读取txt内容放入set中

 package pingbi;

 /**
  * 将txt文本读入导入到set中
  * 问题：
  * 第一个地方有会多一个 ？--解决问题很简单，但不知道问题的原因
  */
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStreamReader;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Set;

 public class MyTest {
     // private static String ENCODING = "gbk";
     private static String ENCODING = "UTF-8";

     public static void main(String[] args) throws Exception {
         Set<String> set = readKeyWord();

         Iterator<String> it = set.iterator();
         while (it.hasNext()) {
             String str = it.next();
             System.out.println(str);
         }
         System.out.println(set.size());
     }

     public static Set<String> readKeyWord() throws Exception {
         Set<String> set = null;

         String filepath = "E:\\pingbi\\key.txt";
         File file = new File(filepath); // 读取文件
         //String filename = "key.txt";

         InputStreamReader read = new InputStreamReader(new FileInputStream(filepath), ENCODING);
         try {
             if (file.isFile() && file.exists()) {// 文件流是否存在
                 set = new HashSet<String>();
                 BufferedReader bufferedReader = new BufferedReader(read);
                 String txt;
                 while ((txt = bufferedReader.readLine()) != null) {//读取文件，将文件内容放入到set中
                     set.add(txt);
                 }
             } else {//不存在抛出异常信息
                 throw new Exception("敏感词库文件不存在");
             }
         } catch (Exception e) {
             throw e;
         } finally {
             read.close();//关闭文件流
         }
         return set;
     }
 }