Java Springboot+VUE前后端分离网上手机商城平台系统设计和实现以及论文报告

package com.system.controller;
import com.system.po.FileVO;
import com.system.service.FileService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.util.UUID;
/**
 * 文件上传下载
 */
@Controller
@RequestMapping("/file")
public class FileController {
    @Resource(name = "fileServiceImpl")
    private FileService fileService;
    @RequestMapping("/upload")
    public String  fileUpload(@RequestParam MultipartFile file, FileVO filevo, HttpServletRequest request) throws IOException {
        //上传路径保存设置
        // 把文件写到磁盘
        String fileName = file.getOriginalFilename();
        String[] str = fileName.split("\\.");
        String uuid = UUID.randomUUID().toString().replaceAll("-","");
        String headPath = "E://upload/" + uuid+ "."+str[str.length-1];
        File dest = new File(headPath);
        file.transferTo(dest);
        filevo.setFileID(uuid);
        filevo.setFilePath(headPath);
        filevo.setUserID(null);
        try {
            fileService.save(filevo);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "redirect:/admin/showFile";
    }
    @RequestMapping("/downFile")
    public void down(HttpServletRequest request, HttpServletResponse response,String fileID) throws Exception{
        FileVO fileVO = fileService.findById(fileID);
        String fileName = fileVO.getFilePath();
        String[] str = fileName.split("\\.");
        InputStream bis = new BufferedInputStream(new FileInputStream(new File(fileName)));
        String filename =  fileVO.getFileName()+"\\."+str[str.length-1];
        filename = URLEncoder.encode(filename,"UTF-8");
        response.addHeader("Content-Disposition", "attachment;filename=" + filename);
        response.setContentType("multipart/form-data");
        BufferedOutputStream out = new BufferedOutputStream(response.getOutputStream());
        int len = 0;
        while((len = bis.read()) != -1){
            out.write(len);
            out.flush();
        }
        out.close();
    }
}