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  • 导入Excel扩展名是.xls 和.xlsx的

    1.首先是导入Excel2003以前（包括2003）的版本,扩展名是.xls 的


    [java] view plain copy
    1. /** 
    2.      * 操作Excel2003以前（包括2003）的版本,扩展名是.xls  
    3.      * @param templetFile 文件 
    4.      * @param startrow 开始行号 
    5.      * @param startcol 开始列号 
    6.      * @param sheetnum sheet 
    7.      * @return list 
    8.      */  
    9.     public static List<Map<String,String>> readExcelByXls(MultipartFile templetFile, int startrow, int startcol, int sheetnum) {  
    10.         List<Map<String,String>> varList = new ArrayList<Map<String,String>>();  
    11.   
    12.         try {  
    13.               
    14.             HSSFWorkbook wb = new HSSFWorkbook(templetFile.getInputStream());  
    15.             HSSFSheet sheet = wb.getSheetAt(sheetnum);                  //sheet 从0开始  
    16.             int rowNum = sheet.getLastRowNum() + 1;                     //取得最后一行的行号  
    17.   
    18.             for (int i = startrow; i < rowNum; i++) {                    //行循环开始  
    19.                   
    20.                 Map<String,String> varpd = new HashMap<String,String>();  
    21.                 HSSFRow row = sheet.getRow(i);                          //行  
    22.                 int cellNum = row.getLastCellNum();                     //每行的最后一个单元格位置  
    23.   
    24.                 for (int j = startcol; j < cellNum; j++) {               //列循环开始  
    25.           
    26.                     HSSFCell cell = row.getCell(Integer.parseInt(j + ""));  
    27.                     String cellValue = null;  
    28.                     if (null != cell) {  
    29.                         switch (cell.getCellType()) {                   // 判断excel单元格内容的格式，并对其进行转换，以便插入数据库  
    30.                         case 0:  
    31.                             if(HSSFDateUtil.isCellDateFormatted(cell)){  
    32.                                 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
    33.                                 cellValue=sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue())).toString();  
    34.                             } else {  
    35.                                 cell.setCellType(1);  
    36.                                 cellValue = cell.getStringCellValue();  
    37.                             }  
    38.                             break;  
    39.                         case 1:  
    40.                             cellValue = cell.getStringCellValue();  
    41.                             break;  
    42.                         case 2:  
    43.                             //cell.setCellType(1);  
    44.                             //cellValue = cell.getStringCellValue();  
    45.                             //cellValue = cell.getNumericCellValue() + "";  
    46.                              cellValue = String.valueOf(cell.getDateCellValue());  
    47.                             break;  
    48.                         case 3:  
    49.                             cellValue = "";  
    50.                             break;  
    51.                         case 4:  
    52.                             cellValue = String.valueOf(cell.getBooleanCellValue());  
    53.                             break;  
    54.                         case 5:  
    55.                             cellValue = String.valueOf(cell.getErrorCellValue());  
    56.                             break;  
    57.                         }  
    58.                     } else {  
    59.                         cellValue = "";  
    60.                     }  
    61.                       
    62.                     varpd.put("var"+j, cellValue);  
    63.                       
    64.                 }  
    65.                 varList.add(varpd);  
    66.             }  
    67.   
    68.         } catch (Exception e) {  
    69.             System.out.println(e);  
    70.         }  
    71.           
    72.         return varList;  
    73.     }  


