JS实现AOP  

<script>
function actsAsAspect(obj,handlers) {
       if(typeof obj == ‘function‘){
           obj = obj.prototype;
       }
       
       for(var methodName in handlers){
           var _handlers = handlers[methodName];
           for(var handler in _handlers){
               if((handler == ‘before‘ || handler == ‘after‘)&& typeof _handlers[handler] ==‘function‘){
                   eval_r(handler)(obj,methodName,_handlers[handler]);
               }
           }
       }

       function before(obj,method,f) {
           var original = obj[method];  
           obj[method] = function() {
               f.apply(this, arguments);  
               return original.apply(this, arguments);  
           }
       }

       function after(obj,method, f) {  
           var original = obj[method];  
           obj[method] = function() {
               original.apply(this, arguments);  
               return f.apply(this, arguments);  
           }
       }
    }
    
   //actsAsAspect(Test,{‘say2‘:{before:function(){alert(‘before‘);},after:function(){alert(‘after‘);}}});  
    
    functionTest(){}   

   //actsAsAspect(Test,{‘say2‘:{before:function(){alert(‘before‘);},after:function(){alert(‘after‘);}}});  

   Test.prototype.say2 = function(s){
       alert(s);
    }
    
   actsAsAspect(Test,{‘say2‘:{before:function(){alert(‘before‘);},after:function(){alert(‘after‘);}}});  

    var t = newTest(); 

   //actsAsAspect(t,{‘say2‘:{before:function(){alert(‘before‘);},after:function(){alert(‘after‘);}}});  
   t.say2("hello2"); 

</script>

由于新浪的编辑器太差了,把eval_r改成eval就可以运行了

支持对Class 和 Object 两种类型的AOP,前者是基于对prototype的修改,后者是对对象的方法修改