版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/haohao123nana/article/details/54692669
继上次大文件分块上传原理见：http://blog.csdn.net/haohao123nana/article/details/51279098，博主终于有时间来真正的代码实现它。
关键部分
- 前端用file.slice()分块
- 前端用FileReader获取每一分块的md5值
- 后端用MultipartFile接受分块文件
- 后端用FileOutputStream拼装分块文件
话不多说，直接上代码，我想这是你们最喜欢的
html
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>HTML5大文件分片上传示例</title>
<script src="http://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script src="md5.js"></script>
<script>
var i = -1;
var succeed = 0;
var databgein; //开始时间
var dataend; //结束时间
var action=false; //false检验分片是否上传过(默认); true上传文件
var page = {
init: function(){
$("#upload").click(function(){
databgein=new Date();
var file = $("#file")[0].files[0]; //文件对象
isUpload(file);
});
}
};
$(function(){
page.init();
});
function isUpload (file) {
//构造一个表单，FormData是HTML5新增的
var form = new FormData();
var r = new FileReader();
r.readAsBinaryString(file);
$(r).load(function(e){
var bolb = e.target.result;
var md5 = hex_md5(bolb);
form.append("md5", md5);
//Ajax提交
$.ajax({
url: "http://localhost:8080//bookQr/test/isUpload",
type: "POST",
data: form,
async: true, //异步
processData: false, //很重要，告诉jquery不要对form进行处理
contentType: false, //很重要，指定为false才能形成正确的Content-Type
success: function(data){
var dataObj = eval("("+data+")");
var uuid = dataObj.fileId;
var date = dataObj.date;
if (dataObj.flag == "1") {
//没有上传过文件
upload(file,uuid,md5,date);
} else if(dataObj.flag == "2") {
//已经上传部分
upload(file,uuid,md5,date);
} else if(dataObj.flag == "3") {
//文件已经上传过
alert("文件已经上传过,秒传了！！");
$("#uuid").append(uuid);
}
},error: function(XMLHttpRequest, textStatus, errorThrown) {
alert("服务器出错!");
}
});
})
}
/*
* file 文件对象
* uuid 后端生成的uuid
* filemd5 整个文件的md5
* date 文件第一个分片上传的日期(如:20170122)
*/
function upload (file,uuid,filemd5,date) {
name = file.name; //文件名
size = file.size; //总大小
var shardSize = 5 * 1024 * 1024, //以5MB为一个分片
shardCount = Math.ceil(size / shardSize); //总片数
if (i > shardCount) {
i = -1;
i = shardCount;
} else {
if(!action){
i += 1; //只有在检测分片时,i才去加1; 上传文件时无需加1
}
}
//计算每一片的起始与结束位置
var start = i * shardSize,
end = Math.min(size, start + shardSize);
//构造一个表单，FormData是HTML5新增的
var form = new FormData();
if(!action){
form.append("action", "check"); //检测分片是否上传
$("#param").append("action==check ");
}else{
form.append("action", "upload"); //直接上传分片
form.append("data", file.slice(start,end)); //slice方法用于切出文件的一部分
$("#param").append("action==upload ");
}
form.append("uuid", uuid);
form.append("filemd5", filemd5);
form.append("date", date);
form.append("name", name);
form.append("size", size);
form.append("total", shardCount); //总片数
form.append("index", i+1); //当前是第几片
var ssindex = i+1;
$("#param").append("index=="+ssindex+"<br/>");
//按大小切割文件段
var data = file.slice(start, end);
var r = new FileReader();
r.readAsBinaryString(data);
$(r).load(function(e){
var bolb = e.target.result;
var md5 = hex_md5(bolb);
form.append("md5", md5);
//Ajax提交
$.ajax({
url: "http://localhost:8080//bookQr/test/upload",
type: "POST",
data: form,
async: true, //异步
processData: false, //很重要，告诉jquery不要对form进行处理
contentType: false, //很重要，指定为false才能形成正确的Content-Type
success: function(data){
var dataObj = eval("("+data+")");
var fileuuid = dataObj.fileId;
var flag = dataObj.flag;
//服务器返回该分片是否上传过
if(!action){
if (flag == "1") {
//未上传
action = true;
} else if(dataObj.flag == "2") {
//已上传
action = false;
++succeed;
}
//递归调用
upload(file,uuid,filemd5,date);
}else{
//服务器返回分片是否上传成功
//改变界面
++succeed;
$("#output").text(succeed + " / " + shardCount);
if (i+1 == shardCount) {
dataend=new Date();
$("#uuid").append(fileuuid);
