spring mvc 上传代码 可运行

package cn.edu.zttc.controller; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.validation.Valid; import org.apache.commons.io.FileUtils; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.validation.BindingResult; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.bind.annotation.SessionAttributes; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.servlet.mvc.support.RedirectAttributes; import org.springframework.web.servlet.view.InternalResourceViewResolver; import cn.edu.zttc.vo.User; import cn.edu.zttc.vo.UserException; @Controller @RequestMapping("/user") @SessionAttributes("loginUser") public class UserController { private final static Map<String,User> users = new HashMap<String,User>(); public UserController() { users.put("ldh",new User("ldh","刘德华","123","123123")); users.put("zxy",new User("zxy","张学友","123","123123")); users.put("gfc",new User("gfc","郭富城","123","123123")); users.put("lm",new User("lm","黎明","123","123123")); } @RequestMapping({"/users","/"}) public String list(Model model) { model.addAttribute("users",users);//map return "user/list"; } @RequestMapping(value="/add",method=RequestMethod.GET) public String add(Model model) { model.addAttribute(new User());//User-->user return "user/add"; } @RequestMapping(value="/add",method=RequestMethod.POST) public String add(@Valid User user,BindingResult binding,@RequestParam(required=false) MultipartFile[] photos,HttpServletRequest req) throws IOException { if(binding.hasErrors()) { return "user/add"; } for(MultipartFile photo:photos) { if(photo.isEmpty()) continue; System.out.println(photo.getContentType()+","+photo.getName()+","+photo.getOriginalFilename()); String realpath = req.getSession().getServletContext().getRealPath("/resources/upload/"); System.out.println(realpath); FileUtils.copyInputStreamToFile(photo.getInputStream(), new File(realpath+"/"+photo.getOriginalFilename())); } users.put(user.getUsername(), user); return InternalResourceViewResolver.REDIRECT_URL_PREFIX+"/user/users"; } @RequestMapping(value="/{username}",method=RequestMethod.GET) public String show(@PathVariable String username,Model model) { model.addAttribute(users.get(username)); return "user/show"; } @RequestMapping(value="/{username}/update",method=RequestMethod.GET) public String update(@PathVariable String username,Model model) { model.addAttribute(users.get(username)); return "user/update"; } @RequestMapping(value="/{username}/update",method=RequestMethod.POST) public String update(@PathVariable String username,@Valid User user,BindingResult br,Model model) { if(br.hasErrors()) { return "user/update"; } users.put(username, user); return "redirect:/user/users"; } @RequestMapping(value="/{username}/delete",method=RequestMethod.GET) public String delete(@PathVariable String username) { users.remove(username); return "redirect:/user/users"; } @ResponseBody @RequestMapping(value="/{username}",params="json") public User showJson(@PathVariable String username,Model model) { System.out.println(username); return users.get(username); } @RequestMapping(value="/login",method=RequestMethod.GET) public String login() { return "user/login"; } @RequestMapping(value="/login",method=RequestMethod.POST) public String login(String username,String password,Model model) { if(!users.containsKey(username)) { throw new UserException("用户名不存在"); } if(!password.equals(users.get(username).getPassword())) { throw new UserException("用户密码不正确"); } model.addAttribute("loginUser", users.get(username)); return "redirect:/user/users"; } @ExceptionHandler(value={UserException.class}) public String handlerException(Exception ex,HttpServletRequest req) { req.setAttribute("ex",ex); return "error"; } @RequestMapping("/redir") public String redir(Model model,RedirectAttributes ra) { ra.addFlashAttribute("tttt", "吞吞吐吐"); return "redirect:/user/users"; } }