java之导入excel

接口:

/**
     * 
     * Description:  导入excel表 
     * @param map
     * @param request
     * @param session
     * @return
     * @author shiqianyu
     * @throws Exception 
     * @Data 2018年3月12日 下午2:40:52
     */
    @RequestMapping("/importExcelData")
    public ModelAndView importExcelData(ModelMap map,HttpServletRequest request,HttpSession session,@RequestParam(value = "file", required = true)MultipartFile multfile) throws Exception{  
         //获取页面信息
        Map<String, String> pageCrawlValue = StringUtil.getArrayValue(request.getParameterMap());
        pageCrawlValue.put("CRAWLRESULTPATH", pageCrawlValue.get("CRAWLRESULTPATH")+File.separator+pageCrawlValue.get("PAGECRAWLNAME"));
        PageCrawlTaskManage pageCrawlTaskManage = new PageCrawlTaskManage();
        pageCrawlTaskManage.setRegx(pageCrawlValue.get("PageRegx"));
        pageCrawlTaskManage.setPage_prdfix(pageCrawlValue.get("PAGE_PRDFIX"));
        pageCrawlTaskManage.setCtCycle(pageCrawlValue.get("CTCYCLE"));
        pageCrawlTaskManage.setCrawlResultPath(pageCrawlValue.get("CRAWLRESULTPATH"));
        pageCrawlTaskManage.setProxyDeployId(pageCrawlValue.get("PROXYID"));
        pageCrawlTaskManage.setCrawlIntervalTime(Integer.valueOf(pageCrawlValue.get("CRAWL_INTERVAL_TIME")));
        pageCrawlTaskManage.setPageCrawlName(pageCrawlValue.get("PAGECRAWLNAME"));
        pageCrawlTaskManage.setIsDrill(pageCrawlValue.get("isDrill"));
        pageCrawlTaskManage.setCtCycleUnit(pageCrawlValue.get("CTCYCLEUNIT"));
        pageCrawlTaskManage.setDataSourceId(pageCrawlValue.get("DATASOURCEID"));
        pageCrawlTaskManage.setPage_start(pageCrawlValue.get("PAGE_START"));
        pageCrawlTaskManage.setPage_end(pageCrawlValue.get("PAGE_END"));
        pageCrawlTaskManage.setDescribe(pageCrawlValue.get("describe"));
        pageCrawlTaskManage.setThreadCount(pageCrawlValue.get("CTTHREADCOUNT"));
        pageCrawlTaskManage.setPage_suffix(pageCrawlValue.get("PAGE_SUFFIX"));
        
        int startRow = Integer.parseInt(pageCrawlValue.get("startRow"))-1;//导入excel 起始行号 -3
        int endRow = Integer.parseInt(pageCrawlValue.get("endRow"))-1; //导入excel 结束行号 -3
        int column = Integer.parseInt(pageCrawlValue.get("column"))-1; //导入 excel指定的列号 -1
        
        //获取页码后缀
        List<String> suffixs = new ArrayList<String>();
        
        
        //检查文件
        ExcelData.checkFile(multfile);
         //获得Workbook工作薄对象
        Workbook workbook = ExcelData.getWorkBook(multfile);
        //创建返回对象，把每行中的值作为一个数组，所有行作为一个集合返回
        List<String[]> list = new ArrayList<String[]>();
        if(workbook != null){
            for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){
                //获得当前sheet工作表
                Sheet sheet = workbook.getSheetAt(sheetNum);
                if(sheet == null){
                    continue; 
                }
                //获得当前sheet的开始行
                int firstRowNum  = startRow;
                //获得当前sheet的结束行
                int lastRowNum = endRow;
                //循环行
                for(int rowNum = firstRowNum;rowNum <= lastRowNum;rowNum++){ //firstRowNum+1;
                    //获得当前行
                    Row row = sheet.getRow(rowNum);
                    if(row == null){
                        continue;
                    }
                    //获得当前行的开始列
                    int firstCellNum = row.getFirstCellNum();
                    //获得当前行的列数
                    int lastCellNum = row.getLastCellNum();
                    String[] cells = new String[row.getLastCellNum()];
                    //循环当前行
                    for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
                        if(cellNum==column){
                            Cell cell = row.getCell(cellNum);
                            cells[cellNum] = ExcelData.getCellValue(cell);
                        }
                        
                    }
                    list.add(cells);
                }
            }
        }
        
       
        for(int i= 0;i<list.size();i++){//startRow
            String[] arr=null;
            arr = list.get(i);//[张飞, As255, c2, d2, f2]
            if(arr!=null){
                //遍历列
                for(int j=0;j<arr.length;j++){
                    if(j==column){
                        suffixs.add(arr[j]);//As255
                    }
                }
            }
        }
         
        map.put("pageCrawlTaskManage", pageCrawlTaskManage);
        map.put("times",suffixs); 
        return new ModelAndView("crawl/CrawlTaskToExcel");
    }

工具类:

package com.dimensoft.splider.util;

import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.apache.log4j.Logger;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
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;
import org.springframework.web.multipart.MultipartFile;
 

