学网站开发月薪多少钱,上海闵行区房价,网站关键词优化到首页难度,通过模板做网站文章目录 1. 概念1.1 角色1.2 应用场景1.2 类图 2. 代码示例2.1 设计2.2 代码2.3 示例类图 1. 概念
定义一个适配器#xff0c;帮助原本不能实现接口的类“实现”该接口
1.1 角色
目标#xff08;Target#xff09;#xff1a;客户端调用的目标接口 被适配者#xff08… 文章目录 1. 概念1.1 角色1.2 应用场景1.2 类图 2. 代码示例2.1 设计2.2 代码2.3 示例类图 1. 概念
定义一个适配器帮助原本不能实现接口的类“实现”该接口
1.1 角色
目标Target客户端调用的目标接口 被适配者Adaptee已经存在且运行良好的类或对象但它不能实现Taget接口。 适配器Adapter继承或管理被适配者且可以实现目标接口。
1.2 应用场景
背景 已经有一个目标接口供客户端调用根据需求新增一个类该类不能实现目标接口修改目标接口开销会很大 解决方法 我们新增一个类——适配器适配器继承新增类且可以实现目标接口 结果 客户端用适配器处理新增类的实例得到的实例可以实现目标接口。
1.2 类图 #mermaid-svg-BHF9sKSa7JyogYyB {font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}#mermaid-svg-BHF9sKSa7JyogYyB .error-icon{fill:#552222;}#mermaid-svg-BHF9sKSa7JyogYyB .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-BHF9sKSa7JyogYyB .edge-thickness-normal{stroke-width:2px;}#mermaid-svg-BHF9sKSa7JyogYyB .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-BHF9sKSa7JyogYyB .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-BHF9sKSa7JyogYyB .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-BHF9sKSa7JyogYyB .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-BHF9sKSa7JyogYyB .marker{fill:#333333;stroke:#333333;}#mermaid-svg-BHF9sKSa7JyogYyB .marker.cross{stroke:#333333;}#mermaid-svg-BHF9sKSa7JyogYyB svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-BHF9sKSa7JyogYyB g.classGroup text{fill:#9370DB;fill:#131300;stroke:none;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:10px;}#mermaid-svg-BHF9sKSa7JyogYyB g.classGroup text .title{font-weight:bolder;}#mermaid-svg-BHF9sKSa7JyogYyB .nodeLabel,#mermaid-svg-BHF9sKSa7JyogYyB .edgeLabel{color:#131300;}#mermaid-svg-BHF9sKSa7JyogYyB .edgeLabel .label rect{fill:#ECECFF;}#mermaid-svg-BHF9sKSa7JyogYyB .label text{fill:#131300;}#mermaid-svg-BHF9sKSa7JyogYyB .edgeLabel .label span{background:#ECECFF;}#mermaid-svg-BHF9sKSa7JyogYyB .classTitle{font-weight:bolder;}#mermaid-svg-BHF9sKSa7JyogYyB .node rect,#mermaid-svg-BHF9sKSa7JyogYyB .node circle,#mermaid-svg-BHF9sKSa7JyogYyB .node ellipse,#mermaid-svg-BHF9sKSa7JyogYyB .node polygon,#mermaid-svg-BHF9sKSa7JyogYyB .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-BHF9sKSa7JyogYyB .divider{stroke:#9370DB;stroke:1;}#mermaid-svg-BHF9sKSa7JyogYyB g.clickable{cursor:pointer;}#mermaid-svg-BHF9sKSa7JyogYyB g.classGroup rect{fill:#ECECFF;stroke:#9370DB;}#mermaid-svg-BHF9sKSa7JyogYyB g.classGroup line{stroke:#9370DB;stroke-width:1;}#mermaid-svg-BHF9sKSa7JyogYyB .classLabel .box{stroke:none;stroke-width:0;fill:#ECECFF;opacity:0.5;}#mermaid-svg-BHF9sKSa7JyogYyB .classLabel .label{fill:#9370DB;font-size:10px;}#mermaid-svg-BHF9sKSa7JyogYyB .relation{stroke:#333333;stroke-width:1;fill:none;}#mermaid-svg-BHF9sKSa7JyogYyB .dashed-line{stroke-dasharray:3;}#mermaid-svg-BHF9sKSa7JyogYyB #compositionStart,#mermaid-svg-BHF9sKSa7JyogYyB .composition{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-BHF9sKSa7JyogYyB #compositionEnd,#mermaid-svg-BHF9sKSa7JyogYyB .composition{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-BHF9sKSa7JyogYyB #dependencyStart,#mermaid-svg-BHF9sKSa7JyogYyB .dependency{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-BHF9sKSa7JyogYyB #dependencyStart,#mermaid-svg-BHF9sKSa7JyogYyB .dependency{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-BHF9sKSa7JyogYyB #extensionStart,#mermaid-svg-BHF9sKSa7JyogYyB .extension{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-BHF9sKSa7JyogYyB #extensionEnd,#mermaid-svg-BHF9sKSa7JyogYyB .extension{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-BHF9sKSa7JyogYyB #aggregationStart,#mermaid-svg-BHF9sKSa7JyogYyB .aggregation{fill:#ECECFF!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-BHF9sKSa7JyogYyB #aggregationEnd,#mermaid-svg-BHF9sKSa7JyogYyB .aggregation{fill:#ECECFF!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-BHF9sKSa7JyogYyB .edgeTerminals{font-size:11px;}#mermaid-svg-BHF9sKSa7JyogYyB :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} «interface» Target Service() Class Service() Adapter *Adaptee:Adaptee Service() Adaptee AnotherService() Client 2. 代码示例
2.1 设计
背景 client通过Bird接口可以获取鸟类实例的信息有一个Cat类不能实现Bird接口但是需要client调用Bird接口来获取Cat实例的信息 解决 创建一个适配器CatAdapter 它继承Cat类且实现Bird接口
2.2 代码
package mainimport fmt
//之前有一个Bird接口他可以Get鸟类的信息
type Bird interface {Get()
}//比如这个鹦鹉类实现了Bird接口
type Parrot struct {Name stringFeather string
}func (parrot *Parrot) Get() {fmt.Printf(鹦鹉%q的颜色是%q\n, parrot.Name, parrot.Feather)
}//业务需求多了一个猫的类
type Cat struct {Name stringFur string
}
//它只有Show方法不能实现Bird接口
func (cat *Cat) Show() {fmt.Printf(猫咪%q的颜色是%q\n, cat.Name, cat.Fur)
}//我们创建一个猫的解释器他继承了猫类同时又可以实现Bird接口
type CatAdapter struct {Cat *Cat
}func (catAdapter *CatAdapter) Get() {catAdapter.Cat.Show()
}//有一个客户端
type Client struct {
}
//它可以直接获取bird信息
func (client Client) GetBird(bird Bird) {bird.Get()
}func main() {//实例化一个叫polly的鹦鹉polly : Parrot{Name: polly,Feather: green,}//示例话一个叫tom的猫tom : Cat{Name: tom,Fur: black,}client : Client{}//客户端可以直接使用pollyclient.GetBird(polly)//客户端可以通过解释器使用tomtomAdapter : CatAdapter{Cat: tom}client.GetBird(tomAdapter)
}2.3 示例类图 #mermaid-svg-NhIKHI3dEECuujIH {font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}#mermaid-svg-NhIKHI3dEECuujIH .error-icon{fill:#552222;}#mermaid-svg-NhIKHI3dEECuujIH .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-NhIKHI3dEECuujIH .edge-thickness-normal{stroke-width:2px;}#mermaid-svg-NhIKHI3dEECuujIH .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-NhIKHI3dEECuujIH .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-NhIKHI3dEECuujIH .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-NhIKHI3dEECuujIH .