private Map<String,String> mapDate;//正序mapDate=new TreeMap<String, String>(new Comparator<String>() {            @Override            public int compare(String lhs, String rhs) {                // TODO Auto-generated method stub                return lhs.compareTo(rhs);            }        });//倒序mapDate=new TreeMap<String, String>(new Comparator<String>() {            @Override            public int compare(String lhs, String rhs) {                // TODO Auto-generated method stub                return rhs.compareTo(lhs);            }        });

List<String> mSections=new mSections = new ArrayList<String>();
Collections.sort(mSections);