对一个文本中句子里的单词进行操作

Question

问题遇到的现象和发生背景

对一个文本中句子里的单词进行操作

用代码块功能插入代码，请勿粘贴截图

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
public class lab4 {
public static boolean isCharVowel(char ch) {
return ch == 'a' || ch == 'e' || ch == 'u'
 || ch == 'i' || ch == 'o' || ch == 'y';
}
public static void main(String[] args) {
String path = "F:\\lab.txt";
File file = new File(path);
FileReader fr = null;
try {
fr = new FileReader(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
BufferedReader br = new BufferedReader(fr);
String line;
try {
while((line = br.readLine()) != null){
for (String str : line.split(" ")) {
 char c = str.charAt(0);
 String toPrint = str;
 if (isCharVowel(c)) {
 toPrint = String.valueOf(c).toUpperCase() + 
str.substring(1);
 }
 System.out.print(toPrint + " ");
 }
}
} catch (IOException e) {
e.printStackTrace();
} 
}
}

我想要达到的结果

将文本中每一句中的单词逆序排列（1.句子顺序不能改变 2.每个单词里字母的顺序不能改变）

Answer 1

先分割为每一句话，再根据空格分割后，倒叙输出

import java.io.*;
public class FileDemo {
    public static void main(String[] args) {
        //读取文件内容
        String path = "D:\\aa\\lab.txt";
        File file = new File(path);
        if (!file.exists()){
            System.out.println("文件不存在！");
            return;
        }
        InputStreamReader read = null;
        BufferedReader bufferedReader=null;
        StringBuffer sb=null;
        try {
            read = new InputStreamReader(new FileInputStream(file));
            bufferedReader = new BufferedReader(read);
            String lineText = null;
            sb=new StringBuffer();
            while((lineText = bufferedReader.readLine())!=null){
                sb.append(lineText);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        //分割每句话
        String[] strs = sb.toString().split(",|\\.|\\!|\\?");
        reverseTxt(strs);
        System.out.println("逆序后的结果：");
        for (String s:strs){
            System.out.println(s);
        }
    }

    public static void reverseTxt(String [] arr){
        StringBuffer sb=null;
        for(int i=0;i<arr.length;i++){
            String[] s = arr[i].split(" ");
            sb=new StringBuffer();
            for(int j=s.length-1;j>=0;j--)
                sb.append(s[j]+" ");
            arr[i]=sb.toString().trim();
        }
    }
}