_.mapDistinct public static <T, R> List<R> mapDistinct(List<T> dataSources, Function<T, R> mapper) Copy参数dataSources (List<T>) 要去重的集合。mapper 将原始类型转换成新的类型返回值List<R> 返回一个去重后的新 List<R> 集合。例子EnhanceStream.mapDistinct(Arrays.asList( new Person(12, "孙悟空"), new Person(12, "猪八戒"), new Person(13, "孙悟空") ), Person::getAge);//=> [12, 13]Copy