Spring boot 实现单个或批量文件上传功能

Spring boot 实现单个或批量文件上传功能

一：添加依赖：

org.springframework.boot

spring-boot-starter-thymeleaf

javax.servlet

jstl

org.apache.tomcat.embed

tomcat-embed-jasper

二：application.xml配置文件路径：

#配置上传文件地址

image.location.path=f:/image/

#配置文件大小限制

spring.http.multipart.maxFileSize=100Mb

spring.http.multipart.maxRequestSize=100Mb

#静态页面的访问配置

spring.thymeleaf.cache=false

spring.thymeleaf.prefix=classpath:/templates/

spring.thymeleaf.check-template-location=true

spring.thymeleaf.suffix=.html

spring.thymeleaf.encoding=UTF-8

spring.thymeleaf.content-type=text/html

spring.thymeleaf.mode=HTML5

三：编写静态页面（src/main/resources下建文件夹static（static存放静态文件，比如 css、js、image…）和templates（存放静态页面）两个是同级目录），先在templates 中新建一个 uploadimg.html。

图片

四：编写Controller层：

package com.hot.analysis.controller.file;

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.util.Date;

import java.util.Random;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.web.bind.annotation.PostMapping;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.bind.annotation.RestController;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.servlet.ModelAndView;

import com.hot.analysis.exception.MyException;

@RestController

public class FileUploadController {

//获取配置文件的路径

@Value("${image.location.path}")

private String resourceDir;

/**

* 实现文件上传

* */

@RequestMapping(value = "/index")

public ModelAndView toIndex() {

ModelAndView mv = new ModelAndView("uploadimg");

return mv;

}

//单个文件上传

@RequestMapping("/dc/fileUpload")

@ResponseBody

public String fileUpload( MultipartFile file){

// 获取上传文件路径

String uploadPath = file.getOriginalFilename();

// 获取上传文件的后缀

String fileSuffix = uploadPath.substring(uploadPath.lastIndexOf(".") + 1, uploadPath.length());

if (fileSuffix.equals("apk")) {

uploadPath = resourceDir;

} else {

// 上传目录地址

// String uploadpath="E:/hot-manage/image/";//windows路径

uploadPathttp://h =resourceDir;// liux路劲

}

// 上传文件名

String fileName = new Date().getTime() + new Random().nextInt(100) + "." + fileSuffix;

File savefile = new File(uploadPath + fileName);

if (!savefile.getParentFile().exists()) {

savefile.getParentFile().mkdirs();

}

try {

file.transferTo(savefile);

} catch (IllegalStateException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

if (fileSuffix.equals("apk")) {

return "/apk/" + fileName;

} else {

return "/image/" + fileName;

}

}

// 批量上传

@PostMapping("/dc/moreFileUpload")

public String bacthFileUpload(MultipartFile[] file) throws MyException {

StringBuffer buffer = new StringBuffer();

for (MultipartFile multipartFile : file) {

String str = fileUpload(multipartFile);

buffer.append(str);

buffer.append(",");

}

String all = buffer.substring(0, buffer.length() - 1);

return all;

}

// 删除文件

@PostMapping("/dc/deleteFile")

public String delFile(String path) {

String resultInfo = null;

int lastIndexOf = path.lastIndexOf("/");

String sb = path.substring(lastIndexOf + 1, path.length());

sb = "f:/image/" + sb;

File file = new File(sb);

if (file.exists()) {

if (file.delete()) {

resultInfo = "1-删除成功";

} else {

resultInfo = "0-删除失败";

}

} else {

resultInfo = "文件不存在！";

}

return resultInfo;

}

//文件下载相关代码

@RequestMapping("/download")

public String downloadFile(HttpServletRequest request, HttpServletResponse response) {

String fileName = "aim_test.txt";// 设置文件名，根据业务需要替换成要下载的文件名

if (fileName != null) {

//设置文件路径

String realPath = "D://aim//";

File file = new File(realPath , fileName);

if (file.exists()) {

response.setContentType("application/force-download");// 设置强制下载不打开

response.addHeader("Content-Disposition", "attachment;fileName=" + fileName);// 设置文件名

byte[] buffer = new byte[1024];

FileInputStream fis = null;

BufferedInputStream bis = null;

try {

fis = new FileInputStream(file);

bis = new BufferedInputStream(fis);

OutputStream os = response.getOutputStream();

int i = bis.read(buffer);

while (i != -1) {

os.write(buffer, 0, i);

i = bis.read(buffer);

}

System.out.println("success");

} catch (Exception e) {

e.printStackTrace();

} finally {

if (bis != null) {

try {

bis.close();

} catch (IOException e) {

e.printStackTrace();

}

}

if (fis != null) {

try {

fis.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

}

return null;

}

}

测试：

成功返回路径：

查看文件夹：

总结

以上所述是给大家介绍的Spring boot 实现单个或批量文件上传功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，会及时回复大家的。在此也非常感谢大家对我们网站的支持！

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