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springboot優點，MapStruct入門及集成springboot

 2023-11-19 阅读 39 评论 0

摘要：MapStruct入門及集成springboot MapStruct官網地址： http://mapstruct.org/ 1、引入依賴 maven的pom.xml ... <properties><org.mapstruct.version>1.4.2.Final</org.mapstruct.version> </properties> ... <dependencies><dependenc

MapStruct入門及集成springboot

MapStruct官網地址： http://mapstruct.org/

1、引入依賴

maven的pom.xml

...
<properties><org.mapstruct.version>1.4.2.Final</org.mapstruct.version>
</properties>
...
<dependencies><dependency><groupId>org.mapstruct</groupId><artifactId>mapstruct</artifactId><version>${org.mapstruct.version}</version></dependency>
</dependencies>
...
<build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.8.1</version><configuration><source>1.8</source> <!-- depending on your project --><target>1.8</target> <!-- depending on your project --><annotationProcessorPaths><path><groupId>org.mapstruct</groupId><artifactId>mapstruct-processor</artifactId><version>${org.mapstruct.version}</version></path><!-- other annotation processors --></annotationProcessorPaths></configuration></plugin></plugins>
</build>

springboot優點，或

<properties><org.mapstruct.version>1.4.2.Final</org.mapstruct.version>
</properties><dependency><groupId>org.mapstruct</groupId><artifactId>mapstruct</artifactId><version>${org.mapstruct.version}</version>
</dependency><dependency><groupId>org.mapstruct</groupId><artifactId>mapstruct-processor</artifactId><version>${org.mapstruct.version}</version>
</dependency>

2、簡單示例

2.1 新增實體

admin 實體：

public class Admin {private String name;private String address;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}
}

user實體：

public class User {private String name;private String address;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}
}

2.2 定義mapper

Java map、mapper:

import org.mapstruct.Mapper;
import org.mapstruct.factory.Mappers;@Mapper
public interface UserMapper {UserMapper INSTANCE  = Mappers.getMapper(UserMapper.class);Admin userToAdmin(User user);
}

2.3 測試效果

測試demo：

public static void main(String[] args) {User user = new User();user.setAddress("213");user.setName("張三");Admin admin = UserMapper.INSTANCE.userToAdmin(user);System.out.println(admin.getAddress());System.out.println(admin.getName());}

結果：

213
張三

3、多個入參構造一個對象

3.1 新增實體

springboot？Role:

public class Role {private String name;private String roleId;private String description;public Role() {}public Role(String name, String roleId, String description) {this.name = name;this.roleId = roleId;this.description = description;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getRoleId() {return roleId;}public void setRoleId(String roleId) {this.roleId = roleId;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}
}

User:

public class User {private Long userId;private String name;private String address;public User() {}public User(Long userId, String name, String address) {this.userId = userId;this.name = name;this.address = address;}public Long getUserId() {return userId;}public void setUserId(Long userId) {this.userId = userId;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}
}

UserRoleDTO:

public class UserRoleDTO {private Long id;private String name;private String address;private String roleName;private String roleId;private String description;public Long getId() {return id;}public void setId(Long id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public String getRoleName() {return roleName;}public void setRoleName(String roleName) {this.roleName = roleName;}public String getRoleId() {return roleId;}public void setRoleId(String roleId) {this.roleId = roleId;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}@Overridepublic String toString() {return "UserRoleDTO{" +"id=" + id +", name='" + name + '\'' +", address='" + address + '\'' +", roleName='" + roleName + '\'' +", roleId='" + roleId + '\'' +", description='" + description + '\'' +'}';}

3.2 定義mapper

springboot集成html，mapper:

import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import org.mapstruct.Mappings;
import org.mapstruct.factory.Mappers;@Mapper
public interface UserMapper {UserMapper INSTANCE  = Mappers.getMapper(UserMapper.class);@Mappings({//user中的userId綁定到目標對象的id屬性中@Mapping(source = "user.userId", target = "id"),//user和 role中都有name屬性，所以需要指定一個來傳給UserRoleDto@Mapping(source = "user.name",target = "name")})UserRoleDTO toUserRoleDTO(User user, Role role);
}

