java springboot 切割分片上传大文件

公司要做一个上传文件的功能，浏览器上传超过500m的文件会崩溃

需要切割分片上传

前端用的百度的 webuploader插件

官网 http://fex.baidu.com/webuploader/ <http://fex.baidu.com/webuploader/>

用的springboot

打开后页面为这样



上传文件，我上传的事一个338m的文件，切割为每个32m的文件



上传后，切割为11份，



上传成功后，合并11文件为一个文件，并将11个文件删除



源码地址：

csdn https://download.csdn.net/download/qq_34874784/10743990
<https://download.csdn.net/download/qq_34874784/10743990>

码云：https://gitee.com/c1henye/springboot-study
<https://gitee.com/c1henye/springboot-study>

 

项目结构为



jar 只新增了commons-fileupload这一个jar

pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId>
<artifactId>springboot-bigfile</artifactId> <version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging> <name>springboot-bigfile</name> <description>Demo
project for Spring Boot</description> <parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.6.RELEASE</version> <relativePath/> <!-- lookup parent from
repository --> </parent> <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version> </properties> <repositories><!-- 代码库 -->
<repository> <id>maven-ali</id>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url> </repository>
</repositories> <dependencies> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope>
</dependency> <dependency> <groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId> <scope>test</scope>
</dependency> <dependency> <groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId> <version>1.3.3</version>
</dependency> </dependencies> <build> <plugins> <plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build>
</project>
springboot, 默认限制了上传文件最大为1m,需修改，我修改为了50m

FileConfig
package com.example.springbootbigfile; import
org.springframework.beans.factory.annotation.Value; import
org.springframework.boot.web.servlet.MultipartConfigFactory; import
org.springframework.context.annotation.Bean; import
org.springframework.context.annotation.Configuration; import
javax.servlet.MultipartConfigElement; @Configuration public class FileConfig {
/** * 文件上传配置 * * @return MultipartConfigElement */ @Bean public
MultipartConfigElement multipartConfigElement(
@Value("${multipart.maxFileSize}") String maxFileSize,
@Value("${multipart.maxRequestSize}") String maxRequestSize) {
MultipartConfigFactory factory = new MultipartConfigFactory(); // 单个文件最大
factory.setMaxFileSize(maxFileSize); // 设置总上传数据总大小
factory.setMaxRequestSize(maxRequestSize); return
factory.createMultipartConfig(); } }
application.properties
#文件上传路径 uploadFolder=D:/data/appfiles/ #单个文件最大 multipart.maxFileSize=3000MB
#设置总上传数据总大小 multipart.maxRequestSize=10000MB server.port=8088 JsonResult
package com.example.springbootbigfile; /** * 描述:
json格式数据返回对象，使用CustomJsonResultSerializer 来序列化 * @author : lijiazhi */ public
class JsonResult<T> { private String code; private String msg; private T data;
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; } public T getData() { return data; }
public void setData(T data) { this.data = data; } @Override public String
toString() { return "code=" + code + " message=" + msg + " data=" + data; }
public static <T> JsonResult<T> fail() { JsonResult<T> ret = new
JsonResult<T>(); ret.setCode("201"); ret.setMsg("失败"); return ret; } public
static <T> JsonResult<T> fail(T data) { JsonResult<T> ret = JsonResult.fail();
ret.setData(data); return ret; } public static <T> JsonResult<T>
failMessage(String msg) { JsonResult<T> ret = JsonResult.fail();
ret.setMsg(msg); return ret; } public static <T> JsonResult<T>
successMessage(String msg) { JsonResult<T> ret = JsonResult.success();
ret.setMsg(msg); return ret; } public static <T> JsonResult<T> success() {
JsonResult<T> ret = new JsonResult<T>(); ret.setCode("200"); ret.setMsg("");
return ret; } public static <T> JsonResult<T> success(T data) { JsonResult<T>
ret = JsonResult.success(); ret.setData(data); return ret; } public static <T>
JsonResult<T> http404(T data) { JsonResult<T> ret = new JsonResult<T>();
ret.setCode("404"); ret.setMsg(""); ret.setData(data); return ret; } public
static <T> JsonResult<T> http403(T data) { JsonResult<T> ret = new
JsonResult<T>(); ret.setCode("403"); ret.setMsg(""); ret.setData(data); return
ret; } }
UploadController
package com.example.springbootbigfile; import java.io.*; import
javax.servlet.http.HttpServletRequest; import
javax.servlet.http.HttpServletResponse; import
org.apache.commons.fileupload.servlet.ServletFileUpload; import
org.apache.commons.io.FileUtils; import
org.springframework.beans.factory.annotation.Value; import
org.springframework.stereotype.Controller; import
org.springframework.web.bind.annotation.RequestMapping; import
org.springframework.web.bind.annotation.ResponseBody; import
org.springframework.web.multipart.MultipartFile; @Controller public class
UploadController{ @Value("${uploadFolder}") private String filePath; private
final String MODEL="upload"; /** * 上传文件 * @param request * @param response *
@param guid * @param chunk * @param file * @param chunks */ @RequestMapping(
MODEL+ "/upload") public void bigFile(HttpServletRequest request,
HttpServletResponse response,String guid,Integer chunk, MultipartFile
file,Integer chunks){ try { boolean isMultipart =
ServletFileUpload.isMultipartContent(request); if (isMultipart) { //
临时目录用来存放所有分片文件 String tempFileDir = filePath + guid; File parentFileDir = new
File(tempFileDir); if (!parentFileDir.exists()) { parentFileDir.mkdirs(); } //
分片处理时，前台会多次调用上传接口，每次都会上传文件的一部分到后台 File tempPartFile = new File(parentFileDir,
guid + "_" + chunk + ".part");
FileUtils.copyInputStreamToFile(file.getInputStream(), tempPartFile); } } catch
(Exception e) { e.printStackTrace(); } } /** * 合并文件 * @param guid * @param
fileName * @throws Exception */ @RequestMapping( MODEL+"/merge") @ResponseBody
public JsonResult mergeFile(String guid,String fileName){ // 得到 destTempFile
就是最终的文件 try { File parentFileDir = new File(filePath + guid);
if(parentFileDir.isDirectory()){ File destTempFile = new File(filePath +
"/merge", fileName); if(!destTempFile.exists()){ //先得到文件的上级目录，并创建上级目录，在创建文件,
destTempFile.getParentFile().mkdir(); try { //创建文件
destTempFile.createNewFile(); //上级目录没有创建，这里会报错 } catch (IOException e) {
e.printStackTrace(); } } System.out.println(parentFileDir.listFiles().length);
for (int i = 0; i < parentFileDir.listFiles().length; i++) { File partFile =
new File(parentFileDir, guid + "_" + i + ".part"); FileOutputStream destTempfos
= new FileOutputStream(destTempFile, true); //遍历"所有分片文件"到"最终文件"中
FileUtils.copyFile(partFile, destTempfos); destTempfos.close(); } //
删除临时目录中的分片文件 FileUtils.deleteDirectory(parentFileDir); return
JsonResult.success(); } } catch (Exception e) { e.printStackTrace(); return
JsonResult.fail(); } return null; } }
 

