springboot mapstruct

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官方例子

POM

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
<!--        -->
<!--        <version>2.5.15</version>-->
    </parent>

    <groupId>my.boot.test</groupId>
    <artifactId>my-boot-test</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>


    <dependencies>

  <!--      <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <scope>test</scope>
        </dependency>-->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <!--<version>1.16.20</version>-->
            <version>1.18.16</version>
            <scope>provided</scope>
        </dependency>

        <!-- swagger2 -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.9.2</version>
        </dependency>

        <!-- mapstruct -->
        <dependency>
            <groupId>org.mapstruct</groupId>
            <artifactId>mapstruct</artifactId>
            <version>1.5.5.Final</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok-mapstruct-binding</artifactId>
            <version>0.2.0</version>
        </dependency>

        <dependency>
            <groupId>org.mapstruct</groupId>
            <artifactId>mapstruct-processor</artifactId>
            <version>1.5.5.Final</version>
            <!--provided表明该包只在编译和测试的时候用-->
            <scope>provided</scope>
        </dependency>


        <!-- spring-test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-json</artifactId>
            <version>5.8.25</version>
        </dependency>


    </dependencies>


    <build>
        <finalName>${project.artifactId}-8081</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.boot.test.Application</mainClass>
                </configuration>
            </plugin>

        </plugins>
    </build>


</project>

DTO

AaDTO

import lombok.Data;
import java.math.BigDecimal;
import java.util.Date;
import java.util.List;
import java.util.Map;

@Data
public class AaDTO {
   

    private String str;
    private  Integer intObjNum;
    private  int intNum;
    private Date dateJUtil;
    private List<String> listStr;
    private Map<String,String> map;
    private BigDecimal bigDecimal;

    private String strA;
    private  Integer intObjNumA;
    private  int intNumA;
    private Date dateJUtilA;
    private List<String> listStrA;
    private Map<String,String> mapA;
    private BigDecimal bigDecimalA;
}

BbDTO

import lombok.Data;
import java.math.BigDecimal;
import java.util.Date;
import java.util.List;
import java.util.Map;

@Data
public class BbDTO {
   
    private String str;
    private  Integer intObjNum;
    private  int intNum;
    private Date dateJUtil;
    private List<String> listStr;
    private Map<String,String> map;
    private BigDecimal bigDecimal;
}

CcDTO

import lombok.Data;
import java.math.BigDecimal;

@Data
public class CcDTO {
   
    private BigDecimal bigDecimal;
    private String nowDateStr;
}

DdDTO

import lombok.Data;

@Data
public class DdDTO {
   
    private String s1;
    private String s2;
    private String s3;
    private String s4;
}

VO

import lombok.Data;

import java.math.BigDecimal;
import java.util.Date;
import java.util.List;
import java.util.Map;

@Data
public class AaaVO {
   
    private String str;
    private  Integer intObjNum;
    private  int intNum;
    private Date dateJUtil;
    private String dateJUtilStr;
    private List<String> listStr;
    private Map<String,String> map;
    private BigDecimal bigDecimal;

    private String nowDateStr;
    private String intObjNumStr;
}

mapstruct 配置

import cn.hutool.core.util.IdUtil;
import com.boot.test.dto.AaDTO;
import com.boot.test.dto.CcDTO;
import com.boot.test.dto.DdDTO;
import com.boot.test.mapstruct.annotation.ToVO;
import com.boot.test.vo.AaaVO;
import org.mapstruct.*;

import java.math.BigDecimal;
import java.util.List;
import java.util.Map;

@Mapper(componentModel="spring",unmappedTargetPolicy = ReportingPolicy.IGNORE
       ,imports = {
   cn.hutool.core.util.RandomUtil.class, IdUtil.class})
public interface MapStructConvertSpring {
   



    /**
     * Mapping注解的参数解释：
     *      1、source：源属性名称，即DTO类下的属性名称
     *      2、target：目标属性名称，即VO类下的属性名称
     *      https://mapstruct.org/documentation/stable/reference/html/#datatype-conversions
     *
     *      before Java 8,需要用@Mappings包裹多个@Mapping
     */
    @ToVO
    @Mapping(target = "intNum", ignore = true)
    @Mapping(target = "intObjNumStr",source = "intNum", numberFormat = "$#.00")
    @Mapping(target = "dateJUtilStr",source = "dateJUtil", dateFormat = "yyyy-MM-dd HH:mm:ss")
    AaaVO AaDTO2VO(AaDTO aaDTO);


    default AaaVO toDIY(AaDTO dto){
   
        AaaVO vo = new AaaVO();
        vo.setStr("toDIY + " +dto.getStr());
        return vo;
    }

//    会把DTO里相同字段都转换到VO里
    @Mapping(target = "intObjNum", ignore = true)
    @Mapping(target = "str",source = "a.str")
    @Mapping(target = "bigDecimal",source = "c.bigDecimal")
    @Mapping(target = "intNum", source = "nn") //约定大于默认
    AaaVO AaBbDTO2VO(AaDTO a , CcDTO c,Integer nn);


//    不成功
    @Mapping( target = ".", source = "str" )
    DdDTO default2VO(AaDTO dto);

    void updateVO( AaDTO dto,@MappingTarget AaaVO vo);


    @Mapping(target = "s1", source = "mk1")
    DdDTO mapToDTO(Map<String, String> map);

    @IterableMapping(numberFormat = "$#.00")
    List<String> prices(List<BigDecimal> prices);

