Java8 list根據對象某個屬性去重

標籤：ica   super   actor   cti   ati   object   lis   屬性   util   

1. 添加方法：

import java.util.concurrent.ConcurrentHashMap;import java.util.function.Function;import java.util.function.Predicate;import java.util.stream.Collectors;private static <T> Predicate<T> distinctByKey(Function<? super T, Object> keyExtractor) {        Map<Object, Boolean> seen = new ConcurrentHashMap<>();        return t -> seen.putIfAbsent(keyExtractor.apply(t), Boolean.TRUE) == null;    }

2. 使用：

facultyRetList = facultyList.stream().filter(distinctByKey(Faculty::getId)).collect(Collectors.toList());

 

Java8 list根據對象某個屬性去重