3.3 測試效果

測試demo：

public static void main(String[] args) {User user = new User(1L, "小王八蛋", "北京");Role role = new Role("管理員", "2", "描述");UserRoleDTO userRoleDTO = UserMapper.INSTANCE.toUserRoleDTO(user, role);System.out.println(userRoleDTO.toString());}

結果：

UserRoleDTO{id=1, name='小王八蛋', address='北京', roleName='null', roleId='2', description='描述'}

4、數據類型轉換 （int -> string 等）

4.1 新增實體

product：

import java.util.Date;public class Product {private int price;private int stock;private Date saleTime;private Date validTime;public Product() {}public Product(int price, int stock, Date saleTime, Date validTime) {this.price = price;this.stock = stock;this.saleTime = saleTime;this.validTime = validTime;}public int getPrice() {return price;}public void setPrice(int price) {this.price = price;}public int getStock() {return stock;}public void setStock(int stock) {this.stock = stock;}public Date getSaleTime() {return saleTime;}public void setSaleTime(Date saleTime) {this.saleTime = saleTime;}public Date getValidTime() {return validTime;}public void setValidTime(Date validTime) {this.validTime = validTime;}
}

productDTO:

public class ProductDTO {private String price;private String stock;private String saleTime;private String  validTime;@Overridepublic String toString() {return "ProductDTO{" +"price='" + price + '\'' +", stock='" + stock + '\'' +", saleTime='" + saleTime + '\'' +", validTime='" + validTime + '\'' +'}';}public String getPrice() {return price;}public void setPrice(String price) {this.price = price;}public String getStock() {return stock;}public void setStock(String stock) {this.stock = stock;}public String getSaleTime() {return saleTime;}public void setSaleTime(String saleTime) {this.saleTime = saleTime;}public String getValidTime() {return validTime;}public void setValidTime(String validTime) {this.validTime = validTime;}
}

4.2 定義mapper

mapper:

import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import org.mapstruct.Mappings;
import org.mapstruct.factory.Mappers;@Mapper
public interface ProductMapper {ProductMapper INSTANCE = Mappers.getMapper(ProductMapper.class);/*** numberFormat 指定基本數據類型與String之間的轉換* dateFormat 指定Date和String之間的轉換*/@Mappings({// 這里 # 表示多個數字，  0 表示一個數字（0-9）@Mapping(source = "price", target = "price", numberFormat = "#.00元"),@Mapping(source = "stock", target = "stock", numberFormat = "#個"),@Mapping(target = "saleTime", dateFormat = "yyyy-MM-dd HH:mm:ss"),@Mapping(target = "validTime", dateFormat = "yyyy-MM-dd HH:mm")})ProductDTO toDto(Product product);;
}

4.3 測試效果

測試demo：

 public static void main(String[] args) {Product product = new Product(1,1,new Date(),new Date());ProductDTO productDTO = ProductMapper.INSTANCE.toDto(product);System.out.println(productDTO.toString());}

結果：

ProductDTO{price='1.00元', stock='1個', saleTime='2022-02-28 17:39:29', validTime='2022-02-28 17:39'}

5、包含其他類的映射

5.1 相同類

5.1.1 新增實體

user:

public class User {private Long userId;private String name;private String address;private Role role;public User() {}public Role getRole() {return role;}public void setRole(Role role) {this.role = role;}public User(Long userId, String name, String address) {this.userId = userId;this.name = name;this.address = address;}public Long getUserId() {return userId;}public void setUserId(Long userId) {this.userId = userId;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}
}

role:

public class Role {private String name;private String roleId;private String description;public Role() {}public Role(String name, String roleId, String description) {this.name = name;this.roleId = roleId;this.description = description;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getRoleId() {return roleId;}public void setRoleId(String roleId) {this.roleId = roleId;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}@Overridepublic String toString() {return "Role{" +"name='" + name + '\'' +", roleId='" + roleId + '\'' +", description='" + description + '\'' +'}';}
}

