代码如下：
var Interface = function(name,methods){
if(arguments.length != 2){
throw new Error('必须输入两个参数,当前个数'+arguments.length);
}
this.name=name;
this.methods=[];
for(var i=0, len=methods.length; i<len; i++){
if(typeof methods[i] !== 'string'){
throw new Error('方法名参数必须为string');
}
this.methods.push(methods[i]);
}
};
Interface.ensureImplements = function(object){
if(arguments.length < 2){
throw new Error('必须输入两个参数,当前个数' + arguments.length);
}
for(var i=1, len=arguments.length; i < len; i++){
var interface = arguments[i];
if(interface.constructor != Interface){
throw new Error("请实现接口");
}
for (var j = 0, methodsLen = interface.methods.length; j < methodsLen; j++){
var method = interface.methods[j];
if(!object[method] || typeof object[method] !== 'function'){
throw new Error("接口名:"+interface.name+"方法名："+method+"没找到");
}
};
}
}
var DynamicMap = new Interface('DynamicMap',['centerOnPoint','zoom','draw']);
function displayRoute(mapInstance){
Interface.ensureImplements(mapInstance,DynamicMap);
mapInstance.centerOnPoint(12,34);
mapInstance.zoom(5);
mapInstance.draw();
}
var a={
centerOnPoint:function(x,y){
console.log(x*y);
},
zoom:function(x){
console.log(x);
},
draw:function(){
console.log("x*y");
}
}
displayRoute(a);