java文件上传demo

import com.zqf.common.exception.ToUserException;
import com.zqf.common.utils.ServletUtils;
import org.apache.commons.io.IOUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;

/**

• @auth
  **/
  @Controller
  @RequestMapping("/upload")
  public class FileController {
  @RequestMapping(value = "/load",method = RequestMethod.POST)
  public void upload(HttpServletRequest req,HttpServletResponse res,@RequestParam("file") MultipartFile file){
  if(file.isEmpty()){
  throw new ToUserException("上传文件为空！");
  }
  Long time = System.currentTimeMillis();
  try {
  String orginateFileName = new String(file.getOriginalFilename().getBytes("ISO-8859-1"),"UTF-8");
  System.out.println("导入原始文件名:"+orginateFileName);
  System.out.println("导入原始文件大小:"+file.getSize());
  String fileName = time+"_"+orginateFileName;
  File localFile = new File("D://"+fileName);
  file.transferTo(localFile);
  ServletUtils.toJson(fileName,req,res);
  } catch (Exception e) {
  e.printStackTrace();
  }
  }
  @GetMapping("/downLoad")
  public void download(String id, HttpServletRequest request, HttpServletResponse response) {
  System.out.println(id);
  try (
  FileInputStream inputStream = new FileInputStream(new File("D://"+id));
  ServletOutputStream outputStream = response.getOutputStream();
  ) {
  // 声明响应类型
  response.setContentType("application/x-download");
  // 下载的文件名称
  response.addHeader("Content-Disposition", "attachment;filename="+id);
  IOUtils.copy(inputStream, outputStream);
  //ServletUtils.toJson(request,response);
  } catch (FileNotFoundException e) {
  e.printStackTrace();
  } catch (IOException e) {
  e.printStackTrace();
  }
  }
  }