springmvc_java导入excel的学习方法
网上一大堆,这里只是介绍可以用的方法,
导入excel的方法关键是springmvc的文件上传有点需要注意
springmvc的读取file
MultipartFile file = multipartRequest.getFile("file");
是需要用这个 MultipartFile
file 是取不到 的
springmvc_java导入excel的学习方法
代码如下
/** * excel批量导入客户 * @author: lyq * @date: Jun 6, 2014 10:52:21 AM * @param file * @param model * @return */ @RequestMapping(value = "addCrmManagerByExcel.php") public ModelAndView addCrmManagerByExcel(ModelMap model,HttpServletRequest request){ MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request; MultipartFile file = multipartRequest.getFile("file"); try{ this.SaveFileFromInputStream(file.getInputStream(), request.getRealPath("/upload"), "java.xls"); }catch(Exception ex){ System.out.println("上传文件失败"); ex.printStackTrace(); } File file1 = new File(request.getRealPath("/upload")+"/java.xls"); String[][] result=null; try { result = getData(file1, 1); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } if(result==null){ return null; } int rowLength = result.length; //默认从1 开始 本来是为0 剔除掉 Date date= new Date(); for(int i=0;i<rowLength;i++) { CrmManager crm =new CrmManager(); crm.setCrmCreatetime(date); crm.setCrmStatus(1); for(int j=1;j<result[i].length;j++) {//默认从1开始添加 //客户ID 客户名 客户类型 客户电话 客户状态 创建时间 放出时间 跟入时间 跟入人 放出人 //27 法规和热 特级 1212121 1 41773 2014-05-14 10:20:48.0 yq1012 //整理 id 去掉 。 创建时间 换成当前时间,,,放出时间 跟入时间 跟入人 放出人----全不要 //格式如上 // System.out.print(result[i][j]+"\t\t"); if(j==1){//客户名字 crm.setCrmName(result[i][j]); } if(j==2){//客户类型 crm.setCrmType(result[i][j]); } if(j==3){//客户电话 crm.setCrmPhone(result[i][j]); } } crmService.saveCrmUser(crm); } return ajaxDoneFile(200, "上传成功", null); }
//将MultipartFile 转换为File public static void SaveFileFromInputStream(InputStream stream,String path,String savefile) throws IOException { FileOutputStream fs=new FileOutputStream( path + "/"+ savefile); // System.out.println("------------"+path + "/"+ savefile); byte[] buffer =new byte[1024*1024]; int bytesum = 0; int byteread = 0; while ((byteread=stream.read(buffer))!=-1) { bytesum+=byteread; fs.write(buffer,0,byteread); fs.flush(); } fs.close(); stream.close(); }
/** * 读取Excel的内容,第一维数组存储的是一行中格列的值,二维数组存储的是多少个行 * @param file 读取数据的源Excel * @param ignoreRows 读取数据忽略的行数,比喻行头不需要读入 忽略的行数为1 * @return 读出的Excel中数据的内容 * @throws FileNotFoundException * @throws IOException */ public static String[][] getData(File file, int ignoreRows) throws FileNotFoundException, IOException { List<String[]> result = new ArrayList<String[]>(); int rowSize = 0; BufferedInputStream in = new BufferedInputStream(new FileInputStream( file)); // 打开HSSFWorkbook POIFSFileSystem fs = new POIFSFileSystem(in); HSSFWorkbook wb = new HSSFWorkbook(fs); HSSFCell cell = null; for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) { HSSFSheet st = wb.getSheetAt(sheetIndex); // 第一行为标题,不取 for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) { HSSFRow row = st.getRow(rowIndex); if (row == null) { continue; } int tempRowSize = row.getLastCellNum() + 1; if (tempRowSize > rowSize) { rowSize = tempRowSize; } String[] values = new String[rowSize]; Arrays.fill(values, ""); boolean hasValue = false; for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) { String value = ""; cell = row.getCell(columnIndex); if (cell != null) { // 注意:一定要设成这个,否则可能会出现乱码 cell.setEncoding(HSSFCell.ENCODING_UTF_16); switch (cell.getCellType()) { case HSSFCell.CELL_TYPE_STRING: value = cell.getStringCellValue(); break; case HSSFCell.CELL_TYPE_NUMERIC: if (HSSFDateUtil.isCellDateFormatted(cell)) { Date date = cell.getDateCellValue(); if (date != null) { value = new SimpleDateFormat("yyyy-MM-dd") .format(date); } else { value = ""; } } else { value = new DecimalFormat("0").format(cell .getNumericCellValue()); } break; case HSSFCell.CELL_TYPE_FORMULA: // 导入时如果为公式生成的数据则无值 if (!cell.getStringCellValue().equals("")) { value = cell.getStringCellValue(); } else { value = cell.getNumericCellValue() + ""; } break; case HSSFCell.CELL_TYPE_BLANK: break; case HSSFCell.CELL_TYPE_ERROR: value = ""; break; case HSSFCell.CELL_TYPE_BOOLEAN: value = (cell.getBooleanCellValue() == true ? "Y" : "N"); break; default: value = ""; } } if (columnIndex == 0 && value.trim().equals("")) { break; } values[columnIndex] = rightTrim(value); hasValue = true; } if (hasValue) { result.add(values); } } } in.close(); String[][] returnArray = new String[result.size()][rowSize]; for (int i = 0; i < returnArray.length; i++) { returnArray[i] = (String[]) result.get(i); } return returnArray; }
/** * 去掉字符串右边的空格 * @param str 要处理的字符串 * @return 处理后的字符串 */ public static String rightTrim(String str) { if (str == null) { return ""; } int length = str.length(); for (int i = length - 1; i >= 0; i--) { if (str.charAt(i) != 0x20) { break; } length--; } return str.substring(0, length); }