Collections.sort()排序

Collections.sort()排序,实体类获取某个属性，进行排序，升序

//获取等级code新方法，取最大值加1
Collections.sort(list,new Comparator<CodeFieldZjlb>() {
    @Override
    public int compare(CodeFieldZjlb o1, CodeFieldZjlb o2) {
        String code1 = o1.getLevelcode();
        String code2 = o1.getLevelcode();
        return code1.compareTo(code2);
    }
});