var s:String = "hellojavaeoojavapopejava"; //不这样做会改变原来的字符串s var _s:String = s; var s1:String = "java"; var index,count:int = 0; while (_s.indexOf(s1)!=-1) { index = _s.indexOf(s1); trace(index) _s = _s.substring(index + s1.length); count++; } trace("字符串出现次数---"+count); trace(s); trace(s1);