list集合 使用java8同一列表获取前一条的数据放到当前对象中

/**
     * 外部系统获取审批历史
     * @param paramMap
     * @return
     */
    @Override
    public List<Map<String,Object>> getApproveLog(Map<String, Object> paramMap) {
        List<Map<String, Object>> list = approveLogMapper.getApproveLog(paramMap);
        IntStream.range(0,list.size()).forEach(i->{
            //System.out.println(list.get(i).get("approveTitle"));
                Map<String, Object> map1 = list.get(i);
                if (i != list.size()-1){
                    Map<String, Object> map2 = list.get(i + 1);
                    map2.put("preApproveUserCode",map1.get("approveUserCode")); // 获取上一条对象的数据放到下一条
                    map2.put("preApproveUserName",map1.get("approveUserName"));
                }
        });
        return list;
    }