MultipartFileUtils.java

package com.lst.lc.utils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import org.springframework.web.multipart.MultipartFile;

public class MultipartFileUtils {

	/**
	 * 存储文件
	 * 将MultipartFile格式的文件存储到存储介质上，命名格式为MD5Hash(name+UNIX时间戳)
	 * 将存储的绝对路径返回
	 * @param multipartFile		待存储的文件
	 * @param path				存储的路径
	 * @return					文件的绝对路径
	 */
	public static String saveFile(MultipartFile multipartFile,String path){
		
		long unixTime = System.currentTimeMillis();
		String name = HashUtils.HashPath(multipartFile.getOriginalFilename()+unixTime);
		
		String multipartUrl = path+"/"+name;
		
		File file = null;
		try {
			file = new File(path);
			if(!file.exists()){
				file.mkdirs();
			}
			byte[] buffer = multipartFile.getBytes();
			FileOutputStream fStream = new FileOutputStream(multipartUrl);
			fStream.write(buffer);
			fStream.close();
		} catch (IOException e) {
			multipartUrl = "";
			e.printStackTrace();
		}
		return multipartUrl;
	}
	
	public static String updateFile(MultipartFile multipartFile, String path){
		removeFile(path);
		int lastIndex = path.lastIndexOf("/");
		path = path.substring(0, lastIndex);
		long unixTime = System.currentTimeMillis();
		path += HashUtils.HashPath(multipartFile.getOriginalFilename()+unixTime);
		String multipartUrl = saveFile(multipartFile, path);
		
		return multipartUrl;
	}
	
	/**
	 * 删除文件
	 * @param path	待删除的文件路径
	 */
	public static void removeFile(String path){
		File file = null;
		file = new File(path);
		if(file.exists()){
			file.delete();
		}
	}
	
	/**
	 * 删除文件夹
	 * @param file	待删除的文件夹
	 */
	public static void deleteFile(File file) {
	    File[] files = file.listFiles();
	    if (files != null)
	        for (File f : files)
	        	deleteFile(f);
	    file.delete();
	}
	
	/**
	 * 删除文件夹
	 * @param file	待删除的文件夹路径
	 */
	public static void deleteFile(String path) {
		File file = new File(path);
	    File[] files = file.listFiles();
	    if (files != null)
	        for (File f : files)
	        	deleteFile(f);
	    file.delete();
	}
}