UserRoleDTO:

public class UserRoleDTO {private Long id;private String name;private String address;private String roleName;private String roleId;private String description;private Role role;public Role getRole() {return role;}public void setRole(Role role) {this.role = role;}public Long getId() {return id;}public void setId(Long id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public String getRoleName() {return roleName;}public void setRoleName(String roleName) {this.roleName = roleName;}public String getRoleId() {return roleId;}public void setRoleId(String roleId) {this.roleId = roleId;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}@Overridepublic String toString() {return "UserRoleDTO{" +"id=" + id +", name='" + name + '\'' +", address='" + address + '\'' +", roleName='" + roleName + '\'' +", roleId='" + roleId + '\'' +", description='" + description + '\'' +", role=" + role +'}';}
}

5.1.2 定義mapper

mapper:

import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import org.mapstruct.factory.Mappers;@Mapper
public interface UserMapper {UserMapper INSTANCE  = Mappers.getMapper(UserMapper.class);// role 的屬性名一樣，類型也一樣，不用寫Mapping，還有就是 role的賦值是淺拷貝 只拷貝引用，不生成新的對象@Mapping(source = "userId", target = "id")// 把user中的userId綁定到目標對象的id屬性中UserRoleDTO toUserRoleDto(User user);}

5.1.3 測試效果

測試demo：

 public static void main(String[] args) {User user = new User(1L, "小王八蛋", "北京");Role role = new Role("管理員", "2", "描述");user.setRole(role);UserRoleDTO userRoleDTO = UserMapper.INSTANCE.toUserRoleDto(user);System.out.println(userRoleDTO.toString());}

結果：

UserRoleDTO{id=1, name='小王八蛋', address='北京', roleName='null', roleId='null', description='null', role=Role{name='管理員', roleId='2', description='描述'}}

5.2 不同類

5.2.1 新增實體

user:

public class User {private Long userId;private String name;private String address;private Role role;public User() {}public Role getRole() {return role;}public void setRole(Role role) {this.role = role;}public User(Long userId, String name, String address) {this.userId = userId;this.name = name;this.address = address;}public Long getUserId() {return userId;}public void setUserId(Long userId) {this.userId = userId;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}
}

role:

public class Role {private String name;private String roleId;private String description;public Role() {}public Role(String name, String roleId, String description) {this.name = name;this.roleId = roleId;this.description = description;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getRoleId() {return roleId;}public void setRoleId(String roleId) {this.roleId = roleId;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}@Overridepublic String toString() {return "Role{" +"name='" + name + '\'' +", roleId='" + roleId + '\'' +", description='" + description + '\'' +'}';}
}

UserRoleDTO:

public class UserRoleDTO {private Long id;private String name;private String address;private String roleName;private String roleId;private String description;private RoleDTO role;public RoleDTO getRole() {return role;}public void setRole(RoleDTO role) {this.role = role;}public Long getId() {return id;}public void setId(Long id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public String getRoleName() {return roleName;}public void setRoleName(String roleName) {this.roleName = roleName;}public String getRoleId() {return roleId;}public void setRoleId(String roleId) {this.roleId = roleId;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}@Overridepublic String toString() {return "UserRoleDTO{" +"id=" + id +", name='" + name + '\'' +", address='" + address + '\'' +", roleName='" + roleName + '\'' +", roleId='" + roleId + '\'' +", description='" + description + '\'' +", role=" + role +'}';}
}

RoleDTO:

public class RoleDTO {private String name;private String id;private String description;public RoleDTO(String name, String id, String description) {this.name = name;this.id = id;this.description = description;}public RoleDTO() {}@Overridepublic String toString() {return "RoleDTO{" +"name='" + name + '\'' +", id='" + id + '\'' +", description='" + description + '\'' +'}';}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getId() {return id;}public void setId(String id) {this.id = id;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}
}

5.2.2 定義mapper

mapper:

import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import org.mapstruct.factory.Mappers;@Mapper
public interface UserMapper {UserMapper INSTANCE  = Mappers.getMapper(UserMapper.class);// 這兩個方法寫在一起也行，分別寫在兩個接口里也行，執行時，都會自動調用@Mapping(source = "userId", target = "id") // 把user中的userId綁定到目標對象的id屬性中UserRoleDTO toUserRoleDto(User user);// 當上面那個toUserRoleDto方法調用時，會自動調用這個方法來完成 User類中的Role 到 UserRoleDTO類中的RoleDTO  的轉換@Mapping(source = "roleId", target = "id")RoleDTO toRoleDto(Role role);}

