这节主要介绍下@AfterMapping

1.添加新的业务类

data class Apple(var appleId:Int, var appleName:String,var real:Boolean){    constructor():this(0,"",false)}data class AppleDto(var appleId:Int, var appleName:String,var description:String){    constructor():this(0,"","")}

2.添加映射

@Mapperabstract class AppleConverter {    //忽略target description字段映射    @Mapping(target = "description",ignore = true)    abstract fun convertToDto(apple: Apple) : AppleDto    //忽略target real字段映射	@Mapping(target = "real",ignore = true)    abstract fun convertToModel(appleDto: AppleDto) : Apple     //convertToDto执行完成后手动给appleDto的description字段赋值    @AfterMapping    protected fun afterConvertToDto(apple: Apple, @MappingTarget appleDto: AppleDto) {        val description = if(apple.real) "水果" else "数码"        appleDto.description = description    }	//convertToModel执行完成后手动给apple的real字段赋值    @AfterMapping    protected fun afterConvertToModel(appleDto: AppleDto, @MappingTarget apple: Apple) {        val real = if(appleDto.description == "水果") true else false        apple.real = real    }}

3.调用一下吧

val appleConverter = Mappers.getMapper(AppleConverter::class.java)    val apple = Apple(1,"my apple",true)    println(apple)    val appleDto = appleConverter.convertToDto(apple)    println(appleDto)    val appleModel = appleConverter.convertToModel(appleDto)    println(appleModel)

输出

Apple(appleId=1, appleName=my apple, real=true)AppleDto(appleId=1, appleName=my apple, description=水果)Apple(appleId=1, appleName=my apple, real=true)