springMVC+poi导入

深藏阁楼爱情的钟 2022-03-11 19:24 121阅读 0赞

1、jsp新加一个form表单，如图所示

![20190308145034728.png][]

2、通用的导出工具，写导出方法时直接调用这个就行，不用改

package com.minimax.code.service.hrm;
    
    import java.io.IOException;  
    import java.io.InputStream;  
    import java.text.DecimalFormat;  
    import java.text.SimpleDateFormat;  
    import java.util.ArrayList;  
    import java.util.List;  
      
    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.xssf.usermodel.XSSFWorkbook;  
      
      
    public class ImportExcelUtil {  
          
        private final static String excel2003L =".xls";    //2003- 版本的excel  
        private final static String excel2007U =".xlsx";   //2007+ 版本的excel  
          
        /** 
         * 描述：获取IO流中的数据，组装成List<List<Object>>对象 
         * @param in,fileName 
         * @return 
         * @throws IOException  
         */  
        public  List<List<Object>> getBankListByExcel(InputStream in,String fileName) throws Exception{  
            List<List<Object>> list = null;  
              
            //创建Excel工作薄  
            Workbook work = this.getWorkbook(in,fileName);  
            if(null == work){  
                throw new Exception("创建Excel工作薄为空！");  
            }  
            Sheet sheet = null;  
            Row row = null;  
            Cell cell = null;  
              
            list = new ArrayList<List<Object>>();  
            //遍历Excel中所有的sheet  
            for (int i = 0; i < work.getNumberOfSheets(); i++) {  
                sheet = work.getSheetAt(i);  
                if(sheet==null){continue;}  
                  
                //遍历当前sheet中的所有行  
                for (int j = sheet.getFirstRowNum(); j < sheet.getLastRowNum()+1; j++) {  
                    row = sheet.getRow(j);  
                    if(row==null||row.getFirstCellNum()==j){continue;}  
                      
                    //遍历所有的列  
                    List<Object> li = new ArrayList<Object>();  
                    for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {  
                        cell = row.getCell(y);  
                        li.add(this.getCellValue(cell));  
                    }  
                    list.add(li);  
                }  
            } 
            in.close();  
            return list;  
        }  
          
        /** 
         * 描述：根据文件后缀，自适应上传文件的版本  
         * @param inStr,fileName 
         * @return 
         * @throws Exception 
         */  
        public  Workbook getWorkbook(InputStream inStr,String fileName) throws Exception{  
            Workbook wb = null;  
            String fileType = fileName.substring(fileName.lastIndexOf("."));  
            if(excel2003L.equals(fileType)){  
                wb = new HSSFWorkbook(inStr);  //2003-  
            }else if(excel2007U.equals(fileType)){  
                wb = new XSSFWorkbook(inStr);  //2007+  
            }else{  
                throw new Exception("解析的文件格式有误！");  
            }  
            return wb;  
        }  
      
        /** 
         * 描述：对表格中数值进行格式化 
         * @param cell 
         * @return 
         */  
        public  Object getCellValue(Cell cell){  
            Object value = null;  
            DecimalFormat df = new DecimalFormat("0");  //格式化number String字符  
            SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd");  //日期格式化  
            DecimalFormat df2 = new DecimalFormat("0.00");  //格式化数字  
              
            switch (cell.getCellType()) {  
            case Cell.CELL_TYPE_STRING:  
                value = cell.getRichStringCellValue().getString();  
                break;  
            case Cell.CELL_TYPE_NUMERIC:  
                if("General".equals(cell.getCellStyle().getDataFormatString())){  
                    value = df.format(cell.getNumericCellValue());  
                }else if("m/d/yy".equals(cell.getCellStyle().getDataFormatString())){  
                    value = sdf.format(cell.getDateCellValue());  
                }else{  
                    value = df2.format(cell.getNumericCellValue());  
                }  
                break;  
            case Cell.CELL_TYPE_BOOLEAN:  
                value = cell.getBooleanCellValue();  
                break;  
            case Cell.CELL_TYPE_BLANK:  
                value = "";  
                break;  
            default:  
                break;  
            }  
            return value;  
        }  
    }

3、导入方法

@RequestMapping("/importexcel")    
    	public void importexcel(HttpServletRequest request,HttpServletResponse response,HttpSession session)throws Exception{
    	     MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;     
    	     HrmUserInfo addHui=(HrmUserInfo)session.getAttribute(SysConfig.USER_SESSION); 
    	     InputStream in =null;  
    	     List<List<Object>> listob = null;  
    	     MultipartFile file = multipartRequest.getFile("upfile");  
    		 SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
    	     if(file.isEmpty()){  
    	         throw new Exception("文件不存在！");  
    	     }  
    	     in = file.getInputStream();  
    	     listob = new ImportExcelUtil().getBankListByExcel(in,file.getOriginalFilename());
    	     in.close();  
    	     //该处可调用service相应方法进行数据保存到数据库中，现只对数据输出  
    	     for (int i = 0; i < listob.size(); i++) {  
    	    	  List<Object> lo = listob.get(i);  
    	    	  List<Map<String,Object>> expeEditList=iHrmUserInfoExpeEditService.selectHrmUserInfoExpeSon(122);
    		        Integer few=iHrmUserInfoExpeDao.querySequence();
    		        	for(int j=0;j<expeEditList.size();j++){
    						//key
    						String key=expeEditList.get(j).get("ID").toString();
    						//数据
    						HrmUserInfoExpe huie=new HrmUserInfoExpe();
    						huie.setId((iHrmUserInfoExpeDao.selectMaxId()+1+j+(i*4)));
    						huie.setUser_id(String.valueOf(lo.get(0)));
    						huie.setEdit_id(Integer.parseInt(key));
    						huie.setFew(few);
    						huie.setAdd_date(df.format(new Date()));
    						huie.setAdd_person(addHui.getUser_id());
    						huie.setDelete_flag("0");
    						huie.setValue(String.valueOf(lo.get(j+1)));
    						iJdbcBaseDao.saveUtil(huie);
    					}
    		    	    PrintWriter out = null;  
    		    	    response.setCharacterEncoding("utf-8");  //防止ajax接受到的中文信息乱码  
    		    	    out = response.getWriter();  
    		    	    out.print("文件导入成功！");  
    		    	    out.flush();  
    		    	    out.close();  
    	     }
    	}

[20190308145034728.png]: /images/20220311/201b89ff66c94326a5edb405d7c8a101.png