    @InheritInverseConfiguration
    List<BigDecimal>  pricesInverse(List<String> ll );



    @BeforeMapping
    default void before(){
   
        System.out.println("默认的前置转换...");
    }
    @BeforeMapping
    default void before(List<BigDecimal> prices,@MappingTarget List<String> ll){
   
        System.out.println("prices的前置转换...");
    }

    @AfterMapping
    default void after(){
   
        System.out.println("默认的后置转换...");
    }

    @AfterMapping
    default void after(List<BigDecimal> prices,@MappingTarget List<String> ll){
   
        System.out.println("prices的后置转换...");
    }


    @Mapping(target = "nowDateStr", source = "a.strA" ,defaultExpression = "java(IdUtil.fastSimpleUUID())")
    @Mapping(target = "intObjNum", source = "nn")
    @Mapping(target = "str",expression  = "java(RandomUtil.randomString(a.getIntObjNum()) )")
    AaaVO randomAaDTO2VO(AaDTO a,Integer nn);

}

springtest

import cn.hutool.core.date.DateUtil;
import cn.hutool.json.JSONUtil;
import com.boot.test.dto.AaDTO;
import com.boot.test.dto.BbDTO;
import com.boot.test.dto.CcDTO;
import com.boot.test.dto.DdDTO;
import com.boot.test.mapstruct.MapStructConvertSpring;
import com.boot.test.vo.AaaVO;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.math.BigDecimal;
import java.util.*;

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
//SpringBoot2.2.0之前的版本 要加 @RunWith
@RunWith(SpringRunner.class)
public class AaaTestService {
   

    @Autowired
    private MapStructConvertSpring convertSpring;

    AaDTO genAa(){
   
        AaDTO dto = new AaDTO();
        dto.setStr("strtttAAAAAAAA");
        dto.setIntObjNum(Integer.valueOf(111));
        dto.setIntNum(2222);
        dto.setDateJUtil(DateUtil.date());
        List<String> ll = new ArrayList<>();
        ll.add("a1");
        ll.add("a2");
        ll.add("a3");
        dto.setListStr(ll);
        Map<String,String> map =new HashMap<>();
        map.put("mk1","mv1");
        map.put("mk2","mv2");
        map.put("mk3","mv3");
        dto.setMap(map);
        dto.setBigDecimal(new BigDecimal("33.44"));
        return dto;
    }

    BbDTO genBb(){
   
        BbDTO dto = new BbDTO();
        dto.setStr("strtttBBBBBB");
        dto.setIntObjNum(Integer.valueOf(999));
        dto.setIntNum(888);
        dto.setListStr(Arrays.asList("b1","b2","b3"));
        dto.setBigDecimal(new BigDecimal("99.88"));
        return dto;
    }

    CcDTO genCc(){
   
        CcDTO dto = new CcDTO();
        dto.setBigDecimal(new BigDecimal("44.55"));
        dto.setNowDateStr("fsdgdfgdfgfd");
        return dto;
    }

//    要经常clean

    @Test
    public void AaDtoV(){
   
        AaaVO vo = convertSpring.AaDTO2VO(genAa());
        System.out.println(JSONUtil.toJsonStr(vo));
    }

    @Test
    public void AaDtoVDIY(){
   
        AaaVO vo = convertSpring.toDIY(genAa());
        System.out.println(JSONUtil.toJsonStr(vo));
    }

    @Test
    public void AaBbDTO2VO(){
   
        AaaVO vo = convertSpring.AaBbDTO2VO(genAa(),genCc(),888888);
        System.out.println(JSONUtil.toJsonStr(vo));
//        {"str":"strtttAAAAAAAA","intNum":2222,"dateJUtil":1706517743088,"listStr":["a1","a2","a3"],"map":{"mk1":"mv1","mk3":"mv3","mk2":"mv2"},"bigDecimal":44.55,"nowDateStr":"fsdgdfgdfgfd"}
    }

    @Test
    public void default2VO(){
   
        DdDTO ddDTO = convertSpring.default2VO(genAa());
        System.out.println(JSONUtil.toJsonStr(ddDTO));
    }

    @Test
    public void updateVO(){
   
        AaaVO vo = new AaaVO();
        convertSpring.updateVO(genAa(),vo);
        System.out.println(JSONUtil.toJsonStr(vo));
    }


    @Test
    public void mapToDTO(){
   
        Map<String,String> map =new HashMap<>();
        map.put("mk1","mv1");
        map.put("mk2","mv2");
        map.put("mk3","mv3");
        DdDTO dto = convertSpring.mapToDTO(map);
        System.out.println(JSONUtil.toJsonStr(dto));
    }

    @Test
    public void prices(){
   
        List<BigDecimal> ll= new ArrayList<>();
        ll.add(new BigDecimal("11.22"));
        ll.add(new BigDecimal("33.44"));
        ll.add(new BigDecimal("55.66"));
        ll.add(new BigDecimal("77.88"));
        List<String> prices = convertSpring.prices(ll);
        System.out.println(JSONUtil.toJsonStr(prices));
    }
    @Test
    public void pricesInverse(){
   
        List<BigDecimal> bigDecimals = convertSpring.pricesInverse(Arrays.asList("$3.44","$5.66","$7.88"));
        System.out.println(JSONUtil.toJsonStr(bigDecimals));
    }

    @Test
    public void randomAaDTO2VO(){
   
        AaaVO vo = convertSpring.randomAaDTO2VO(genAa(),8);
        System.out.println(JSONUtil.toJsonStr(vo));

    }
}
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