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。

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;
 
 @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
    uploadPath =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

以上所述是小编给大家介绍的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，小编会及时回复大家的。在此也非常感谢大家对考高分网网站的支持！