application.properties配置文件添加:java
# 上传文件总的最大值 spring.servlet.multipart.max-request-size=10MB # 单个文件的最大值 spring.servlet.multipart.max-file-size=10MB
spring.servlet.multipart.max-file-size
限制单个文件的最大值spring.servlet.multipart.max-request-size
限制上传的多个文件的总大小一、建立Controller控制类web
package com.desire.controller; import java.io.File; import java.io.IOException; import java.util.List; import javax.servlet.http.HttpServletRequest; import org.apache.log4j.Logger; 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.multipart.MultipartHttpServletRequest; @RestController @RequestMapping("/upload") public class Upload { private static final Logger LOGGER = Logger.getLogger(Upload.class); @RequestMapping("uploadFile") public String uploadFile(@RequestParam("file") MultipartFile file) { if (file.isEmpty()) { return "上传失败,请选择文件"; } String fileName = file.getOriginalFilename(); System.err.println("文件名称:" + fileName); String filePath = "D:/upload/"; System.err.println("文件保存路径:" + filePath); File dest = new File(filePath + fileName); try { file.transferTo(dest); LOGGER.info("上传成功!!!"); return "上传成功!"; } catch (IOException e) { LOGGER.error(e.toString(), e); } return "上传失败!!!"; } }
二、若是要写jsp页面验证的话,选择文件,form的enctype
为multipart/form-data
。spring
我这里直接用Postman进行验证。apache
1.打开Postmanapp
2.填写url,选择POST提交方式。jsp
3.①选择Bodyurl
②选择form-datacode
③添加KEY值:fileorm
④选择Fileblog
⑤添加VALUE
四、点击Send运行
五、输出返回值。查看上传文件。上传成功!
在Controller中添加如下方法
@RequestMapping("uploadFiles") public String uploadFiles(HttpServletRequest request) { List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("file"); System.out.println("选择了文件数::" + files.size()); String filePath = "D:/upload/"; System.err.println("文件保存路径:" + filePath); for (int i = 0; i < files.size(); i++) { MultipartFile file = files.get(i); if (file.isEmpty()) { return "上传第" + (i++) + "个文件失败!!!"; } String fileName = file.getOriginalFilename(); System.err.println("文件名称:" + fileName); File dest = new File(filePath + fileName); try { file.transferTo(dest); LOGGER.info("第" + (i + 1) + "个文件上传成功!"); } catch (IOException e) { LOGGER.error(e.toString(), e); return "上传第" + (i++) + "个文件失败!!!"; } } return "上传成功!!!"; }
选择不一样的文件。(注:总大小不要超过你设定的限制值)
查看上传结果