问答式对话内容正则表达式切割（切割问 - 答之间的内容）

需求：问答式对话内容通过正则表达式切割出来

txt文件内容：

代码如下：

package com.test;

import com.hankcs.hanlp.HanLP;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class DataPreProcess {

    /**
     * 封装正则表达式处理的方法
     * @param line
     * @param regex
     * @return
     * @throws IOException
     */
    private static ArrayList<String> lineProcess(String line,String regex) throws IOException {
        Pattern pattern=Pattern.compile(regex);
        Matcher matcher=pattern.matcher(line);
        ArrayList<String> str=new ArrayList<>();
        while (matcher.find()){
            str.add(line.substring(matcher.start(),matcher.end()));
        }
        return str;
    }

    /**
     * 封装读取TXT文件内容的方法
     * @param filePath
     * @return
     */
    public static String readTxtFile(String filePath) {
            String encoding = "GBK";
            String result="";
            try{
            File file = new File(filePath);
            if (file.isFile() && file.exists()) {//判断文件是否存在
                InputStreamReader read = new InputStreamReader(new FileInputStream(file), encoding);
                BufferedReader bufferedReader = new BufferedReader(read);
                String lineTxt = "";
                while ((lineTxt = bufferedReader.readLine()) != null) {
                    result+=lineTxt;
                }
                read.close();
            } else {
                result="找不到指定文件";
            }
        } catch (Exception e) {
             e.printStackTrace();
        }
        return result;
    }

    public static void main(String[] args)throws Exception{
        String line=readTxtFile("C:\\Users\\Administrator\\Desktop\\bilu.txt");
        /*方式一（第一时间想到的，比较不通用）：
        String regexAsk="(?<=问：)([^ ]+?)(?=答：)";
        ArrayList askList=lineProcess(line,regexAsk);
        String regexAnwser="(?<=答：)([^ ]+?)[(?<=问：)(?<=。)]";
        ArrayList anwserList=lineProcess(line,regexAnwser);
        for (String s:askList){
            System.out.println(s);
        }
        for (String s:anwserList){
            System.out.println(s);
        }*/
        //方式二：
        String regx="问：([^答]*)答：([^问]*)";
        ArrayList<String> askList=new ArrayList<>();
        ArrayList<String> anwserList=new ArrayList<>();
        Matcher matcher=Pattern.compile(regx).matcher(line);
        while(matcher.find()){
            askList.add(matcher.group(1));
            anwserList.add(matcher.group(2));
        }
        for (String s:askList){
            System.out.println(s);
        }
        for (String s:anwserList){
            System.out.println(s);
        }
    }

}

切割效果：