<dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.2.2</version></dependency><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>1.3.2</version></dependency><dependency><groupId>portlet-api</groupId><artifactId>portlet-api</artifactId><version>1.0</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.4</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>3.8.2</version></dependency>

public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {request.setCharacterEncoding("utf-8");  response.setCharacterEncoding("utf-8"); //1、创建一个DiskFileItemFactory工厂  DiskFileItemFactory factory=new DiskFileItemFactory();//创建解析器ServletFileUpload upload=new ServletFileUpload(factory);upload.setHeaderEncoding("utf-8");factory.setSizeThreshold(1024*500);//内存极限值File linshi = new File("E:\\linshi");//暂时使用硬盘来解决内存不足的存储问题factory.setRepository(linshi);//设置过大的读取路径upload.setSizeMax(1024*1024*5);//设置最大值try {List<FileItem> items = upload.parseRequest(request);for (FileItem item : items) {  // 若是一个一般的表单域, 打印信息  if (item.isFormField()) {  String name = item.getFieldName();  String value = item.getString("utf-8");  System.out.println(name + ": " + value);}  // 若是文件域则把文件保存到 e:\\files 目录下.  else {  String fileName = item.getName();  InputStream in = item.getInputStream(); fileName=(new Date()).getTime()+"";String fileUrl = "E:/files/" + fileName+".docx";//文件最终上传的位置
                       OutputStream out = new FileOutputStream(fileUrl);int len=0;byte buffer[] = new byte[1024];//字节流保护文档的完整.不可以使用高级流while((len=in.read(buffer))>0){out.write(buffer, 0, len);}out.close();  in.close();  }  }  } catch (FileUploadException e) {// TODO Auto-generated catch block
            e.printStackTrace();} }