SpringBoot文件上传

Posted 2020-10-25 小LUA

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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>