$("#usetime").append(dataend.getTime()-databgein.getTime());
} else {
//已上传成功,然后检测下一个分片
action = false;
//递归调用
upload(file,uuid,filemd5,date);
}
}
},error: function(XMLHttpRequest, textStatus, errorThrown) {
alert("服务器出错!");
}
});
})
}
</script>
</head>
<body>
<input type="file" id="file" />
<button id="upload">上传</button>
<span id="output" style="font-size:12px">等待</span>
<span id="usetime" style="font-size:12px;margin-left:20px;">用时</span>
<span id="uuid" style="font-size:12px;margin-left:20px;">uuid==</span>
<br/>
<br/>
<br/>
<br/>
<span id="param" style="font-size:12px;margin-left:20px;">param==</span>
</body>
</html>
controller
package com.yxtech.sys.controller;
import com.yxtech.common.Constant;
import com.yxtech.sys.domain.FileRes;
import com.yxtech.sys.service.FileResService;
import com.yxtech.sys.service.ResService;
import com.yxtech.utils.file.FileMd5Util;
import com.yxtech.utils.file.NameUtil;
import com.yxtech.utils.file.PathUtil;
import jodd.datetime.JDateTime;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import tk.mybatis.mapper.entity.Example;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* Created by Administrator on 2015/10/9.
*/
@RestController
@Scope("prototype")
@RequestMapping(value = "/test")
public class testController {
@Autowired
private FileResService fileResService;
@Autowired
private ResService resService;
/**
* 上传文件
*
* @param request
* @return
* @throws IllegalStateException
* @throws IOException
*/
@RequestMapping(value = "/upload")
public Map<String, Object> upload(
HttpServletRequest request, @RequestParam(value = "data",required = false) MultipartFile multipartFile) throws IllegalStateException, IOException, Exception {
String action = request.getParameter("action");
String uuid = request.getParameter("uuid");
String fileName = request.getParameter("name");
String size = request.getParameter("size");//总大小
int total = Integer.valueOf(request.getParameter("total"));//总片数
int index = Integer.valueOf(request.getParameter("index"));//当前是第几片
String fileMd5 = request.getParameter("filemd5"); //整个文件的md5
String date = request.getParameter("date"); //文件第一个分片上传的日期(如:20170122)
String md5 = request.getParameter("md5"); //分片的md5
//生成上传文件的路径信息，按天生成
String savePath = Constant.FILE_PATH + File.separator + date;
String saveDirectory = PathUtil.getAppRootPath(request) + savePath + File.separator + uuid;
//验证路径是否存在，不存在则创建目录
File path = new File(saveDirectory);
if (!path.exists()) {
path.mkdirs();
}
//文件分片位置
File file = new File(saveDirectory, uuid + "_" + index);
//根据action不同执行不同操作. check:校验分片是否上传过; upload:直接上传分片
Map<String, Object> map = null;
if("check".equals(action)){
String md5Str = FileMd5Util.getFileMD5(file);
if (md5Str != null && md5Str.length() == 31) {
System.out.println("check length =" + md5.length() + " md5Str length" + md5Str.length() + " " + md5 + " " + md5Str);
md5Str = "0" + md5Str;
}
if (md5Str != null && md5Str.equals(md5)) {
//分片已上传过
map = new HashMap<>();
map.put("flag", "2");
map.put("fileId", uuid);
map.put("status", true);
return map;
} else {
//分片未上传
map = new HashMap<>();
map.put("flag", "1");
map.put("fileId", uuid);
map.put("status", true);
return map;
}
}else if("upload".equals(action)){
//分片上传过程中出错,有残余时需删除分块后,重新上传
if (file.exists()) {
file.delete();
}
multipartFile.transferTo(new File(saveDirectory, uuid + "_" + index));
}
if (path.isDirectory()) {
File[] fileArray = path.listFiles();
if (fileArray != null) {
if (fileArray.length == total) {
//分块全部上传完毕,合并
String suffix = NameUtil.getExtensionName(fileName);
File newFile = new File(PathUtil.getAppRootPath(request) + savePath, uuid + "." + suffix);
