Java8 List字符串 去重

http://blog.csdn.net/jiaobuchong/article/details/54412094 

public List<String> removeStringListDupli(List<String> stringList) {
     Set<String> set = new LinkedHashSet<>();
     set.addAll(stringList);
     stringList.clear();
     stringList.addAll(set);
     return stringList; 
}

或使用Java8的写法：

        List<String> unique = list.stream().distinct().collect(Collectors.toList());
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可以参见:http://stackoverflow.com/questions/30745048/how-to-remove-duplicate-objects-from-java-arraylist 
http://blog.csdn.net/growing_tree/article/details/46622579

http://www.cnblogs.com/jizha/p/java_arraylist_duplicate.html

http://stackoverflow.com/questions/29670116/remove-duplicates-from-a-list-of-objects-based-on-property-in-java-8