简单的文件上传后台代码

import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigDecimal;
import java.util.Map;
import java.util.UUID;

/**

• Created by dell on 2019/8/1.
  */
  @Controller
  @RequestMapping(“test”)
  public class uploading {
  @RequestMapping(“upload”)
  public void importExcel(HttpServletRequest request, Map<String, Object> map, Integer t) {

     uploadFile(request,"");//文件上传
  

  }

  public static void uploadFile(HttpServletRequest req, String url){

       MultipartHttpServletRequest multi = (MultipartHttpServletRequest) req;
       MultipartFile file = multi.getFile("file");
  
       String fileName = file.getOriginalFilename();
  
       //String ff = fileName.substring(0, fileName.lastIndexOf("."));//文件名
       String fn = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length());//文件后缀
  
       String ft = fn.toUpperCase();
  
  
  String newFileName = UUID.randomUUID().toString() + "." + fn;
  
       url = "e:\\test";
  
       String uploadPath =  url;//文件上传位置
  
  
  
       //文件位置
       String filePath = uploadPath + newFileName;
  
       File fileSave = new File(uploadPath);
       fileSave.setWritable(true, false);
       if (!fileSave.exists()){
             fileSave.mkdirs();
       }
  
       try{
               InputStream in = file.getInputStream();
               OutputStream out = new FileOutputStream(filePath);//输出
             byte[] buffer = new byte[1024];//缓存
             int len = 0;
  
             while ((len = in.read(buffer)) > 0) {
                   out.write(buffer, 0, len);
             }
       }catch (Exception e) {
         e.printStackTrace();
       }
  

  }
  }
  简单的文件上传后台代码