FileOutputStream outputStream = new FileOutputStream(newFile, true);//文件追加写入
byte[] byt = new byte[10 * 1024 * 1024];
int len;
FileInputStream temp = null;//分片文件
for (int i = 0; i < total; i++) {
int j = i + 1;
temp = new FileInputStream(new File(saveDirectory, uuid + "_" + j));
while ((len = temp.read(byt)) != -1) {
System.out.println("-----" + len);
outputStream.write(byt, 0, len);
}
}
//关闭流
temp.close();
outputStream.close();
//修改FileRes记录为上传成功
Example example = new Example(FileRes.class);
Example.Criteria criteria = example.createCriteria();
criteria.andEqualTo("md5",fileMd5);
FileRes fileRes = new FileRes();
fileRes.setStatus(Constant.ONE);
fileResService.updateByExampleSelective(fileRes,example);
}else if(index == 1){
//文件第一个分片上传时记录到数据库
FileRes fileRes = new FileRes();
String name = NameUtil.getFileNameNoEx(fileName);
if (name.length() > 50) {
name = name.substring(0, 50);
}
fileRes.setName(name);
fileRes.setSuffix(NameUtil.getExtensionName(fileName));
fileRes.setUuid(uuid);
fileRes.setPath(savePath + File.separator + uuid + "." + fileRes.getSuffix());
fileRes.setSize(Integer.parseInt(size));
fileRes.setMd5(fileMd5);
fileRes.setStatus(Constant.ZERO);
fileRes.setCreateTime(new Date());
this.fileResService.insert(fileRes);
}
}
}
map = new HashMap<>();
map.put("flag", "3");
map.put("fileId", uuid);
map.put("status", true);
return map;
}
/**
* 上传文件前校验
*
* @param request
* @return
* @throws IOException
*/
@RequestMapping(value = "/isUpload")
public Map<String, Object> isUpload(HttpServletRequest request) throws Exception {
String md5 = request.getParameter("md5");
Example example = new Example(FileRes.class);
Example.Criteria criteria = example.createCriteria();
criteria.andEqualTo("md5", md5);
List<FileRes> list = fileResService.selectByExample(example);
Map<String, Object> map = null;
if (list == null || list.size() == 0) {
//没有上传过文件
String uuid = UUID.randomUUID().toString();
map = new HashMap<>();
map.put("flag", "1");
map.put("fileId", uuid);
map.put("date", new JDateTime().toString("YYYYMMDD"));
map.put("status", true);
} else {
FileRes fileRes = list.get(0);
//求文件上传日期
SimpleDateFormat sdf=new SimpleDateFormat("YYYYMMDD");
Date date=new Date();
String strDate=sdf.format(date);
if(fileRes.getStatus()==0){
//文件上传部分
map = new HashMap<>();
map.put("flag", "2");
map.put("fileId", fileRes.getUuid());
map.put("date",strDate);
map.put("status", true);
}else if(fileRes.getStatus()==1){
//文件上传成功
map = new HashMap<>();
map.put("flag", "3");
map.put("fileId", fileRes.getUuid());
map.put("date",strDate);
map.put("status", true);
}
}
return map;
}
}
FileMd5Util
package com.yxtech.utils.file;
import java.io.File;
import java.io.FileInputStream;
import java.math.BigInteger;
import java.security.MessageDigest;
/**
* @author cuihao
* @create 2017-01-20-15:13
*/
public class FileMd5Util {
public static final String KEY_MD5 = "MD5";
public static final String CHARSET_ISO88591 = "ISO-8859-1";
/**
* Get MD5 of one file:hex string,test OK!
*
* @param file
* @return
*/
public static String getFileMD5(File file) {
if (!file.exists() || !file.isFile()) {
return null;
}
MessageDigest digest = null;
FileInputStream in = null;
byte buffer[] = new byte[1024];
int len;
try {
digest = MessageDigest.getInstance("MD5");
in = new FileInputStream(file);
while ((len = in.read(buffer, 0, 1024)) != -1) {
digest.update(buffer, 0, len);
}
in.close();
} catch (Exception e) {
e.printStackTrace();
return null;
}
BigInteger bigInt = new BigInteger(1, digest.digest());
return bigInt.toString(16);
}
/***
* Get MD5 of one file！test ok!
