java列表中对象排序

Collections.sort(resultList,new Comparator<VcpeCompanyInfo>(){
            public int compare(VcpeCompanyInfo o1, VcpeCompanyInfo o2) {
                if(StringUtil.isEmpty(o1.getClrq())){
                    return 1;
                }else if(StringUtil.isEmpty(o2.getClrq())){
                    return -1;
                }else{
                    //倒序 0-
                    return 0-o1.getClrq().compareTo(o2.getClrq());
                }
            }
        });