/**

 *

 * 上传文件

 *

 */

public class FileUploadServlet2 extends HttpServlet {

    protected void doGet(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        try {

            // 1.创建磁盘文件项工厂----这里的temp为临时文件目录

            String path_temp = this.getServletContext().getRealPath("temp");

            DiskFileItemFactory factory = new DiskFileItemFactory(1024 * 1024, new File(path_temp));

            // 2.创建文件上传的核心类

            ServletFileUpload upload = new ServletFileUpload(factory);

            // 设置上传文件名的编码----以防文件名乱码

            upload.setHeaderEncoding("utf-8");

            // ServletFileUpload的API

            boolean multipartContent = upload.isMultipartContent(request);// 判断表单是否是文件上传的表单

            if (multipartContent) {

                // 是文件上传的表单

                // **解析request获得文件项集合

                List<FileItem> parseRequest = upload.parseRequest(request);

                if (parseRequest!=null) {

                    for (FileItem item : parseRequest) {

                        //判断是不是一个普通表单项

                        boolean formField = item.isFormField();

                        if (formField) {

                            //普通表单项

                            String fieldName = item.getFieldName();

                            String fieldValue = item.getString("UTF-8");//对普通表单项的内容编码

                        } else {

                            //获取文件名

                            String fileName = item.getName();

                            //得到输入流

                            InputStream in = item.getInputStream();

                            //获取文件存放路径

                            String path = this.getServletContext().getRealPath("upload");

                            //将文件存入相应目录

                            OutputStream out = new FileOutputStream(path+"/"+fileName);

                            IOUtils.copy(in, out);

                            in.close();

                            out.close();

                            //最后删除temp目录下的临时文件、

                            item.delete();

                        }

                    }

                }

            } else {

                // 非文件上传表单，用原始获取方式request.getParameter("表单name");

            }

        } catch (FileUploadException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        doGet(request, response);

    }

}