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.過濾後取出需要的值拼接成字串

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(","));