Spring实现文件上传(示例代码)

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

/**
 * @author typ
 *
 */
@Controller
public class UploadController {

 /**
  * 进入下载界面
  *
  * @param request
  * @param response
  * @param model
  * @return
  * @throws IOException
  */
 @RequestMapping(value = "upload_enter.do", method = RequestMethod.GET)
 public String enter(HttpServletRequest request,
   HttpServletResponse response, ModelMap model) throws IOException {
  // 进入下载界面
  return "upload";

 }

 /**
  * 具体的实现下载功能
  *
  * @param request
  * @param response
  * @param model
  * @throws IOException
  */
 @RequestMapping(value = "upload.do", method = RequestMethod.POST)
 public void upload(HttpServletRequest request,
   HttpServletResponse response, ModelMap model) throws IOException {
  MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
  // 得到上传的文件
  MultipartFile mFile = multipartRequest.getFile("file");
  // 得到上传服务器的路径
  String path = request.getSession().getServletContext()
    .getRealPath("/WEB-INF/upload/");
  // 得到上传的文件的文件名
  String filename = mFile.getOriginalFilename();
  InputStream inputStream = mFile.getInputStream();
  byte[] b = new byte[1048576];
  int length = inputStream.read(b);
  path += "\\" + filename;
  // 文件流写到服务器端
  FileOutputStream outputStream = new FileOutputStream(path);
  outputStream.write(b, 0, length);
  inputStream.close();
  outputStream.close();
 }
}