POI解析excel格式的文件(xls,xlsx)


先贴出所需的jar包:

  1.poi-3.17-beta1.jar

  2.poi-ooxml-3.17-beta1.jar

  3.poi-ooxml-schemas-3.17-beta1.jar

  4.commons-collections4-4.1.jar

  5.xmlbeans-2.6.0.jar

jar包以及示例excel文件下载地址:链接:https://pan.baidu.com/s/1G7zyhPp-Imi8bKU9yn35zA 密码:m1qt


  • 话不多说,直接上代码
    package parseexcel;
    
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.ArrayList;
    import java.util.LinkedHashMap;
    import java.util.List;
    import java.util.Map;
    import java.util.Map.Entry;
    
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;
    import org.apache.poi.ss.usermodel.Cell;
    import org.apache.poi.ss.usermodel.DateUtil;
    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 ParseExcelTest {
        public static void main(String[] args){
            printExcel();
        }
    
        public static void printExcel(){
            Workbook wb =null;
            Sheet sheet = null;
            Row row = null;
            List<Map<String,String>> list = null;
            String cellData = null;
            String filePath = "D:\\test.xlsx";
            String columns[] = {"姓名","打卡日期","上班打卡时间","下班打卡时间"};
            wb = readExcel(filePath);
            if(wb != null){
                //用来存放表中数据
                list = new ArrayList<Map<String,String>>();
                //获取第一个sheet
                sheet = wb.getSheetAt(0);
                //获取最大行数
                int rownum = sheet.getPhysicalNumberOfRows();
                //获取第一行
                row = sheet.getRow(0);
                //获取最大列数
                int colnum = row.getPhysicalNumberOfCells();
                for (int i = 1; i<rownum; i++) {
                    Map<String,String> map = new LinkedHashMap<String,String>();
                    row = sheet.getRow(i);
                    if(row !=null){
                        for (int j=0;j<colnum;j++){
                            cellData = (String) getCellFormatValue(row.getCell(j));
                            map.put(columns[j], cellData);
                        }
                    }else{
                        break;
                    }
                    list.add(map);
                }
            }
            //遍历解析出来的list
            for (Map<String,String> map : list) {
                for (Entry<String,String> entry : map.entrySet()) {
                    System.out.print(entry.getKey()+":"+entry.getValue()+",");
                }
                System.out.println();
            }
    
        }
    
    
        //读取excel
        public static Workbook readExcel(String filePath){
            Workbook wb = null;
            if(filePath==null){
                return null;
            }
            String extString = filePath.substring(filePath.lastIndexOf("."));
            InputStream is = null;
            try {
                is = new FileInputStream(filePath);
                if(".xls".equals(extString)){
                    return wb = new HSSFWorkbook(is);
                }else if(".xlsx".equals(extString)){
                    return wb = new XSSFWorkbook(is);
                }else{
                    return wb = null;
                }
    
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return wb;
        }
    
        public static Object getCellFormatValue(Cell cell){
            Object cellValue = null;
            if(cell!=null){
                //判断cell类型
                switch(cell.getCellType()){
                    case Cell.CELL_TYPE_NUMERIC:{
                        cellValue = String.valueOf(cell.getNumericCellValue());
                        break;
                    }
                    case Cell.CELL_TYPE_FORMULA:{
                        //判断cell是否为日期格式
                        if(DateUtil.isCellDateFormatted(cell)){
                            //转换为日期格式YYYY-mm-dd
                            cellValue = cell.getDateCellValue();
                        }else{
                            //数字
                            cellValue = String.valueOf(cell.getNumericCellValue());
                        }
                        break;
                    }
                    case Cell.CELL_TYPE_STRING:{
                        cellValue = cell.getRichStringCellValue().getString();
                        break;
                    }
                    default:
                        cellValue = "";
                }
            }else{
                cellValue = "";
            }
            return cellValue;
        }
    }
  • 主要API说明

    1)import org.apache.poi.ss.usermodel.Workbook,对应Excel文档;

    2)import org.apache.poi.hssf.usermodel.HSSFWorkbook,对应xls格式的Excel文档;

    3)import org.apache.poi.xssf.usermodel.XSSFWorkbook,对应xlsx格式的Excel文档;

    4)import org.apache.poi.ss.usermodel.Sheet,对应Excel文档中的一个sheet;

    5)import org.apache.poi.ss.usermodel.Row,对应一个sheet中的一行;

    6)import org.apache.poi.ss.usermodel.Cell,对应一个单元格。

  • Excel示例以及运行结果

   excel示例

    

   运行结果

    

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转载自www.cnblogs.com/carryLess/p/9108427.html