5.2.3 測試效果

測試demo：

 public static void main(String[] args) {Product product = new Product(1,1,new Date(),new Date());ProductDTO productDTO = ProductMapper.INSTANCE.toDto(product);System.out.println(productDTO.toString());}

結果：

UserRoleDTO{id=1, name='小王八蛋', address='北京', roleName='null', roleId='null', description='null', role=RoleDTO{name='管理員', id='2', description='描述'}}

6、自定義映射方式

6.1 新增實體

product:

import java.util.Date;public class Product {private int price;private int stock;private Date saleTime;private Date validTime;private Boolean isDone;public Product() {}public Product(int price, int stock, Date saleTime, Date validTime, Boolean isDone) {this.price = price;this.stock = stock;this.saleTime = saleTime;this.validTime = validTime;this.isDone = isDone;}public Boolean getIsDone() {return isDone;}public void setIsDone(Boolean done) {isDone = done;}public int getPrice() {return price;}public void setPrice(int price) {this.price = price;}public int getStock() {return stock;}public void setStock(int stock) {this.stock = stock;}public Date getSaleTime() {return saleTime;}public void setSaleTime(Date saleTime) {this.saleTime = saleTime;}public Date getValidTime() {return validTime;}public void setValidTime(Date validTime) {this.validTime = validTime;}
}

productDTO:

public class ProductDTO {private String price;private String stock;private String saleTime;private String validTime;private String isDone;@Overridepublic String toString() {return "ProductDTO{" +"price='" + price + '\'' +", stock='" + stock + '\'' +", saleTime='" + saleTime + '\'' +", validTime='" + validTime + '\'' +", isDone='" + isDone + '\'' +'}';}public String getIsDone() {return isDone;}public void setIsDone(String isDone) {this.isDone = isDone;}public String getPrice() {return price;}public void setPrice(String price) {this.price = price;}public String getStock() {return stock;}public void setStock(String stock) {this.stock = stock;}public String getSaleTime() {return saleTime;}public void setSaleTime(String saleTime) {this.saleTime = saleTime;}public String getValidTime() {return validTime;}public void setValidTime(String validTime) {this.validTime = validTime;}
}

6.2 自定義映射

自定義：

import org.mapstruct.Named;@Named("DoneFormater")
public class DoneFormater {@Named("DoneFormater")public String toStr(Boolean isDone) {if (isDone) {return "已完成";} else {return "未完成";}}@Named("DoneDetailFormater")public String toDetail(Boolean isDone) {if (isDone) {return "該產品已完成";} else {return "該產品未完成";}}public Boolean toBoolean(String str) {if (str.equals("已完成")) {return true;} else {return false;}}}

6.3 定義mapper

mapper:

import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import org.mapstruct.Mappings;
import org.mapstruct.factory.Mappers;// 通過uses 來導入上面我們寫的 自定義映射方法
@Mapper( uses = {DoneFormater.class})
public interface ProductMapper {ProductMapper INSTANCE = Mappers.getMapper(ProductMapper.class);/*** numberFormat 指定基本數據類型與String之間的轉換* dateFormat 指定Date和String之間的轉換*/@Mappings({// 這里 # 表示多個數字，  0 表示一個數字（0-9）@Mapping(source = "price", target = "price", numberFormat = "#.00元"),@Mapping(source = "stock", target = "stock", numberFormat = "#個"),@Mapping(target = "saleTime", dateFormat = "yyyy-MM-dd HH:mm:ss"),@Mapping(target = "validTime", dateFormat = "yyyy-MM-dd HH:mm"),// 當有多個方法 擁有一樣的參數和返回類型時，需要指定使用其中的哪一個，使用qualifiedByName指定@Mapping(source = "isDone", target = "isDone", qualifiedByName = "DoneDetailFormater")})ProductDTO toDto(Product product);;
}

6.4 測試效果

測試demo:

public static void main(String[] args) {Product product = new Product(1,1,new Date(),new Date(),true);ProductDTO productDTO = ProductMapper.INSTANCE.toDto(product);System.out.println(productDTO.toString());}

