Java Controller下兼容xls和xlsx且可识别合并单元格的excel导入功能

1.工具类，读取单元格数据的时候，如果当前单元格是合并单元格，会自动读取合并单元格的值

 package com.shjh.core.util;
 import java.io.IOException;
 import java.io.InputStream;

 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.ss.usermodel.Cell;
 import org.apache.poi.ss.usermodel.Row;
 import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.usermodel.Workbook;
 import org.apache.poi.ss.util.CellRangeAddress;
 import org.apache.poi.xssf.usermodel.XSSFWorkbook;

 public class ExcelReaderUtil {
         private static final String EXTENSION_XLS = "xls";
         private static final String EXTENSION_XLSX = "xlsx";
         private Workbook workbook = null;
         private Sheet sheet = null;//表
         private int sheetNum = 0; // 第sheetnum个工作表

         public void setWorkbook(Workbook workbook) {
             this.workbook = workbook;
         }

         public void setSheet(Sheet sheet) {
             this.sheet = sheet;
         }

         public void setSheetNum(int sheetNum) {
             this.sheetNum = sheetNum;
         }

         public ExcelReaderUtil() {
         }

         public ExcelReaderUtil(InputStream inputStream,String fileName) throws IOException {
             if (fileName.endsWith(EXTENSION_XLS)) {
                 workbook = new HSSFWorkbook(inputStream);
             } else if (fileName.endsWith(EXTENSION_XLSX)) {
                 workbook = new XSSFWorkbook(inputStream);
             }
         }

         /**
          * 指定工作表、行、列下的内容
          *
          * @param sheetNum
          * @param rowNum
          * @param cellNum
          * @return String
          */
         public String getCellValue(int rowNum, int colNum) {
             if (sheetNum < 0 || rowNum < 0){
                 return "";
             }
             String strExcelCell = "";
             try {
                 sheet = this.workbook.getSheetAt(sheetNum);
                 //判断是否是合并单元格，如果是，就将行、列索引改为合并单元格的索引
                 for(int numMR = 0; numMR < this.sheet.getNumMergedRegions(); numMR++){
                       //获取合并单元格
                       CellRangeAddress cellRangeAddress = this.sheet.getMergedRegion(numMR);
                       int firstColumnInd = cellRangeAddress.getFirstColumn();
                       int lastColumnInd = cellRangeAddress.getLastColumn();
                       int firstRowInd = cellRangeAddress.getFirstRow();
                       int lastRowInd = cellRangeAddress.getLastRow();
                       //如果当前单元格在这个合并单元格里
                       if(rowNum >= firstRowInd && rowNum <= lastRowInd && colNum >= firstColumnInd && colNum <= lastColumnInd){
                           rowNum = firstRowInd;
                           colNum = firstColumnInd;
                           break;
                       }
                 }
                 Row row = sheet.getRow(rowNum);
                 if (row.getCell((short) colNum) != null) {
                     switch (row.getCell((short) colNum).getCellType()) {
                     case Cell.CELL_TYPE_FORMULA:
                         strExcelCell = "FORMULA ";
                         break;
                     case Cell.CELL_TYPE_NUMERIC: {
                         strExcelCell = String.valueOf(row.getCell((short) colNum).getNumericCellValue());
                     }
                         break;
                     case Cell.CELL_TYPE_STRING:
                         strExcelCell = row.getCell((short) colNum).getStringCellValue();
                         break;
                     case Cell.CELL_TYPE_BLANK:
                         strExcelCell = "";
                         break;
                     default:
                         strExcelCell = "";
                         break;
                     }
                 }
             } catch (Exception e) {
                 e.printStackTrace();
             }
             return strExcelCell;
         }

         /**
          * sheetNum下的记录行数
          *
          * @return int
          */
         public int getRowCount() {
             Sheet sheet = workbook.getSheetAt(this.sheetNum);
             int rowCount = -1;
             rowCount = sheet.getLastRowNum();
             return rowCount;
         }
 }

