spring 文件上传

package com.theone.web;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.util.ArrayList;import java.util.List;import java.util.Map;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.util.FileCopyUtils;import org.springframework.validation.BindException;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.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import org.springframework.web.multipart.commons.CommonsMultipartFile;import org.springframework.web.servlet.ModelAndView;/** *  * @author Administrator at 2012-12-26下午08:03:58 * @Email [e-mail] * @QQ 386115312 */@Controllerpublic class FileUploadController {@RequestMapping(value = "/upload", method = RequestMethod.POST)public ModelAndView upload(HttpServletRequest request,HttpServletResponse response)throws Exception {MultipartHttpServletRequest multipartHttpServletRequest = (MultipartHttpServletRequest) request;CommonsMultipartFile file = (CommonsMultipartFile) multipartHttpServletRequest.getFile("file");String name = multipartHttpServletRequest.getParameter("name");System.out.println("文件名为：" + name);String fileName = file.getOriginalFilename();String path = request.getSession().getServletContext().getRealPath("/")+ "images/";File dirFile = new File(path);if (!dirFile.exists()) {dirFile.mkdir();}File uploadFile = new File(path + fileName);FileCopyUtils.copy(file.getBytes(), uploadFile);request.setAttribute("files", loadFiles(request));return new ModelAndView("success");}@RequestMapping(value = "/upload2", method = RequestMethod.POST)public ModelAndView onSubmit2(HttpServletRequest request,HttpServletResponse response, BindException errors)throws Exception { // 转型为MultipartHttpRequestMultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;// 根据前台的name名称得到上传的文件MultipartFile file = multipartRequest.getFile("file"); // 获得文件名String realFileName = file.getOriginalFilename();// 获取路径String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "images\\";// 创建文件File dirPath = new File(ctxPath);if (!dirPath.exists()) {dirPath.mkdir();}File uploadFile = new File(ctxPath + realFileName);FileCopyUtils.copy(file.getBytes(), uploadFile);request.setAttribute("files", loadFiles(request));return new ModelAndView("success");}@RequestMapping(value = "/upload3", method = RequestMethod.POST)public String upload(@RequestParam("file") MultipartFile image,HttpServletRequest request) throws IOException {String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "images\\";System.out.println("路径" + ctxPath);File file = new File(ctxPath + "/" + image.getOriginalFilename());FileCopyUtils.copy(image.getBytes(),new File(ctxPath + "/" + image.getOriginalFilename()));try {image.transferTo(file);// 保存上传的文件} catch (IllegalStateException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}request.setAttribute("files", loadFiles(request));return "success";}@RequestMapping(value = "/upload4", method = RequestMethod.POST)public ModelAndView fileUpload(HttpServletRequest request,HttpServletResponse response)throws Exception {MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "images\\";File file = new File(ctxPath);if (!file.exists()) {file.mkdir();}String fileName = null;for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()) {// 上传文件名 //System.out.println("key: " + entity.getKey());MultipartFile mf = entity.getValue();fileName = mf.getOriginalFilename();File uploadFile = new File(ctxPath + fileName);FileCopyUtils.copy(mf.getBytes(), uploadFile);}request.setAttribute("files", loadFiles(request));return new ModelAndView("success");}@RequestMapping("/download/{fileName}")public ModelAndView download(@PathVariable("fileName") String fileName,HttpServletRequest request, HttpServletResponse response)throws Exception {response.setContentType("text/html;charset=utf-8");java.io.BufferedInputStream bis = null;java.io.BufferedOutputStream bos = null;String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "images\\";String downLoadPath = ctxPath + fileName;System.out.println(downLoadPath);try {long fileLength = new File(downLoadPath).length();response.setContentType("application/x-msdownload;");response.setHeader("Content-disposition", "attachment; filename="+ new String(fileName.getBytes("utf-8"), "ISO8859-1"));response.setHeader("Content-Length", String.valueOf(fileLength));bis = new BufferedInputStream(new FileInputStream(downLoadPath));bos = new BufferedOutputStream(response.getOutputStream());byte[] buff = new byte[2048];int bytesRead;while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {bos.write(buff, 0, bytesRead);}} catch (Exception e) {e.printStackTrace();} finally {if (bis != null)bis.close();if (bos != null)bos.close();}return null;}public List<String> loadFiles(HttpServletRequest request) {List<String> files = new ArrayList<String>();String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "images\\";File file = new File(ctxPath);if (file.exists()) {File[] fs = file.listFiles();String fname = null;for (File f : fs) {if (f.isFile()) {fname=f.getName();files.add(fname);}}}return files;}}