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-NhIKHI3dEECuujIH .marker{fill:#333333;stroke:#333333;}#mermaid-svg-NhIKHI3dEECuujIH .marker.cross{stroke:#333333;}#mermaid-svg-NhIKHI3dEECuujIH svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-NhIKHI3dEECuujIH g.classGroup text{fill:#9370DB;fill:#131300;stroke:none;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:10px;}#mermaid-svg-NhIKHI3dEECuujIH g.classGroup text .title{font-weight:bolder;}#mermaid-svg-NhIKHI3dEECuujIH .nodeLabel,#mermaid-svg-NhIKHI3dEECuujIH .edgeLabel{color:#131300;}#mermaid-svg-NhIKHI3dEECuujIH .edgeLabel .label rect{fill:#ECECFF;}#mermaid-svg-NhIKHI3dEECuujIH .label text{fill:#131300;}#mermaid-svg-NhIKHI3dEECuujIH .edgeLabel .label span{background:#ECECFF;}#mermaid-svg-NhIKHI3dEECuujIH .classTitle{font-weight:bolder;}#mermaid-svg-NhIKHI3dEECuujIH .node rect,#mermaid-svg-NhIKHI3dEECuujIH .node circle,#mermaid-svg-NhIKHI3dEECuujIH .node ellipse,#mermaid-svg-NhIKHI3dEECuujIH .node polygon,#mermaid-svg-NhIKHI3dEECuujIH .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-NhIKHI3dEECuujIH .divider{stroke:#9370DB;stroke:1;}#mermaid-svg-NhIKHI3dEECuujIH g.clickable{cursor:pointer;}#mermaid-svg-NhIKHI3dEECuujIH g.classGroup rect{fill:#ECECFF;stroke:#9370DB;}#mermaid-svg-NhIKHI3dEECuujIH g.classGroup line{stroke:#9370DB;stroke-width:1;}#mermaid-svg-NhIKHI3dEECuujIH .classLabel .box{stroke:none;stroke-width:0;fill:#ECECFF;opacity:0.5;}#mermaid-svg-NhIKHI3dEECuujIH .classLabel .label{fill:#9370DB;font-size:10px;}#mermaid-svg-NhIKHI3dEECuujIH .relation{stroke:#333333;stroke-width:1;fill:none;}#mermaid-svg-NhIKHI3dEECuujIH .dashed-line{stroke-dasharray:3;}#mermaid-svg-NhIKHI3dEECuujIH #compositionStart,#mermaid-svg-NhIKHI3dEECuujIH .composition{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-NhIKHI3dEECuujIH #compositionEnd,#mermaid-svg-NhIKHI3dEECuujIH .composition{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-NhIKHI3dEECuujIH #dependencyStart,#mermaid-svg-NhIKHI3dEECuujIH .dependency{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-NhIKHI3dEECuujIH #dependencyStart,#mermaid-svg-NhIKHI3dEECuujIH .dependency{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-NhIKHI3dEECuujIH #extensionStart,#mermaid-svg-NhIKHI3dEECuujIH .extension{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-NhIKHI3dEECuujIH #extensionEnd,#mermaid-svg-NhIKHI3dEECuujIH .extension{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-NhIKHI3dEECuujIH #aggregationStart,#mermaid-svg-NhIKHI3dEECuujIH .aggregation{fill:#ECECFF!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-NhIKHI3dEECuujIH #aggregationEnd,#mermaid-svg-NhIKHI3dEECuujIH .aggregation{fill:#ECECFF!important;stroke:#333333!important;stroke-width:1;}#mermaid-svg-NhIKHI3dEECuujIH .edgeTerminals{font-size:11px;}#mermaid-svg-NhIKHI3dEECuujIH :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} «interface» Bird Get() Parrot String:Name String:Feather CatAdapter *Cat:Cat Get() Cat String:Name String:Fur Show() Client GetBird(bird Bird)
