fileupload

使用common-fileupload和common-io来上传文件

1.将两个jar包倒入到工程中

2.编写上传文件的jsp页面

3.编写servlet

  protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=GBK");
        PrintWriter out = response.getWriter();

        URL url = getServletContext().getResource("/");

        RequestContext ctx = new ServletRequestContext(request);
        boolean isMultipart = ServletFileUpload.isMultipartContent(ctx);

        if(isMultipart){
            DiskFileItemFactory factory = new DiskFileItemFactory();

            factory.setSizeThreshold(1024*1024);

            ServletFileUpload upload = new ServletFileUpload(factory);

            upload.setSizeMax(1024*1024);

            List items = null;

            try{
                items = upload.parseRequest(ctx);

                for(int i=0;i<items.size();i++){
                    FileItem fi = (FileItem)items.get(i);

                    if(fi.isFormField()){
                     String name = fi.getFieldName();
                     String value = fi.getString();
                     out.println("it is a form value");

                    }else{
                        String fileName = fi.getName();
                        out.println(fileName);
                        if(null != fileName)
                        {
                            File fullFile = new File(fi.getName());
                            if(fullFile.exists()){
                                File fileOnServer = new File("c:/download",fullFile.getName());
                                fi.write(fileOnServer);
                              out.println("success");
                            }
                        }
                    }
                }
            }catch(Exception e){
                e.printStackTrace();
            }
        }
   out.close();
    } 

4.正常的表单域与文件表单域

5.参考文章

http://www.blogjava.net/sitinspring/archive/2008/04/12/192408.html

http://dev.csdn.net/develop/article/28/28913.shtm