页面
<h2>上传文件sss</h2> <form action="/file/upload" method="post" enctype="multipart/form-data" > <!--<input type="file" name="myfile" method="post" action="localfile/upload"/><br>--> <!--<input type="submit" value="提交"/>--> <input type="file" name="myfile"/><br/> <input type="submit" value="提交"/> </form> <h1>文件下载</h1> <a href="/file/download">下载</a>
controller:
package com.springboot2.thyemleaf.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.multipart.MultipartFile; import javax.servlet.http.HttpServletResponse; import java.io.*; import java.util.UUID; /** * Created by lpw'ASUS on 2018/5/30. */ @Controller @RequestMapping("/file") public class MyfileCOntroller { @RequestMapping("upload") @ResponseBody public String getfile(@RequestParam("myfile") MultipartFile file){ System.out.println("file name = "+file.getOriginalFilename()); // 获取文件名 String fileName = file.getOriginalFilename(); // 获取后缀 String suffixName = fileName.substring(fileName.lastIndexOf(".")); // 文件上产的路径 String filePath = "d:/upload/"; // fileName处理 fileName = filePath+ UUID.randomUUID()+fileName; // 文件对象 File dest = new File(fileName); // 创建路径 if(!dest.getParentFile().exists()){ dest.getParentFile().mkdir(); } try { file.transferTo(dest); return "上传成功"; } catch (IOException e) { e.printStackTrace(); } return "上传失败"; } @RequestMapping("download") public void download(HttpServletResponse response) throws FileNotFoundException { File file =new File("C:\\Users\\ASUS\\Desktop\\spring-boot-reference.pdf"); FileInputStream fileInputStream=new FileInputStream(file); // 设置被下载而不是被打开 response.setContentType("application/gorce-download"); // 设置被第三方工具打开,设置下载的文件名 response.addHeader("Content-disposition","attachment;fileName=spring-boot-reference.pdf"); try { OutputStream outputStream = response.getOutputStream(); byte[] bytes = new byte[1024]; int len = 0; while ((len = fileInputStream.read(bytes))!=-1){ outputStream.write(bytes,0,len); } } catch (IOException e) { e.printStackTrace(); } } }
设置上传的大小
application.properties
#最大文件大小。值可以使用后缀“MB”或“KB”。指示兆字节或千字节大小。 spring.servlet.multipart.max-file-size=10MB # 最大请求大小可以是mb也可以是kb spring.servlet.multipart.max-request-size=10MB