2.Controller内调用，尤其要注意传参部分的写法，需要加上注解，且变量名必须和jsp页面里对应的参数名要完全一致。

     @RequestMapping(value="/excelUpload")
     public void excelUpload(@RequestParam MultipartFile fileToUpload,@RequestParam String tableGroupId, HttpServletRequest request, HttpServletResponse response){
         int nullLine=0;
         String errorStr = "";
         try {
             ExcelReaderUtil readExcel = new ExcelReaderUtil(fileToUpload.getInputStream(),fileToUpload.getOriginalFilename());
             readExcel.setSheetNum(0); // 设置读取索引为0的工作表
             Map<String,String> checkRepeatMap=new HashMap<String,String>();//检验数据是否正常的集合
             List<String> tabIdList=new ArrayList<String>();//最终得到的tableid集合
             /*这里为循环校验数据*/
             for (int i = 2; i < readExcel.getRowCount()+1; i++) {
                 String error="";
                 //库名,先判断是否在合并单元格内，若有则取合并单元格的值
                 String dataName=readExcel.getCellValue(i, 0).trim();//库
                 String moduleName1=readExcel.getCellValue(i, 1).trim();//一级模块
                 String moduleName2=readExcel.getCellValue(i, 2).trim();//二级模块
                 String moduleName3=readExcel.getCellValue(i, 3).trim();//三级模块
                 //String tableChiName=rows[4]==null ? "" :rows[4].trim();//表中文名  *暂时用不上
                 String tableEnName=readExcel.getCellValue(i, 5).trim().toUpperCase();//表物理名
                 //空行校验
                 if(StringUtils.isBlank(dataName) && StringUtils.isBlank(moduleName1) && StringUtils.isBlank(moduleName2) && StringUtils.isBlank(moduleName3) && StringUtils.isBlank(tableEnName))
                 {
                     nullLine++;
                     continue;
                 }

                 //空校验
                 if(StringUtils.isBlank(tableEnName) )
                 {
                     error ="\n第"+(i+1)+"行：表物理名不能为空。\n";
                     errorStr+=error;
                     continue;
                 }
                 String mapValue=dataName+moduleName1+moduleName2+moduleName3+tableEnName;
                 if(checkRepeatMap.containsValue(mapValue)){
                     error ="\n第"+(i+1)+"行：该行数据为重复数据，请删除该行后重新提交。\n";
                     errorStr+=error;
                     continue;
                 }else{
                     checkRepeatMap.put((i+1)+"",mapValue);
                 }
                 /*各种校验*/
             }

             if (StringUtils.isNotBlank(errorStr)) {
                 int errorCount=readExcel.getRowCount()-1-tabIdList.size()-nullLine;
                 OutPutUtil.ajaxOut(response, "导入失败！有"+errorCount+"条数据存在问题，请修正后再次导入：\n"+errorStr);
             } else {
                 /*保存操作*/
             }
         } catch (Exception e) {
             //logger.error("批量导入出错："+e.getMessage().toString());
             OutPutUtil.ajaxOut(response, "批量导入出错："+e.getMessage().toString());
             e.printStackTrace();
         }
     }

3.js代码，这里需要引用  ajaxfileupload.js 插件。参数名与controller里传入的参数名要一致。

         function ajaxFileUpload(){
                      if (checkFile()) { //此函数就不贴了，就是判断一下文件后缀名是否正确
                         //弹出遮盖层
                         $("#loadingDiv").show();
                         var tableGroupId = $("#tableGroupParam").val();
                         $.ajaxFileUpload({
                              url:'<%=basePath %>userController/excelUpload.do?tableGroupId='+tableGroupId,
                              secureuri:false,
                              fileElementId:'fileToUpload', //文件选择框的id属性
                              dataType: 'text',//服务器返回的格式，可以是json
                              //相当于java中try语句块的用法
                              success:function (data, status) {
                                  //关闭遮盖层
                                  $("#loadingDiv").hide();
                                   alert(data);
                              },
                              error:function (data, status, e) {
                                  alert("导入出错："+data);
                                 }

                             });

                      }
          }

4.html代码，就是用到了file控件，没什么特别的

         <div class="easyui-dialog" id="role-jurisdiction-dlg2" data-options="title:'批量导入',closed:true" style="width:400px;height:100px;">
             <input type="hidden" id="tableGroupParam" value="0" class="input-xs" disabled="disabled">
             <div id="loadingDiv">
                 <img src="<%=basePath %>/img/loading.gif" style="margin-top:5px;margin-left:120px;" />
             </div>
             <input type="file" name="fileToUpload" id="fileToUpload" size="300" style="width:300px" onchange="checkFile();">
             <input type="button" name="btnUpload" value="上 传" id="btnUpload" style="width:60px" onclick="ajaxFileUpload();" />
         </div>