1   <h1>导入Excel</h1>2   <hr>3   <form action="importExcel" method="post" enctype="multipart/form-data">4   <input type="file" name="importExcel" id="importExcel">5   <input type="submit" value="导入">6   </form> 

  1  public class Import ExcelServlet extends HttpServlet {  2   //缓冲区域  3     File tempPathFile;  4   //默认路径  5    String uploadTo ="D:\\";  6   // 支持的文件类型  7    String[] errorType = { ".xls" };  8  //格式化日期  9     SimpleDateFormat format =new  SimpleDateFormat("yyyyMMddHHmmssSSS"); 10    @Override 11   protected void doGet(HttpServletRequest req, HttpServletResponse resp) 12   throws ServletException, IOException 13    { 14        req.setCharacterEncoding("utf-8"); 15        resp.setCharacterEncoding("utf-8"); 16         //取得服务器真实路径 17         uploadTo =    req.getSession().getServletContext().getRealPath("\\") +"upload\\"; 18         // Create a factory for disk-based file items 19         DiskFileItemFactory factory =new DiskFileItemFactory(); 20         // 设置缓冲区大小，这里是4kb 21         factory.setSizeThreshold(4096); 22         // 设置缓冲区目录 23         factory.setRepository(tempPathFile); 24         // Create a new file upload handler 25         ServletFileUpload upload =new ServletFileUpload(factory); 26         // Set overall request size constraint 27 // 设置最大文件尺寸，这里是4MB 28         upload.setSizeMax(4*1024*1024);  29         // 开始读取上传信息 30         List fileItems =new ArrayList(); 31         try 32          { 33                 fileItems = upload.parseRequest(req); 34          }  35         catch (FileUploadException e1)  36          { 37               e1.printStackTrace(); 38           } 39          // 依次处理每个上传的文件 40          Iterator iter = fileItems.iterator(); 41          System.out.println("fileItems的大小是"+ fileItems.size()); 42          // 正则匹配，过滤路径取文件名 43           String regExp =".+\\\\(.+)$"; 44           Pattern p = Pattern.compile(regExp); 45           while (iter.hasNext())  46           { 47               FileItem item = (FileItem) iter.next(); 48               // 忽略其他不是文件域的所有表单信息 49               System.out.println("正在处理"+ item.getFieldName()); 50               if (!item.isFormField()) 51                { 52                     String name = item.getName(); 53                     long size = item.getSize(); 54                     if ((name ==null|| name.equals("")) && size ==0) 55                             continue; 56                     Matcher m = p.matcher(name); 57                     boolean result = m.find(); 58                     if (result) 59                     { 60                          boolean flag =false; 61                          for (int temp =0; temp < errorType.length; temp++)  62                          { 63                               if(m.group(1).endsWith(errorType[temp])) 64                                { 65                                         flag =true; 66                                 } 67                           } 68                            if(!flag) 69                            { 70                                 System.out.println("上传了不支持的文件类型"); 71                                  thrownew IOException(name +": wrong type"); 72                            } 73                            try { 74                                     String fileName = uploadTo + format.format(new Date()) + m.group(1).substring(m.group(1).indexOf(".")); 75                                      item.write(new File(fileName)); 76                                       //调用ReadExcel类进行读出excel 77                                       ReadExcel.readExcel(fileName, resp.getWriter()); 78                                       System.out.println(name +"\t\t"+ size); 79                                   }  80                             catch (Exception e) 81                             { 82                                  e.printStackTrace(); 83                             } 84                    } 85               }  86            else  87              { 88                  // 这里添加对不是上传文件表单项的处理 89                  System.out.println("这是一个表单项"); 90              } 91          } 92        } 93     @Override 94      protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException 95       { 96            doGet(req, resp); 97       } 98     @Override 99      public  void init() throws ServletException 100      {101          tempPathFile =new File("d:\\temp\\buffer\\");102          if (!tempPathFile.exists())103          {104                tempPathFile.mkdirs();105          }106       } 107   }

 1   public class ReadExcel  2   { 3       public staticvoid readExcel(String pathname, PrintWriter out)  4       { 5           try { 6           //打开文件 7           Workbook book = Workbook.getWorkbook(new File(pathname)) ; 8            //取得第一个sheet 9           Sheet sheet = book.getSheet(0);10            //取得行数11           int rows = sheet.getRows();12           for(int i =0; i < rows; i++) 13           {14               Cell [] cell = sheet.getRow(i);15               for(int j=0; j<cell.length; j++)16               {17                  //getCell(列，行)18                  System.out.print(sheet.getCell(j, i).getContents());19                  System.out.print("&nbsp;");20               }21                  System.out.println("<br/>");22           }23           //关闭文件24           book.close();25        }26       catch (BiffException e)27       {28            e.printStackTrace();29       }30       catch (IOException e)31       {32           e.printStackTrace();33        } 34   }