package com.multithread;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.util.Scanner;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class RandomStringToFile {

// 判断目录路径是否合法

public static boolean TestFilePath(String dirpath) {

boolean result = false;

try {

File dirname = new File(dirpath);

if (dirname.isDirectory()) {

System.out.println("DirPath Already Exists!");

result = true;

} else { // Ŀ¼������

if (dirname.mkdirs()) {

System.out.println("DirPath Create Successfully!");

result = true;

} else {

System.out.println("DirPath Create Fail!");

result = false;

}

}

} catch (Exception e) {

// if any error occurs

e.printStackTrace();

}

return result;

}

// 产生随机字符串

public static String getRandomString(int length) {

String string = "abcdefghijklmnopqrstuvwxyz";

StringBuffer sb = new StringBuffer();

int len = string.length();

for (int i = 0; i < length; i++) {

sb.append(string.charAt((int) Math.round(Math.random() * (len - 1))));

}

return sb.toString();

}

// 写入文件

public static void CreateFile(String dirpath, int filenum) {

String[] num = new String[filenum];

for (int i = 0; i < filenum; i++) {

num[i] = getRandomString(3);

String filepath = dirpath + "\\" + num[i] + ".txt";

File file = new File(filepath);

try {

file.createNewFile();

} catch (IOException e) {

e.printStackTrace();

}

try {

FileWriter fw = new FileWriter(file, true);

BufferedWriter bw = new BufferedWriter(fw);

// 文件行数

int rownum = (int) (1 + Math.random() * 1000);

for (int j = 0; j < rownum; j++) {

// 每一行随机字符串的长度

int rownum2 = (int) (1 + Math.random() * 100);

String filetext = getRandomString(rownum2);

bw.write(filetext);

bw.newLine();

}

bw.flush();

bw.close();

fw.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner input = new Scanner(System.in);

String path = input.next();

int filenum = input.nextInt();

if (TestFilePath(path)) {

CreateFile(path, filenum);

System.out.println("Files Create Successfully!");

}

}

}