    2.是操作Excel2007的版本，扩展名是.xlsx的


    [javascript] view plain copy
    1. /** 
    2.      * 是操作Excel2007的版本，扩展名是.xlsx 
    3.      * @param templetFile 文件 
    4.      * @param startrow 开始行号 
    5.      * @param startcol 开始列号 
    6.      * @param sheetnum sheet 
    7.      * @return list 
    8.      */  
    9.     public static List<Map<String,String>> readExcelByXlsx(MultipartFile templetFile, int startrow, int startcol, int sheetnum) {  
    10.         List<Map<String,String>> varList = new ArrayList<Map<String,String>>();  
    11.   
    12.         try {  
    13.               
    14.             XSSFWorkbook wb = new XSSFWorkbook(templetFile.getInputStream());  
    15.             XSSFSheet sheet = wb.getSheetAt(sheetnum);                  //sheet 从0开始  
    16.             int rowNum = sheet.getLastRowNum() + 1;                     //取得最后一行的行号  
    17.   
    18.             for (int i = startrow; i < rowNum; i++) {                    //行循环开始  
    19.                   
    20.                 Map<String,String> varpd = new HashMap<String,String>();  
    21.                 XSSFRow row = sheet.getRow(i);                          //行  
    22.                 int cellNum = row.getLastCellNum();                     //每行的最后一个单元格位置  
    23.   
    24.                 for (int j = startcol; j < cellNum; j++) {               //列循环开始  
    25.                       
    26.                     XSSFCell cell = row.getCell(Integer.parseInt(j + ""));  
    27.                     String cellValue = null;  
    28.                     if (null != cell) {  
    29.                         switch (cell.getCellType()) {                   // 判断excel单元格内容的格式，并对其进行转换，以便插入数据库  
    30.                         case 0:               
    31.                             if(HSSFDateUtil.isCellDateFormatted(cell)){  
    32.                                 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
    33.                                 cellValue=sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue())).toString();  
    34.                             } else {  
    35.                                 cell.setCellType(1);  
    36.                                 cellValue = cell.getStringCellValue();  
    37.                             }  
    38.                             break;  
    39.                         case 1:  
    40.                             cellValue = cell.getStringCellValue();  
    41.                             break;  
    42.                         case 2:  
    43.                             cellValue = cell.getStringCellValue();  
    44.                             //cellValue = cell.getNumericCellValue() + "";  
    45.                             // cellValue = String.valueOf(cell.getDateCellValue());  
    46.                             break;  
    47.                         case 3:  
    48.                             cellValue = "";  
    49.                             break;  
    50.                         case 4:  
    51.                             cellValue = String.valueOf(cell.getBooleanCellValue());  
    52.                             break;  
    53.                         case 5:  
    54.                             cellValue = String.valueOf(cell.getErrorCellValue());  
    55.                             break;  
    56.                         }  
    57.                     } else {  
    58.                         cellValue = "";  
    59.                     }  
    60.                       
    61.                     varpd.put("var"+j, cellValue);  
    62.                       
    63.                 }  
    64.                 varList.add(varpd);  
    65.             }  
    66.   
    67.         } catch (Exception e) {  
    68.             System.out.println(e);  
    69.         }  
    70.           
    71.         return varList;  
    72.     }  


    3.重点来了，结合前两个代码使用，自动识别excel版本文件

    [java] view plain copy
      1. public static List<Map<String,String>> readExcel(MultipartFile templetFile, int startrow, int startcol, int sheetnum){  
      2.         List<Map<String,String>> varList = new ArrayList<Map<String,String>>();  
      3.         if(templetFile!=null&&templetFile.getSize()>0){  
      4.             String ofn=templetFile.getOriginalFilename();// 文件名  
      5.             String extName = ""; // 扩展名格式：  
      6.             if (ofn.lastIndexOf(".") >= 0){  
      7.                 extName = ofn.substring(ofn.lastIndexOf("."));  
      8.             }  
      9.             if(".xls".equals(extName.toLowerCase())){  
      10.                 varList=readExcelByXls(templetFile,startrow,startcol,sheetnum);  
      11.             }else if(".xlsx".equals(extName.toLowerCase())){  
      12.                 varList=readExcelByXlsx(templetFile,startrow,startcol,sheetnum);  
      13.             }  
      14.         }  
      15.         return varList;  
      16.     } 
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  • 原文地址：https://www.cnblogs.com/Y-S-X/p/7995740.html
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