List中的对象，依照对象的不同属性 进行分割list

	public Map<String,ArrayList> separete(List list){
        TreeMap tm=new TreeMap();
        
        for(int i=0;i<list.size();i++){
        	HuaweiStation s=(HuaweiStation)list.get(i);
            if(tm.containsKey(s.getBustime())){
	             ArrayList l11=(ArrayList)tm.get(s.getBustime());
	             l11.add(s);
            }else{
            	 ArrayList tem=new ArrayList();
                 tem.add(s);
                 tm.put(s.getBustime(), tem);
            }
            
        }
        return tm;
    }