SpringBoot文件上传

小程序：扫一扫查出行
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复制小程序

先建工程

只勾选web和freemarker模板

最后

先看一下最终目录结构

先修改pom文件，加入common-io依赖

然后修改Application.yml文件

spring:

  freemarker:

    templateLoaderPath: classpath:/templates/

    content-type: text/html

    charset: UTF-8

    suffix: .ftl

然后新建一个controller

package com.example.demo.controller;

import org.apache.commons.io.FileUtils;

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 org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;

import java.io.File;

import java.io.IOException;

@RestController

public class FileController {

    @RequestMapping("/index")

    public ModelAndView index(){

        ModelAndView mv = new ModelAndView("index");

        return mv;

    }

    @RequestMapping("/upload")

    public String upload(HttpServletRequest request, @RequestParam("myFile")MultipartFile file) throws IOException {

        if (file.isEmpty()) return "No File";

        String name = file.getOriginalFilename();

        System.out.println("FileName:" + name);

        String fileType = name.substring(name.lastIndexOf("."));

        System.out.println("FileType:" + fileType);

        String size = FileUtils.byteCountToDisplaySize(file.getSize());

        System.out.println("FileSize:" + size);

        String path = request.getSession().getServletContext().getRealPath("/static/img/");

        File desFile = new File(path+name);

        FileUtils.copyInputStreamToFile(file.getInputStream(), desFile);

        String info = desFile.getAbsolutePath();

        return info;

    }

}

最后新建一个页面

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>$Title$</title>

</head>

<body>

    <form method="post" action="/upload" enctype="multipart/form-data">

        <input type="file" name="myFile">

        <input type="submit" value="Upload">

    </form>

</body>

</html>

PS：这里没有启动类的事，因为启动类的上层没有任何代码（官方建议启动类放在根目录）

启动应用