java1.8 stream常用的方法记录
1.从List<Map<String,String>>中取map的一个值,并用逗号拼接
List<Map<String, String>> sendZhusongIdList = dispatchDO.getSendZhusongIdList();
String sendZhusongName = sendZhusongIdList.stream().map(x -> x.get("text")).collect(Collectors.joining(","));
System.err.println("sendZhusongName:"+sendZhusongName);
2.过滤后取出需要的值拼接成字符串
List<OpinionDO> opinionList = opinionService.listByMainId(map.get("ID").toString());
String deptLeaderName = opinionList.stream().filter(x->"divisionHead".equals(x.getFieldKey()))map(x->x.getCreateUserName().toString()).collect(Collectors.joining(","));