设计模式-适配器模式（Kotlin）_kotlin 适配器-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_37635604/article/details/127408445

本文详细介绍了适配器模式在现实生活中的USB应用实例，包括类适配器、对象适配和接口适配三种模式，并通过代码示例展示其实现原理。

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适配器模式在现实生活中有很多用处，比如我们使用的USB接口，就是一个典型的适配器模式，

输入的很可能是手机的USB，鼠标的USB，键盘的USB，等等，然后电脑再通过适配器模式去适配一个个输入

适配器模式分三种，一种是类适配器模式，一种是对象适配器模式，还有一种是接口适配器模式

类适配器模式

interface SDCard{
    fun readSD(): String
    fun writeSD(msg: String)
}

class SDCardImpl : SDCard{
    override fun readSD(): String {
        return "sd card read a msg :hello word SD"
    }

    override fun writeSD(msg: String) {
        println("sd card write msg : $msg")
    }
}

class Computer{
    fun readSD(sdCard: SDCard): String{
        return sdCard.readSD()
    }
}

interface TFCard{
    fun readTF(): String
    fun writeTF(msg: String)
}

open class TFCardImpl: TFCard{
    override fun readTF(): String {
        return "tf card read a msg :hello word TF"
    }

    override fun writeTF(msg: String) {
        println("TF card write msg : $msg")
    }
}

class SDAdapterTF: TFCardImpl(),SDCard{
    override fun readSD(): String {
        println("adapter read tf card")
        return readTF()
    }

    override fun writeSD(msg: String) {
        println("adapter write tf card")
        writeTF(msg)
    }
}

对象适配器模式

interface SDCard{
    fun readSD(): String
    fun writeSD(msg: String)
}

class SDCardImpl : SDCard{
    override fun readSD(): String {
        return "sd card read a msg :hello word SD"
    }

    override fun writeSD(msg: String) {
        println("sd card write msg : $msg")
    }
}

class Computer{
    fun readSD(sdCard: SDCard): String{
        return sdCard.readSD()
    }
}

interface TFCard{
    fun readTF(): String
    fun writeTF(msg: String)
}

class TFCardImpl: TFCard{
    override fun readTF(): String {
        return "tf card read a msg :hello word TF"
    }

    override fun writeTF(msg: String) {
        println("TF card write msg : $msg")
    }
}

class SDAdapterTF(private val tfCard: TFCard):SDCard{
    override fun readSD(): String {
        println("adapter read tf card")
        return tfCard.readTF()
    }

    override fun writeSD(msg: String) {
        println("adapter write tf card")
        tfCard.writeTF(msg)
    }
}

接口适配器模式

interface SDCard{
    fun readSD(): String
    fun writeSD(msg: String)
}

class SDCardImpl : SDCard{
    override fun readSD(): String {
        return "sd card read a msg :hello word SD"
    }

    override fun writeSD(msg: String) {
        println("sd card write msg : $msg")
    }
}

abstract class Adapter: SDCard{
    override fun readSD(): String {
        return "adapter"
    }

    override fun writeSD(msg: String) {
        println(msg)
    }
}

class Computer{
    fun readSD(sdCard: SDCard): String{
        return sdCard.readSD()
    }
}

interface TFCard{
    fun readTF(): String
    fun writeTF(msg: String)
}

class TFCardImpl: TFCard{
    override fun readTF(): String {
        return "tf card read a msg :hello word TF"
    }

    override fun writeTF(msg: String) {
        println("TF card write msg : $msg")
    }
}

class TFtoSD(private val tfCard: TFCard): Adapter() {
    override fun readSD(): String {
        println("adapter read tf card")
        return tfCard.readTF()
    }
}