*
* @param filepath
* @return
*/
public static String getFileMD5(String filepath) {
File file = new File(filepath);
return getFileMD5(file);
}
/**
* MD5 encrypt,test ok
*
* @param data
* @return byte[]
* @throws Exception
*/
public static byte[] encryptMD5(byte[] data) throws Exception {
MessageDigest md5 = MessageDigest.getInstance(KEY_MD5);
md5.update(data);
return md5.digest();
}
public static byte[] encryptMD5(String data) throws Exception {
return encryptMD5(data.getBytes(CHARSET_ISO88591));
}
/***
* compare two file by Md5
*
* @param file1
* @param file2
* @return
*/
public static boolean isSameMd5(File file1,File file2){
String md5_1= FileMd5Util.getFileMD5(file1);
String md5_2= FileMd5Util.getFileMD5(file2);
return md5_1.equals(md5_2);
}
/***
* compare two file by Md5
*
* @param filepath1
* @param filepath2
* @return
*/
public static boolean isSameMd5(String filepath1,String filepath2){
File file1=new File(filepath1);
File file2=new File(filepath2);
return isSameMd5(file1, file2);
}
public static void main(String[] args) {
// for(int i=1;i<79;i++){
// File file = new File("F:\\bookQr_SYS\\target\\bookQr\\files\\20170122\\2124b3f9-a4c8-4297-a182-6249010dcd72\\2124b3f9-a4c8-4297-a182-6249010dcd72_"+i);
File file = new File("F:\\bookQr_SYS\\target\\bookQr\\files\\20170122\\2124b3f9-a4c8-4297-a182-6249010dcd72.mp4");
String md5Str = getFileMD5(file);
System.out.println(""+md5Str.length()+" "+md5Str);
// }
}
}
NameUtil
/**
* Created by Administrator on 2015/10/12.
*/
public class NameUtil {
/**
* Java文件操作 获取文件扩展名
*/
public static String getExtensionName(String filename) {
if ((filename != null) && (filename.length() > 0)) {
int dot = filename.lastIndexOf('.');
if ((dot > -1) && (dot < (filename.length() - 1))) {
return filename.substring(dot + 1);
}
}
return filename.toLowerCase();
}
/**
* Java文件操作 获取不带扩展名的文件名
*/
public static String getFileNameNoEx(String filename) {
if ((filename != null) && (filename.length() > 0)) {
int dot = filename.lastIndexOf('.');
if ((dot > -1) && (dot < (filename.length()))) {
return filename.substring(0, dot);
}
}
return filename.toLowerCase();
}
public static void main(String[] args) {
String str = "AAAbb.jpg";
System.out.println(getExtensionName(str).toLowerCase());
System.out.println(getFileNameNoEx(str).toUpperCase());
}
}
PathUtil
import com.yxtech.sys.controller.MailController;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
/**
* Created by Administrator on 2015/10/12.
*/
public class PathUtil {
/**
*
* @param request
* @return 返回结果类似于 “F:\workSpace\bookQr\src\main\webapp\”
*/
public static String getAppRootPath(HttpServletRequest request){
//ServletActionContext.getServletContext().getRealPath("/")+"upload";
return request.getSession().getServletContext().getRealPath("/");
}
/**
*自定义文件保存路径
* @param request
*/
public static String getCustomRootPath(HttpServletRequest request){
String path = "";
Properties prop = new Properties();
InputStream in = MailController.class.getResourceAsStream("/config/jdbc.properties");
try {
prop.load(in);
path = prop.getProperty("FILE_PATH").trim();
} catch (IOException e) {
e.printStackTrace();
}
return path;
}
/**
*
* @param request
* @return http://www.qh.com:8080/projectName
*/
public static String getHttpURL(HttpServletRequest request) {
StringBuffer buff = new StringBuffer();
buff.append("http://");
buff.append(request.getServerName());
buff.append(":");
buff.append(request.getServerPort());
buff.append(request.getContextPath());
return buff.toString();
}
}
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