/**
 * 解析excel 上传数据
 * @author shiqianyu
 *
 */
public class ExcelData {
    
    private static final Logger log = Logger.getLogger(ExcelData.class);
    
    public static List<String[]> getExcelData(MultipartFile file) throws IOException{
        checkFile(file);
         //获得Workbook工作薄对象
        Workbook workbook = getWorkBook(file);
        //创建返回对象，把每行中的值作为一个数组，所有行作为一个集合返回
        List<String[]> list = new ArrayList<String[]>();
        if(workbook != null){
            for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){
                //获得当前sheet工作表
                Sheet sheet = workbook.getSheetAt(sheetNum);
                if(sheet == null){
                    continue; 
                }
                //获得当前sheet的开始行
                int firstRowNum  = sheet.getFirstRowNum();
                //获得当前sheet的结束行
                int lastRowNum = sheet.getLastRowNum();
                //循环除了第一行的所有行
                for(int rowNum = firstRowNum+1;rowNum <= lastRowNum;rowNum++){
                    //获得当前行
                    Row row = sheet.getRow(rowNum);
                    if(row == null){
                        continue;
                    }
                    //获得当前行的开始列
                    int firstCellNum = row.getFirstCellNum();
                    //获得当前行的列数
                    int lastCellNum = row.getLastCellNum();
                    String[] cells = new String[row.getLastCellNum()];
                    //循环当前行
                    for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
                        Cell cell = row.getCell(cellNum);
                        cells[cellNum] = getCellValue(cell);
                    }
                    list.add(cells);
                }
            }
        }
        return list;
    }

    
    /**
     * 检查文件
     * @param file
     * @throws IOException
     */
     public static  void checkFile(MultipartFile file) throws IOException{
         //判断文件是否存在
         if(null == file){
             log.error("文件不存在！");
         }
         //获得文件名
         String fileName = file.getOriginalFilename();
         //判断文件是否是excel文件
         if(!fileName.endsWith("xls") && !fileName.endsWith("xlsx")){
             log.error(fileName + "不是excel文件");
         }
     }
     
     
     public static  Workbook getWorkBook(MultipartFile file) {
         //获得文件名
         String fileName = file.getOriginalFilename();
         //创建Workbook工作薄对象，表示整个excel
         Workbook workbook = null;
         try {
             //获取excel文件的io流
             InputStream is = file.getInputStream();
             //根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象
             if(fileName.endsWith("xls")){
                 //2003
                 workbook = new HSSFWorkbook(is);
             }else if(fileName.endsWith("xlsx")){
                 //2007 及2007以上
                 workbook = new XSSFWorkbook(is);
             }
         } catch (IOException e) {
             log.error(e.getMessage());
         }
         return workbook;
     }
     
     public static String getCellValue(Cell cell){
         String cellValue = "";
         if(cell == null){
             return cellValue;
         }
     //判断数据的类型
         switch (cell.getCellType()){
             case Cell.CELL_TYPE_NUMERIC: //数字
                 cellValue = stringDateProcess(cell);
                 break;
             case Cell.CELL_TYPE_STRING: //字符串
                 cellValue = String.valueOf(cell.getStringCellValue());
                 break;
             case Cell.CELL_TYPE_BOOLEAN: //Boolean
                 cellValue = String.valueOf(cell.getBooleanCellValue());
                 break;
             case Cell.CELL_TYPE_FORMULA: //公式
                 cellValue = String.valueOf(cell.getCellFormula());
                 break;
             case Cell.CELL_TYPE_BLANK: //空值
                 cellValue = "";
                 break;
             case Cell.CELL_TYPE_ERROR: //故障
                 cellValue = "非法字符";
                 break;
             default:
                 cellValue = "未知类型";
                 break;
         }
         return cellValue;
     }
     
     /**
      * 时间格式处理
      * @return
      * @author Liu Xin Nan
      * @data 2017年11月27日
      */
     public static String stringDateProcess(Cell cell){
         String result = new String();  
         if (true) {// 处理日期格式、时间格式  
             SimpleDateFormat sdf = null;  
             if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {  
                 sdf = new SimpleDateFormat("HH:mm");  
             } else {// 日期  
                 sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");  
             }  
             Date date = cell.getDateCellValue();  
             result = sdf.format(date);  
         } else if (cell.getCellStyle().getDataFormat() == 58) {  
             // 处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是58)  
             SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");  
             double value = cell.getNumericCellValue();  
             Date date = org.apache.poi.ss.usermodel.DateUtil  
                     .getJavaDate(value);  
             result = sdf.format(date);  
         } else {  
             double value = cell.getNumericCellValue();  
             CellStyle style = cell.getCellStyle();  
             DecimalFormat format = new DecimalFormat();  
             String temp = style.getDataFormatString();  
             // 单元格设置成常规  
             if (temp.equals("General")) {  
                 format.applyPattern("#");  
             }  
             result = format.format(value);  
         }  
         
         return result;
     }
}