在SSM基础上完成了文件上传与下载

package com.tu.controller; import java.io.File; import java.io.IOException; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; import org.apache.commons.io.FileUtils; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import org.springframework.http.MediaType; import org.springframework.http.ResponseEntity; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.servlet.ModelAndView; import com.tu.service.UserService; @Controller public class UserController { @Resource private UserService userService; @RequestMapping("/home") private ModelAndView init(HttpServletRequest request){ ModelAndView mv = new ModelAndView(); List<Map<String,Object>> user = userService.getAll(); mv.addObject("user",user); mv.setViewName("index"); return mv; } @RequestMapping("/index/load") private @ResponseBody List<Map<String,Object>> requestJson(@RequestBody Map<String, Object> map){ List<Map<String,Object>> list = userService.getAll(); return list; } @RequestMapping("/register") private @ResponseBody Map<String,Object> register(@RequestBody Map<String, Object> map){ return userService.addUser(map); } @RequestMapping("/deleteuser") private @ResponseBody Map<String,Object> delete(@RequestBody Map<String, Object> map){ int num = userService.delete(map); Map<String, Object> state = new HashMap<String, Object>(); state.put("result", num); return state; } @RequestMapping("/update") private @ResponseBody Map<String,Object> update(@RequestBody Map<String, Object> map){ int num = userService.update(map); Map<String, Object> state = new HashMap<String, Object>(); state.put("result", num); return state; } @RequestMapping("upload") public ModelAndView uploadFile(@RequestParam MultipartFile[] uploadFile,HttpSession session){ //获取上传文件名 for (int i = 0; i < uploadFile.length; i++) { String filename = uploadFile[i].getOriginalFilename(); //获取WebRoot下的images文件夹的绝对路径作为前半部分路径 String leftPath = session.getServletContext().getRealPath("/images"); //将文件的前半部分路径与文件名拼接 File file = new File(leftPath, filename); try { uploadFile[i].transferTo(file); } catch (IllegalStateException | IOException e) { e.printStackTrace(); } } ModelAndView mv = new ModelAndView(); mv.setViewName("index"); return mv; } @RequestMapping("/download") public ResponseEntity<byte[]> downFile() throws IOException{ File file = new File("C:\\Users\\TU\\workspace\\.metadata\\.plugins\\org.eclipse.wst.server.core\\tmp0\\wtpwebapps\\SSM_beta1\\images\\456.png"); HttpHeaders headers = new HttpHeaders(); String filename = new String("helloWorld.png".getBytes("UTF-8"),"iso-8859-1"); //设置文件名 headers.setContentDispositionFormData("attachment", filename); //以文件下载的形式来输出流 headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file), headers, HttpStatus.CREATED); } }