html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html
xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type"
content="text/html; charset=utf-8" /> <link
href="https://cdn.staticfile.org/webuploader/0.1.5/webuploader.css"
rel="stylesheet" type="text/css" /> <script type="text/javascript"
src="http://cdn.staticfile.org/jquery/1.10.2/jquery.js"></script> <script
type="text/javascript"
src="http://cdn.staticfile.org/webuploader/0.1.5/webuploader.min.js"></script>
</head> <body> <div id="uploader" class="wu-example"> <!--用来存放文件信息--> <div
id="thelist" class="uploader-list"></div> <div class="btns"> <div
id="picker">选择文件</div> <button id="ctlBtn" class="btn
btn-default">开始上传</button> </div> </div> </body> <script
type="text/javascript"> var GUID = WebUploader.Base.guid();//一个GUID var
uploader = WebUploader.create({ // swf文件路径 swf:
'http://cdn.staticfile.org/webuploader/0.1.5/Uploader.swf', // 文件接收服务端。 server:
'./upload/upload', formData:{ guid : GUID }, // 选择文件的按钮。可选。 //
内部根据当前运行是创建，可能是input元素，也可能是flash. pick: '#picker', chunked : true, // 分片处理
chunkSize : 32 * 1024 * 1024, // 每片32M, chunkRetry : false,// 如果失败，则不重试 threads
: 1,// 上传并发数。允许同时最大上传进程数。 // 不压缩image, 默认如果是jpeg，文件上传前会压缩一把再上传！ resize: false
}); $("#ctlBtn").click(function () { uploader.upload(); }); //当文件上传成功时触发。
uploader.on( "uploadSuccess", function( file ) { $.post('./upload/merge', {
guid: GUID, fileName: file.name }, function (data) { if(data.code == 200){
alert('上传成功!'); } }); }); </script> </html>

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