JAVA8新特性lambda表达式（优雅的去重）

字符串去重

List dataList = list.stream().distinct().collect(Collectors.toList());

对象属性去重

//根据getName去重
personList = personList.stream().collect(Collectors.collectingAndThen(Collectors.toCollection(
                () -> new TreeSet<>(Comparator.comparing(Person::getName))), ArrayList::new));