java - 标点符号保存在词袋中吗？

Question

我正在从头开始创建一个词袋模块。我不确定是否删除标点符号是否是这种方法的最佳实践。考虑这个句子

I've been "DMX world center" for long time ago.Are u?

问题:对于词袋，我应该考虑

• token DMX(无引号)或 "DMX(包含左引号)
• u(不带问号)或 u?(带问号)

简而言之，在获取不同的单词时是否应该删除所有标点符号？

提前致谢

已更新 这是我实现的代码

示例文本:火腿，我.. 在滑雪之旅中。我想知道你是否打算在我们出发前让大家聚在一起……进行一次见面和打招呼之类的 Activity ？干杯，

   HashSet<String> bagOfWords = new HashSet<String>();
   BufferedReader reader = new BufferedReader(new FileReader(path));
   while (reader.ready()) {
       String msg = reader.readLine().split("\t", 2)[1].toLowerCase(); // I get only the 2nd part. 1st part indicate wether message is spam or ham
       String[] words = msg.split("[\\s+\n.\t!?+,]"); // this is the regex that I've used to split words
       for (String word : words) {
           bagOfWords.add(word);
       }
   }

Answer 1

尝试替换您的代码

 while (reader.ready()) {
       String msg = reader.readLine().split("\t", 2)[1].toLowerCase(); // I get only the 2nd part. 1st part indicate wether message is spam or ham
       String[] words = msg.split("[\\s+\n.\t!?+,]"); // this is the regex that I've used to split words
       for (String word : words) {
           bagOfWords.add(word.replaceAll("[!-+.^:,\"?]"," ").trim()); // it removes all sepecial characters what you mentioned
       }
   }