效果：

ProductDTO{price='1.00元', stock='1個', saleTime='2022-02-28 22:18:25', validTime='2022-02-28 22:18', isDone='該產品已完成'}

7、 List映射

7.1 新增實體

product:

import java.util.Date;public class Product {private int price;private int stock;private Date saleTime;private Date validTime;private Boolean isDone;public Product() {}public Product(int price, int stock, Date saleTime, Date validTime, Boolean isDone) {this.price = price;this.stock = stock;this.saleTime = saleTime;this.validTime = validTime;this.isDone = isDone;}public Boolean getIsDone() {return isDone;}public void setIsDone(Boolean done) {isDone = done;}public int getPrice() {return price;}public void setPrice(int price) {this.price = price;}public int getStock() {return stock;}public void setStock(int stock) {this.stock = stock;}public Date getSaleTime() {return saleTime;}public void setSaleTime(Date saleTime) {this.saleTime = saleTime;}public Date getValidTime() {return validTime;}public void setValidTime(Date validTime) {this.validTime = validTime;}
}

productDTO:

public class ProductDTO {private String price;private String stock;private String saleTime;private String validTime;private String isDone;@Overridepublic String toString() {return "ProductDTO{" +"price='" + price + '\'' +", stock='" + stock + '\'' +", saleTime='" + saleTime + '\'' +", validTime='" + validTime + '\'' +", isDone='" + isDone + '\'' +'}';}public String getIsDone() {return isDone;}public void setIsDone(String isDone) {this.isDone = isDone;}public String getPrice() {return price;}public void setPrice(String price) {this.price = price;}public String getStock() {return stock;}public void setStock(String stock) {this.stock = stock;}public String getSaleTime() {return saleTime;}public void setSaleTime(String saleTime) {this.saleTime = saleTime;}public String getValidTime() {return validTime;}public void setValidTime(String validTime) {this.validTime = validTime;}
}

7.2 定義mapper

mapper:

import org.mapstruct.Mapper;
import org.mapstruct.Mapping;
import org.mapstruct.Mappings;
import org.mapstruct.factory.Mappers;import java.util.List;// 通過uses 來導入上面我們寫的 自定義映射方法
@Mapper( uses = {DoneFormater.class})
public interface ProductMapper {ProductMapper INSTANCE = Mappers.getMapper(ProductMapper.class);/*** numberFormat 指定基本數據類型與String之間的轉換* dateFormat 指定Date和String之間的轉換*/@Mappings({// 這里 # 表示多個數字，  0 表示一個數字（0-9）@Mapping(source = "price", target = "price", numberFormat = "#.00元"),@Mapping(source = "stock", target = "stock", numberFormat = "#個"),@Mapping(target = "saleTime", dateFormat = "yyyy-MM-dd HH:mm:ss"),@Mapping(target = "validTime", dateFormat = "yyyy-MM-dd HH:mm"),// 當有多個方法 擁有一樣的參數和返回類型時，需要指定使用其中的哪一個，使用qualifiedByName指定@Mapping(source = "isDone", target = "isDone", qualifiedByName = "DoneDetailFormater")})ProductDTO toDto(Product product);// 	當執行 下面這個List的轉換時，會遍歷list: product，//  然后自動調用上面的Product轉ProductDTO的轉換方法，來進行轉換List<ProductDTO> toList(List<Product> productList);
}

7.3 測試效果

測試demo:

public static void main(String[] args) {Product product = new Product(1,1,new Date(),new Date(),true);List<Product> list = new ArrayList<>();list.add(product);List<ProductDTO> productDTOS = ProductMapper.INSTANCE.toList(list);productDTOS.stream().forEach(productDTO -> System.out.println(productDTO.toString()));}

結果：

ProductDTO{price='1.00元', stock='1個', saleTime='2022-02-28 22:29:42', validTime='2022-02-28 22:29', isDone='該產品已完成'}

8、Map映射

8.1 定義mapper

import org.mapstruct.MapMapping;
import org.mapstruct.Mapper;
import org.mapstruct.factory.Mappers;import java.util.Date;
import java.util.Map;@Mapper
public interface MapMapper {MapMapper INSTANCE = Mappers.getMapper(MapMapper.class);@MapMapping(valueDateFormat = "yyyy-MM-dd HH:mm:ss")Map<String, String> toDTO(Map<Long, Date> map);}

