4、设计模式之速配器模式(Adapter)

php 速配器模式实例

速配器 将一个类（对象）的接口（方法或者属性）转化成另一个接口，以满足用户需求，使类（对象）之间的不兼容问题通过速配器得以解决。
应用：数据库操作以及缓存策略

demo0

/**
* 速配目标 规定的接口将被速配对象实现
* Interface Database
*/
interface Database
{
    public function connect($host,$username,$pwd,$database);

    public function query($sql);

    //    public function insert($sql);
    //    public function find($sql);
    //    public function update($sql);
    //    public function delete($sql);
}

/**
* 速配器
* Class Mysql
*/
class Mysql implements Database{
    protected $_connect;

    public function connect($host, $username, $pwd, $database)
    {
        $connect = mysqli_connect($host,$username,$pwd,$database);
        mysqli_select_db($database,$connect);
        $this->_connect = $connect;
        // TODO: Implement connect() method.
    }

    public function query($sql)
    {
        // TODO: Implement query() method.
    }
}

/**
* 速配器
* Class Mongodb
*/
class Mongodb implements Database{
    protected $_connect;
    public function connect($host, $username, $pwd, $database)
    {
        $server = "mongodb://".$host.":27017";
        $m = new MongoClient($server); // 连接默认主机和端口为：mongodb://localhost:27017
        $connect = $m->$database;
        $this->_connect = $connect;
        // TODO: Implement connect() method.
    }

    public function query($sql)
    {
        // TODO: Implement query() method.
    }
}
$client = new Mysql();
$client->query($sql);

javascript 速配器模式 实例

demo1

    var A = A || {};
    window.A = A = jQuery;
    A.g = function(id)
    {
        return $(id).get(0);
    }
    A.on = function(id,type,fn)
    {
        var dom = typeof id === 'string'?$('#'+id):$(id);
        dom.on(type,fn);
    }

    A.on(window,'load',function(){
        A.on('mybutton','click',function(){
            console.log('click');
        })
    })

php设计模式