本文主要是介绍对象转换之modelmapper，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
1. 官网地址：http://modelmapper.org
源码地址：GitHub - modelmapper/modelmapper: Intelligent object mapping
2.实现原理：
主要是基于匹配策略进行属性的转化，目前支持三种策略：
2.1 Standard（默认标准规则）
2.2 Loose 松散型
2.3 Strict 严格匹配
3.实战：
这里我们以springboot集成案例演示，
方式一：Spring Boot Devtools+modelmapper
配置文件增加（需要集成springboot devtools）
restart.include.modelmapper=/modelmapper-(.*).jar方式二： maven包
<dependency><groupId>org.modelmapper</groupId><artifactId>modelmapper</artifactId><version>3.1.1</version>
</dependency>3.1 属性映射
3.2 类型映射继承
3.3 校验
3.4 配置
3.5 转化映射
3.6 Provider
3.7 通用
附demo:
public class Game {Address address;public Address getAddress() {return address;}public void setAddress(Address address) {this.address = address;}
}}
public class Address {String street;String city;String address;public Address() {}public Address(String street, String city, String address) {this.street = street;this.city = city;this.address = address;}public Address(String street, String city) {this.street = street;this.city = city;}public String getStreet() {return street;}public void setStreet(String street) {this.street = street;}public String getCity() {return city;}public void setCity(String city) {this.city = city;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}public class Game {Address address;public Address getAddress() {return address;}public void setAddress(Address address) {this.address = address;}
}
public class GameDTO {String street;String city;String address;public String getStreet() {return street;}public void setStreet(String street) {this.street = street;}public String getCity() {return city;}public void setCity(String city) {this.city = city;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}@Overridepublic String toString() {final StringBuffer sb = new StringBuffer("GameDTO{");sb.append("street='").append(street).append('\'');sb.append(", city='").append(city).append('\'');sb.append(", address='").append(address).append('\'');sb.append('}');return sb.toString();}
}import org.junit.jupiter.api.Test;
import org.modelmapper.ModelMapper;
import org.modelmapper.PropertyMap;
import org.modelmapper.TypeMap;
import org.modelmapper.convention.MatchingStrategies;public class MainTest {@Testpublic void testStrage() {ModelMapper modelMapper = new ModelMapper();PropertyMap<Game, GameDTO> personMap = new PropertyMap<Game, GameDTO>() {protected void configure() {map().setStreet(source.getAddress().getStreet());map(source.getAddress().city, destination.city);}};modelMapper.addMappings(personMap);//Game game=new Game();Address address=new Address();address.setStreet("street");address.setCity("city");game.setAddress(address);GameDTO gameDTO = modelMapper.map(game, GameDTO.class);System.out.println("PropertyMap="+gameDTO);//设置策略ModelMapper modelMapper1 = new ModelMapper();modelMapper1.getConfiguration().setMatchingStrategy(MatchingStrategies.STANDARD);GameDTO gameDTO1 = modelMapper1.map(game, GameDTO.class);System.out.println("STANDARD="+gameDTO1);//设置策略ModelMapper modelMapper2 = new ModelMapper();modelMapper2.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);GameDTO gameDTO2 = modelMapper2.map(game, GameDTO.class);System.out.println("STRICT="+gameDTO2);//设置策略ModelMapper modelMapper3 = new ModelMapper();modelMapper3.getConfiguration().setMatchingStrategy(MatchingStrategies.LOOSE);GameDTO gameDTO3 = modelMapper3.map(game, GameDTO.class);System.out.println("LOOSE="+gameDTO3);}//测试深度映射@Testpublic void testDeepMapping() {ModelMapper modelMapper = new ModelMapper();TypeMap<Game, GameDTO> typeMap = modelMapper.createTypeMap(Game.class, GameDTO.class);typeMap.addMappings(mapper -> mapper.map(src ->src.getAddress().getAddress(),GameDTO::setAddress));Game game = new Game();game.setAddress(new Address("1", "John","address"));GameDTO gameDTO = modelMapper.map(game, GameDTO.class);System.out.println("dto:"+gameDTO);}//测试 skip@Testpublic void testSkipMapping() {ModelMapper modelMapper = new ModelMapper();TypeMap<Game, GameDTO> typeMap = modelMapper.createTypeMap(Game.class, GameDTO.class);typeMap.addMappings(mapper -> mapper.skip(GameDTO::setAddress));Game game = new Game();game.setAddress(new Address("1", "John","address"));GameDTO gameDTO = modelMapper.map(game, GameDTO.class);System.out.println("dto:"+gameDTO);}//测试 skip null 属性@Testpublic void testSkipNullMapping() {ModelMapper modelMapper = new ModelMapper();modelMapper.getConfiguration().setSkipNullEnabled(true);Game game = new Game();//Address 的address属性为空，不copygame.setAddress(new Address("1", "John",""));GameDTO gameDTO = modelMapper.map(game, GameDTO.class);System.out.println("dto:"+gameDTO);}
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