8.2 測試效果

測試demo:

public static void main(String[] args) {Map<Long,Date> param = new HashMap<>();param.put(1L,new Date());Map<String, String> stringStringMap = MapMapper.INSTANCE.toDTO(param);for (Map.Entry<String, String> stringStringEntry : stringStringMap.entrySet()) {System.out.println(stringStringEntry.getKey());System.out.println(stringStringEntry.getValue());}}

結果：

1
2022-02-28 22:39:07

9、枚舉映射

9.1 新增枚舉

9.2 定義mapper

9.3 測試效果

10、使用表達式和默認值

10.1 定義mapper

// 通過uses 來導入上面我們寫的 自定義映射方法
@Mapper( uses = {DoneFormater.class})
public interface ProductMapper {ProductMapper INSTANCE = Mappers.getMapper(ProductMapper.class);//expression中可以直接寫Java代碼@Mappings({// 設置默認值@Mapping(target = "productId", source = "productId", defaultValue = "123"), //當product的productId為null，設置為0// 表達式@Mapping(target = "price", expression = "java(product.getPrice1() + product.getPrice2())"),//直接相加@Mapping(target = "price2", expression = "java(MathUtils.addAndReturn0(product.getPrice1(), product.getPrice2()))"),//使用工具類處理// 常量@Mapping(target = "stock", constant = "100"), //固定設置為100, 常量})ProductDTO toDTO(Product product);
}

11、典型例子：

@Data
@AllArgsConstructor
@NoArgsConstructor
public class RespLoginDTO {private String id;private String username;private String cname;private String sex;private String mobile;private String email;private String token;private String description;private String roleName;private String roleId;private List<menusbean> menus;@Data@AllArgsConstructor@NoArgsConstructorpublic static class MenusBean {private int id;private String title;private String icon;private List<childrenbean> children;@Data@AllArgsConstructor@NoArgsConstructorpublic static class ChildrenBean {private int id;private String title;private String path;}}
}
@Mapper(componentModel = "spring")
public interface RespLoginDtoConverter {RespLoginDtoConverter INSTANCE = Mappers.getMapper(RespLoginDtoConverter.class);@Mappings({@Mapping(source = "user.userId", target = "id"),@Mapping(source = "userPerms", target = "menus")})RespLoginDTO createRespLoginDTO(User user, Role role, List<userperm> userPerms, String token);// 下面的幾個方法都是為了輔組完成上面的那個createRespLoginDTO轉換而寫的List<resplogindto.menusbean> createMenusBeans(List<userperm> userPerms);@Mappings({@Mapping(source = "mainPerm.permId", target = "id"),@Mapping(source = "mainPerm.permTitle", target = "title"),@Mapping(source = "mainPerm.permIcon", target = "icon"),@Mapping(source = "childrenPrem", target = "children")//@Mapping(source = "userPerms.mainPerm", target = "menus"),})RespLoginDTO.MenusBean createMenusBean(UserPerm userPerm);List<resplogindto.menusbean.childrenbean> createMenusBeanChildrenBeans(List<perm> perms);@Mappings({@Mapping(source = "permId", target = "id"),@Mapping(source = "permTitle", target = "title"),@Mapping(source = "permPath", target = "path")//@Mapping(source = "userPerms.mainPerm", target = "menus"),})RespLoginDTO.MenusBean.ChildrenBean createChildrenBean(Perm perm);}
@Data
@AllArgsConstructor
@NoArgsConstructor
public class UserPerm {/*** 主權限*/private Perm mainPerm;/*** 子權限*/private List<perm> childrenPrem;
}
@Data
@EqualsAndHashCode(callSuper = false)
public class Perm implements Serializable {private static final long serialVersionUID = 1L;private Long permId;private Long parentId;private String permCode;private String permName;private LocalDateTime createDate;private String permPath;private String permTitle;private String permIcon;private Boolean permType;
}

參考：https://www.cnblogs.com/vb-ahh/p/14836453.html

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