SpringMVC保存文件工具类--FileUtil

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. <br/>
* @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. <br/>
*
* @author
* @param pictureList
* @return
* @throws Exception
* @since JDK 1.6
*/
public static List<File> saveJPGList(List<MultipartFile> pictureList) throws Exception{
List<File> savedFileList = new ArrayList<File>();
// 需要保存的文件
Iterator<MultipartFile> 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. <br/>
*
* @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. <br/>
*
* @author denghuahui
* @param multipartFiles
* @param parent
* @return
* @throws Exception
* @since JDK 1.6
*/
public static List<File> saveFileList(List<MultipartFile> multipartFiles, String parent, String extend) throws Exception {
List<File> 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. <br/>
*
* @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. <br/>
*
* @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. <br/>
* @param multipartFile
* @param savePath
* @return
* @throws Exception
* @since JDK 1.6
*/
public static List<File> saveJPGFileList(List<MultipartFile> multipartFiles) throws Exception {
return saveFileList(multipartFiles,null,".jpg");
}

/**
* saveFile: 保存音频文件. <br/>
*
* @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. <br/>
*
* @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");
}
}