SpringMVC保存文件工具类--FileUtil

保存multipart文件到本地

package com.clou.douliu.server.util;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

import net.yuanmomo.tools.util.cipher.MD5;
import net.yuanmomo.tools.util.string.StringUtil;
import net.yuanmomo.tools.util.time.DateFormatUtil.Format;
import net.yuanmomo.tools.util.time.DateUtil;

import org.springframework.web.multipart.MultipartFile;

import com.clou.douliu.server.bean.ConfigBean;

public class FileUtil {
	/**
	 * makeParentDirectory: 创建存放文件的父目录. 

	 * @author 
	 * @since JDK 1.6
	 */
	public static String makeParentDirectory(){
		//得到配置存放路径  new_icons_path=/home/dooliuManagerIcon/second
		String directory = ConfigBean.getConfigBean().getNew_icons_path();
		String dateDirectory = DateUtil.dateToString(new Date(),Format.YYYYMMDD);
		File parent = new File(directory + File.separator +dateDirectory);
		if(!parent.exists()){
			// 如果目录不存在则创建目录
			parent.mkdirs();
		}
		return parent.getAbsolutePath();
	}
	
	/**
	 * saveSharePictureList: 文件上传，保存到本地. 

	 *
	 * @author 
	 * @param pictureList
	 * @return
	 * @throws Exception 
	 * @since JDK 1.6
	 */
	public static List saveJPGList(List pictureList) throws Exception{
		List savedFileList = new ArrayList();
		// 需要保存的文件
		Iterator iter = pictureList.iterator();
		// 保存的路径
		String directory = ConfigBean.getConfigBean().getNew_icons_path();
		String dateDirectory = DateUtil.dateToString(new Date(),Format.YYYYMMDD);
		File parent = new File(directory + File.separator +dateDirectory);
		if(!parent.exists()){
			// 如果目录不存在则创建目录
			parent.mkdirs();
		}
        while (iter.hasNext()) { 
        	MultipartFile multipartFile = iter.next();
         	// 添加到返回的文件列表
        	savedFileList.add(saveJPGFile(multipartFile,parent.getAbsolutePath()));
        }
        return savedFileList;
	}
	
	/**
	 * saveFile: 保存单个文件. 

	 *
	 * @author 
	 * @param multipartFile
	 * @param parent
	 * @return
	 * @throws Exception
	 * @since JDK 1.6
	 */
	public static File saveFile(MultipartFile multipartFile, String parent, String extend) throws Exception {
		if(parent == null){
			// 保存文件的父目录
			parent = makeParentDirectory();
		}
		if (multipartFile == null) {
			return null;
		}
		String originalFilename = multipartFile.getOriginalFilename();
     	if(StringUtil.isNotBlank(originalFilename)){
     		int index = originalFilename.lastIndexOf(".");
     		if(index > 0){
     			extend = originalFilename.substring(index);
     		}
     	}
     	// 生成一个随机数，保证同一时间 也不会生成相同的文件名
     	int temp = (int)Math.random() *1000;
     	String fileName = MD5.getMD5(originalFilename + temp + DateUtil.dateToString(new Date(),Format.YYYY_MM_DD_HH_MM_SS_SSS));
     	String savePath = parent +File.separator + fileName + extend;
		File localFile = new File(savePath);
		try {
			multipartFile.transferTo(localFile);
			return localFile;
		} catch (IllegalStateException e) {
			throw e;
		} catch (IOException e) {
			throw e;
		}
	}
	
	
	/**
	 * saveFile: 保存文件集合. 

	 *
	 * @author denghuahui
	 * @param multipartFiles
	 * @param parent
	 * @return
	 * @throws Exception
	 * @since JDK 1.6
	 */
	public static List saveFileList(List multipartFiles, String parent, String extend) throws Exception {
		List files  = new ArrayList<>();
		if(parent == null){
			// 保存文件的父目录
			parent = makeParentDirectory();
		}
		if (multipartFiles == null ||  multipartFiles.size()<=0) {
			return null;
		}
		
		for(MultipartFile multipartFile : multipartFiles){
			String originalFilename = multipartFile.getOriginalFilename();
	     	if(StringUtil.isNotBlank(originalFilename)){
	     		int index = originalFilename.lastIndexOf(".");
	     		if(index > 0){
	     			extend = originalFilename.substring(index);
	     		}
	     	}
	     	// 生成一个随机数，保证同一时间 也不会生成相同的文件名
	     	int temp = (int)Math.random() *1000;
	     	String fileName = MD5.getMD5(originalFilename + temp + DateUtil.dateToString(new Date(),Format.YYYY_MM_DD_HH_MM_SS_SSS));
	     	String savePath = parent +File.separator + fileName + extend;
			File localFile = new File(savePath);
			try {
				multipartFile.transferTo(localFile);
				files.add(localFile);
			} catch (IllegalStateException e) {
				throw e;
			} catch (IOException e) {
				throw e;
			}
		}
		return files;
	}
	
	/**
	 * saveFile: 保存单个文件. 

	 *
	 * @author 
	 * @param multipartFile
	 * @param savePath
	 * @return
	 * @throws Exception
	 * @since JDK 1.6
	 */
	public static File saveJPGFile(MultipartFile multipartFile, String parent) throws Exception {
		return saveFile(multipartFile,parent,".jpg");
	}
	/**
	 * saveFile: 保存单个文件. 

	 *
	 * @author 
	 * @param multipartFile
	 * @param savePath
	 * @return
	 * @throws Exception
	 * @since JDK 1.6
	 */
	public static File saveJPGFile(MultipartFile multipartFile) throws Exception {
		return saveFile(multipartFile,null,".jpg");
	}
	
	
	/**
	 * 保存单个amr（系统语音问题文件）
	 * @param multipartFile
	 * @return
	 * @throws Exception
	 */
	public static File saveAmrFile(MultipartFile multipartFile) throws Exception {
		return saveFile(multipartFile,null,".amr");
	}
	
	/**
	 * saveFile: 保存文件集合. 

	 * @param multipartFile
	 * @param savePath
	 * @return
	 * @throws Exception
	 * @since JDK 1.6
	 */
	public static List saveJPGFileList(List multipartFiles) throws Exception {
		return saveFileList(multipartFiles,null,".jpg");
	}
	
	/**
	 * saveFile: 保存音频文件. 

	 *
	 * @author 
	 * @param multipartFile
	 * @param savePath
	 * @return
	 * @throws Exception
	 * @since JDK 1.6
	 */
	public static File saveAMRFile(MultipartFile multipartFile, String parent) throws Exception {
		return saveFile(multipartFile,parent,".amr");
	}
	/**
	 * saveFile: 保存音频文件. 

	 *
	 * @author 
	 * @param multipartFile
	 * @param savePath
	 * @return
	 * @throws Exception
	 * @since JDK 1.6
	 */
	public static File saveAMRFile(MultipartFile multipartFile) throws Exception {
		return saveFile(multipartFile,null,".amr");
	}
}