转：Spring Boot上传文件（带进度条） - 为你撑起一片天 - 博客园 (cnblogs.com)
配置文件
spring:
freemarker:
template-loader-path: classpath:/static/
##Spring Boot 2.x 配置上传文件大小
servlet:
multipart:
max-file-size: 500MB
max-request-size: 500MB
InfoMsg Bean##
public class InfoMsg {
private String code;
private String msg;
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}
Controller##
@Controller
@RequestMapping("/upload")
public class UploadController {
private static final String TMP_PATH = "D:/projects/tmp";
@GetMapping
public String fileUp() {
return "upload";
}
@ResponseBody
@PostMapping
public InfoMsg fileUpload(@RequestParam("uploadFile") MultipartFile file) {
InfoMsg infoMsg = new InfoMsg();
if (file.isEmpty()) {
infoMsg.setCode("error");
infoMsg.setMsg("Please select a file to upload");
return infoMsg;
}
try {
File tmp = new File(TMP_PATH, file.getOriginalFilename());
if (!tmp.getParentFile().exists()) {
tmp.getParentFile().mkdirs();
}
String[] fileInfo = getFileInfo(tmp);
File orRenameFile = createOrRenameFile(tmp, fileInfo[0], fileInfo[1]);
if (tmp.renameTo(orRenameFile)) {
file.transferTo(orRenameFile);
}else {
file.transferTo(tmp);
}
infoMsg.setCode("success");
infoMsg.setMsg("You successfully upload" + file.getOriginalFilename());
} catch (IOException e) {
infoMsg.setCode("error");
infoMsg.setMsg("Uploaded file failed");
}
return infoMsg;
}
/**
* 创建或重命名文件
* ps：sss.jpg sss(1).jpg
* @param from
* @param toPrefix
* @param toSuffix
* @return
*/
public static File createOrRenameFile(File from, String toPrefix, String toSuffix) {
File directory = from.getParentFile();
if (!directory.exists()) {
if (directory.mkdir()) {
System.out.println("Created directory " + directory.getAbsolutePath());
}
}
File newFile = new File(directory, toPrefix + toSuffix);
for (int i = 1; newFile.exists() && i < Integer.MAX_VALUE; i++) {
newFile = new File(directory, toPrefix + "(" + i + ")" + toSuffix);
}
if (!from.renameTo(newFile)) {
System.out.println("Couldn't rename file to " + newFile.getAbsolutePath());
return from;
}
return newFile;
}
/**
* 获取File的 . 前后字串
* @param from
* @return
*/
public static String[] getFileInfo(File from) {
String fileName = from.getName();
int index = fileName.lastIndexOf(".");
String toPrefix = "";
String toSuffix = "";
if (index == -1) {
toPrefix = fileName;
} else {
toPrefix = fileName.substring(0, index);
toSuffix = fileName.substring(index, fileName.length());
}
return new String[]{toPrefix, toSuffix};
}
}
页面upload.ftl 使用的是freemarker##
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
progress {
background-color: #56BE64;
}
progress::-webkit-progress-bar {
background: #ccc;
}
progress::-webkit-progress-value {
background: #56BE64;
}
percentage {
position: fixed;
left: 160px;
}
</style>
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
</head>
<body>
<h1>Spring Boot file upload example</h1>
<form id="FileuploadForm" method="POST" action="/upload" enctype="multipart/form-data">
<input type="file" name="uploadFile" id="uploadFile"/><br/>
<br/> <input type="button" id="btnUpload" value="上传文件" onclick="upload()"/>
<div id="msg"></div>
</form>
<!--进度条部分(默认隐藏)-->
<div style="display: none;" class="progress-body">
<div>
<span style=" 100px; display: inline-block; text-align: right">上传进度：</span>
<progress></progress>
<percentage>0%</percentage>
</div>
<div>
<span style=" 100px; display: inline-block; text-align: right">上传速度：</span>
<span style=" 300px;" class="progress-speed">0 M/S, 0/0M</span>
</div>
<div>
<span style=" 100px; display: inline-block; text-align: right">上传状态：</span>
<span style=" 300px;" class="progress-info">请选择文件并点击上传文件按钮</span>
</div>
</div>
<script>
// 上传文件
function upload() {
$("#msg").text("");
var checkFile = $("#uploadFile").val();
var msgInfo = "";
if (null == checkFile || "" == checkFile) {
$("#msg").text("文件为空,请选择文件!");
} else {
var formData = new FormData(document.getElementById("FileuploadForm"));
$.ajax({
type: "POST",
enctype: 'multipart/form-data',
url: '/upload',
data: formData,
cache: false,
processData: false,
contentType: false,
error: function (result) {
console.log("error");
console.log(result);
flag = false;
$("#msg").text("访问服务器错误，请重试！");
},
success: function (result) {
console.log("success");
},
xhr: function () {
var xhr = $.ajaxSettings.xhr();
if (xhr.upload) {
$("#btnUpload").attr("disabled", true);
$("#uploadFile").attr("disabled", true);
//处理进度条的事件
xhr.upload.addEventListener("progress", progressHandle, false);
//加载完成的事件
xhr.addEventListener("load", completeHandle, false);
//加载出错的事件
xhr.addEventListener("error", failedHandle, false);
//加载取消的事件
xhr.addEventListener("abort", canceledHandle, false);
//开始显示进度条
showProgress();
return xhr;
}
}
}, 'json');
}
}
var start = 0;
//显示进度条的函数
function showProgress() {
start = new Date().getTime();
$(".progress-body").