package com.util;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import org.apache.commons.io.FileUtils;

import org.springframework.util.Assert;

import org.springframework.web.multipart.MultipartFile;

/**

 * 文件工具类

 * 

 * @author wanghm

 *

 */

public class FileUtil extends FileUtils {

/**

* 循环创建不存在的文件夹

* 

* @param dirPath

*/

public static void dirExistOrCreate(String dirPath){

List list = new ArrayList();

addNotExistPath(dirPath, list);

//创建不存在的文件夹

for(int i = list.size() - 1; i >= 0; i--){

boolean mkdirs = new File(list.get(i)).mkdirs();

System.out.println("文件夹[" + list.get(i) + "]创建[" + (mkdirs ? "成功" : "失败") + "]！");

}

}

/**

* 添加不存在的文件夹路径到list集合

* 

* @param dirPath

* @param list

*/

private static void addNotExistPath(String dirPath, List list){

File file = new File(dirPath);

if(!file.exists()){

if(list == null){

list = new ArrayList();

}

// System.out.println("===> " + dirPath);

list.add(dirPath);

dirPath = file.getParent();

addNotExistPath(dirPath, list);

}

}

/**

* 保存文件

* 

* @param mf

* @param fileName 如c:/a/b/c/2.txt

* @throws IOException 

* @throws IllegalStateException 

*/

public static void saveFile(MultipartFile mf, String fileName) throws IllegalStateException, IOException{

Assert.notNull(mf, "MultipartFile 为空");

if(StringUtils.isBlank(fileName)){

throw new RuntimeException("文件名为空");

}

dirExistOrCreate(new File(fileName).getParent());

mf.transferTo(new File(fileName));

}

}