Orika映射工具MapperFactory使用方法,及LocalDateTime转换异常

一、创建MapperFactory

手动创建

MapperFactory mapperFactory = new DefaultMapperFactory.Builder().build();

spring创建

@Bean    public MapperFactory getFactory(){        return new DefaultMapperFactory.Builder().build();    }

二、使用方法

如果两个类中的属性名一样，类型不一样，会自动转换。如果无法转换会报错。

1. 单个类映射单个类(字段名不完全一样)

//注意User中的name和UserVO中的username属性名不同，age的类型也不同class User {    private String name;    private String age;    private String  sex;    //Setter,Getter}class UserVO {    private String username;    private Integer age;    private String  sex;    //Setter,Getter}

public void UserToUserVO(User user) {    //先注册以下映射方式    mapperFactory.classMap(User.class, UserVO.class)                .field("name","username")//不一样的字段映射                .byDefault()//剩余的字段映射                .register();    UserVO uservo = mapperFactory.getMapperFacade().map(user, UserVO.class);}

2. 单个类映射单个类(字段名完全一样)

//注意age的类型不同class User {    private String username;    private String age;    private String  sex;    //Setter,Getter}class UserVO {    private String username;    private Integer age;    private String  sex;    //Setter,Getter}

public void UserToUserVO(User user) {    UserVO uservo = mapperFactory.getMapperFacade().map(user, UserVO.class);}

3. 集合映射呈另一个泛型的集合

//注意User中的name和UserVO中的username属性名不同，age的类型也不同class User {    private String name;    private String age;    private String  sex;    //Setter,Getter}class UserVO {    private String username;    private Integer age;    private String  sex;    //Setter,Getter}

    public void copyUserListToUserVOList(List<User> userList){        //手动配置不一样的属性转换        mapperFactory.classMap(User.class, UserVO.class)                .field("name","username")//不一样的字段映射                .byDefault()//剩余的字段映射                .register();        //转换List        List<UserVO> userVOList = mapperFactory.getMapperFacade().mapAsList(userList, UserVO.class);        //打印验证一下(重写UserVO的tostring)        userVOList.forEach(user -> {            System.out.println(user);        });

三、用了java8中的LocalDateTime结果发现转换异常，解决方法为：在容器中增加一个bean，如下：

@Componentpublic class OrikaMapperFactoryExtend {    @Autowired    private MapperFactory mapperFactory;    @PostConstruct    public void init() {        mapperFactory.getConverterFactory().registerConverter(new LocalDateTimeConverter());        mapperFactory.getConverterFactory().registerConverter(new LocalDateConverter());        mapperFactory.getConverterFactory().registerConverter(new LocalTimeConverter());    }    private class LocalDateTimeConverter extends BidirectionalConverter<LocalDateTime, LocalDateTime> {        @Override        public LocalDateTime convertTo(LocalDateTime source, Type<LocalDateTime> destinationType) {            return LocalDateTime.from(source);        }        @Override        public LocalDateTime convertFrom(LocalDateTime source, Type<LocalDateTime> destinationType) {            return LocalDateTime.from(source);        }    }    private class LocalDateConverter extends BidirectionalConverter<LocalDate, LocalDate> {        @Override        public LocalDate convertTo(LocalDate source, Type<LocalDate> destinationType) {            return LocalDate.from(source);        }        @Override        public LocalDate convertFrom(LocalDate source, Type<LocalDate> destinationType) {            return LocalDate.from(source);        }    }    private class LocalTimeConverter extends BidirectionalConverter<LocalTime, LocalTime> {        @Override        public LocalTime convertTo(LocalTime source, Type<LocalTime> destinationType) {            return LocalTime.from(source);        }        @Override        public LocalTime convertFrom(LocalTime source, Type<LocalTime> destinationType) {            return LocalTime.from(source);        }    }}