ssm实现上传文件，jsp+ssm

package com.springmvc.test; import java.io.File; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; import javax.servlet.http.HttpServletRequest; 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.ui.Model; 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; /* * @Controller表示类注解 * @RequestMapping表示controller指定的URL * @RequestParam：根据参数名从URL中取得参数值 */ @Controller public class UpDownLoad { @RequestMapping("/login") public String login(@RequestParam("username") String name, @RequestParam("password") String pass, Model model) { LoginModel newModel=new LoginModel(); newModel.setName(name); newModel.setPas(pass); if(newModel.login()) { model.addAttribute("username", name); return "menu"; } else { model.addAttribute("username", name); return "index"; } } @RequestMapping("/fileupload") public String upload(@RequestParam("image") MultipartFile image , HttpServletRequest request) throws IllegalStateException, IOException { //解析路径 String imgFolder =request.getSession().getServletContext().getRealPath("/fileupload"); //解析文件名 String imgUrl = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date())+image.getOriginalFilename(); //新建file对象 File targetImg = new File(imgFolder ,imgUrl); System.out.println(targetImg+" "+imgUrl+" "+imgFolder); String type=null;// 文件类型 type=imgUrl.indexOf(".")!=-1?imgUrl.substring(imgUrl.lastIndexOf(".")+1, imgUrl.length()):null; if (type!=null) {// 判断文件类型是否为空 if ("GIF".equals(type.toUpperCase())||"PNG".equals(type.toUpperCase())||"JPG".equals(type.toUpperCase())) { //判断文件是否存在 if (!targetImg.exists()){ targetImg.mkdirs();//不存在新建 } image.transferTo(targetImg); return "upsuccess"; } } return "upfail"; } @RequestMapping("/filedownload") public ResponseEntity<byte[]> download() throws IOException { HttpHeaders headers = new HttpHeaders(); // String fileUrl="D:\\test.txt"; String fileUrl="D:\\test.jpg"; File file= new File(fileUrl); headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); String charset=new String(fileUrl.getBytes("utf-8"),"iso-8859-1"); headers.setContentDispositionFormData("file", charset); return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file), headers, HttpStatus.CREATED); } }