Spring boot 实现单个或批量文件上传功能

Z时代
2024-01-10
分类：综合

一：添加依赖：


<!-- thymeleaf模板插件 -->
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
  </dependency>
   <!-- jsp依赖 -->
<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>jstl</artifactId>
</dependency>
<dependency>
  <groupId>org.apache.tomcat.embed</groupId>
  <artifactId>tomcat-embed-jasper</artifactId>
  <!--<scope>provided</scope>-->
</dependency>

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。


<!DOCTYPE html>
<html>
 <head>
  <title>uploadimg.html</title>
  <meta name="keywords" content="keyword1,keyword2,keyword3"></meta>
  <meta name="description" content="this is my page"></meta>
  <meta name="content-type" content="text/html; charset=UTF-8"></meta>
  <!--<link rel="stylesheet" type="text/css" href="./styles.css" rel="external nofollow" >-->
 </head>
 <body>
 <form enctype="multipart/form-data" method="post" action="/dc/fileUpload">
  图片<input type="file" name="file"/>
  <input type="submit" value="上传"/>
  </form>
 </body>
</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;
 /**
   * 实现文件上传
   * */
 @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;
  }
  }