDto(Accommodation accommodation) {
        return mapper.map(accommodation, AccommodationView.class);
    }
    private Accommodation convertToEntity(AccommodationView accommodationView) {
        return mapper.map(accommodationView, Accommodation.class);
    }
}

型
下面是我在调用该方法时得到的输出：

Name: Test
Agent PIB: 2308995710368
ID: null
Type: null
Description: null
Category: null
Name: null

型
输出的第一部分来自Accommodation对象，输出的第二部分来自AccommodationView对象。如果有人知道发生了什么，我将非常感谢帮助。