官网：https://mapstruct.org/documentation/installation/
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct</artifactId>
<version>${mapstruct.version}</version>
</dependency>
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.66</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.10.6</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.10</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.30</version>
</dependency>
</dependencies>
dto
@Data
@ToString
public class PersonDto implements Serializable {
private Integer id;
private String nickName;
private String address;
private List<Bag> bagList;
private String cardNo;
private String birthdayStr;
private Date registerDate;
private Integer sex;
private List<String> foods;
private String phone;
private String buyStatus;
}entity
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Bag implements Serializable {
private String title;
private BigDecimal price;
private Date buyDate;
}
@Data
@ToString
public class Person implements Serializable {
private Integer id;
private String nickName;
private String address;
private List<Bag> bagList;
private String cardNum;
private Date birthdayDate;
private String registerStr;
private Integer gender;
private List<String> foods;
private Integer buyed;
}utils
@Slf4j
public class DateUtils {
public static final String TIME_ZONE = "GMT+8";
public static final String LUNA_DATE_TIME = "yyyy-MM-dd HH:mm:ss";
/**
* String(yyyy-MM-dd HH:mm:ss)格式日期转为Date
*
* @param str
* @return
* @throws ParseException
*/
public static Date parseDateTime(String str) throws ParseException {
return org.apache.commons.lang3.time.DateUtils.parseDate(str, new String[]{LUNA_DATE_TIME});
}
}
@Mapper
public interface PersonConvert {
PersonConvert PERSON_CONVERT = Mappers.getMapper(PersonConvert.class);
@Mappings({
//映射
@Mapping(source = "cardNum", target = "cardNo"),
//Date 格式化为 String
@Mapping(source = "birthdayDate", target = "birthdayStr", dateFormat = "yyyy-MM-dd"),
//String 格式化为 Date
@Mapping(target = "registerDate", expression = "java(com.luna.mapstruct.util.DateUtils.parseDateTime(person.getRegisterStr()))"),
//映射默认值
@Mapping(source = "gender", target = "sex", defaultValue = "1"),
//默认表达式
@Mapping(target = "foods", defaultExpression = "java(new java.util.ArrayList<>())"),
//映射常量值
@Mapping(target = "phone", constant = "123@qq.com")
})
PersonDto convertDto(Person person) throws Exception;
/**
* 将在转换执行
* @param person
* @param personDto
*/
@AfterMapping
default void convertBuyed(Person person, @MappingTarget PersonDto personDto) {
if (person.getBuyed() != null && person.getBuyed() == 1) {
personDto.setBuyStatus("已购");
}
}
/**
* 列表转换
* @param peopleList
* @return
*/
List<PersonDto> convertListDto(List<Person> peopleList);
// @InheritConfiguration
//取消默认转换，仅指定哪些字段映射
@BeanMapping(ignoreByDefault = true)
@Mappings({
@Mapping(source = "id",target = "id")
})
PersonDto update(Person person, @MappingTarget PersonDto personDTO)throws Exception;
}
Test
public class AppTest {
@Test
public void testMapstruct() throws Exception {
// testDto();
// testListDto();
testCustomDto();
}
public void testDto() throws Exception {
Person person = new Person();
person.setId(1);
person.setNickName("张三");
person.setAddress("杭州");
person.setCardNum("123");
person.setBirthdayDate(new Date());
person.setRegisterStr("2022-01-01 12:00:00");
List<Bag> list = new ArrayList<>();
list.add(new Bag("红色", BigDecimal.valueOf(1), new Date()));
list.add(new Bag("黑色", BigDecimal.valueOf(2), new Date()));
person.setBagList(list);
person.setBuyed(1);
PersonDto personDto =
PersonConvert.PERSON_CONVERT.convertDto(person);
System.out.println(JSON.toJSONString(personDto));
person.setNickName("李四");
PersonDto update = PersonConvert.PERSON_CONVERT.update(person, personDto);
System.out.println(JSON.toJSONString(update));
}
/**
* 自定义转换
* @throws Exception
*/
public void testCustomDto() throws Exception {
Person person = new Person();
person.setId(1);
// person.setNickName("张三");
// person.setAddress("杭州");
// person.setCardNum("123");
person.setBirthdayDate(new Date());
person.setRegisterStr("2022-01-01 12:00:00");
PersonDto personDto =
PersonConvert.PERSON_CONVERT.update(person,new PersonDto());
System.out.println(JSON.toJSONString(personDto));
}
public void testListDto() {
Person person = new Person();
person.setId(1);
person.setNickName("张三");
person.setAddress("杭州");
person.setCardNum("123");
person.setBirthdayDate(new Date());
person.setRegisterStr("2022-01-01 12:00:00");
List<Bag> list = new ArrayList<>();
list.add(new Bag("红色", BigDecimal.valueOf(1), new Date()));
list.add(new Bag("黑色", BigDecimal.valueOf(2), new Date()));
person.setBagList(list);
List<PersonDto> personDtoList =
PersonConvert.PERSON_CONVERT.convertListDto(Arrays.asList(person));
System.out.println(JSON.toJSONString(personDtoList));
}
}
