根据小写26个字母，随机生成单词，乱文

根据小写26个字母，随机生成单词，乱文

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Random;

/**
 * @author Mxhlin
 * @Email fuhua277@163.com
 * @Date 2022/09/22/19:27
 * @Version
 * @Description 根据小写26个字母，随机生成单词，乱文
 */
public class OutputStreamDemo {
    public static void main(String[] args) {
        Random rand = new Random();
        try (FileOutputStream fos = new FileOutputStream("木.txt")){
            for (int i = 0; i < 100; i++) {
                fos.write(randStr(rand.nextInt(2,20)).concat("\t\n").getBytes());
            }
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
    public static String randStr(int n) {
        Random rand = new Random();
        String letter = "abcdefghijklmnopqrstuvwsyz";
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < n; i++) {
            StringBuilder sb1 = new StringBuilder();
            int len = rand.nextInt(2,10);// 随机单词的长度
            for (int j = 0; j < len; j++) {// 给单词赋值
                sb1.append(letter.charAt(rand.nextInt(letter.length())));
            }
            sb1.append(" ");// 后面添加空格

            String ts = new String(sb1);
            if (i ==0 ){
                // 首字母大写
                ts = ts.substring(0,1).toUpperCase().concat(ts.substring(1));
            }else if (i == n-1){
                // 结尾符号
                ts = ts.substring(0,ts.length()-1)+"!.?".charAt(rand.nextInt(3));
            }
            sb.append(ts);
        }
        return sb.toString()    ;
    }
}