pojo集合去重

public static 
 
   Predicate
  
    distinctByKey(Function
    keyExtractor) { Map
   
     seen = new ConcurrentHashMap<>(); return t -> seen.putIfAbsent(keyExtractor.apply(t), Boolean.TRUE) == null; }
   
  
 

//获取部门名称列表
 List
 
   stringList = inputContentList.stream().
                    filter(n -> StringUtils.isNotBlank(n.getContentUserDeptName())).
                    filter(distinctByKey(o -> o.getContentUserDeptName())).
                    map(EnterpriseContent::getContentUserDeptName).collect(Collectors.toList());