java8 lamda

//取出id并去重生成新list
List<Long> orderDoctorIds = doctorListVos.stream().map(DoctorListVo::getId).collect(Collectors.toList())
                    .stream().distinct().collect(Collectors.toList());

//使⽤stream流把list1和list2根据属性userId合并⼀个list集合
List<Map<String, Object>> list = list1.stream().map(m ->{
            list2.stream().filter(m2-> Objects.equals(m.get("userId"),m2.get("userId"))).forEach(m2->{
                m.put("gender",m2.get("gender"));
                m.put("age",m2.get("age"));
});
return m;
}).collect(Collectors.toList());