Stream filter和groupby例子
发布时间 2023-07-11 16:59:00作者: sensen~||^_^|||&
Set<String> type = new HashSet<String>();
type.add("1");
type.add("2");
type.add("3");
type.add("4");
BU_MAP_SECTION = sectionNodes.stream().filter(item -> {
Integer parentid = item.getParentid();
boolean isParent_1 = parentid.equals(new Integer("-1"));
String depttypecode = item.getDepttypecode();
boolean isContain = type.contains(depttypecode);
if (isParent_1 && isContain) {
return true;
}
return false;
}).collect(Collectors.groupingBy(item->{
return item.getBureaucode();
}));
//BU_MAP_SECTION = sectionNodes.stream().collect(Collectors.groupingBy(Jcdept::getBureaucode));