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;
    }
}