POI解析excel格式的文件(xls,xlsx)



先貼出所需的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文件下載地址:鏈接:https://pan.baidu.com/s/1G7zyhPp-Imi8bKU9yn35zA 密碼:m1qt


 

  • 話不多說,直接上代碼
    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","上班打卡時間","下班打卡時間"};
            wb = readExcel(filePath);
            if(wb != null){
                //用來存放表中數據
                list = new ArrayList<Map<String,String>>();
                //獲取第一個sheet
                sheet = wb.getSheetAt(0);
                //獲取最大行數
                int rownum = sheet.getPhysicalNumberOfRows();
                //獲取第一行
                row = sheet.getRow(0);
                //獲取最大列數
                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);
                }
            }
            //遍歷解析出來的list
            for (Map<String,String> map : list) {
                for (Entry<String,String> entry : map.entrySet()) {
                    System.out.print(entry.getKey()+":"+entry.getValue()+",");
                }
                System.out.println();
            }
    
        }
    
    
        //讀取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){
                //判斷cell類型
                switch(cell.getCellType()){
                    case Cell.CELL_TYPE_NUMERIC:{
                        cellValue = String.valueOf(cell.getNumericCellValue());
                        break;
                    }
                    case Cell.CELL_TYPE_FORMULA:{
                        //判斷cell是否為日期格式
                        if(DateUtil.isCellDateFormatted(cell)){
                            //轉換為日期格式YYYY-mm-dd
                            cellValue = cell.getDateCellValue();
                        }else{
                            //數字
                            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說明

    1)import org.apache.poi.ss.usermodel.Workbook,對應Excel文檔;

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

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

    4)import org.apache.poi.ss.usermodel.Sheet,對應Excel文檔中的一個sheet;

    5)import org.apache.poi.ss.usermodel.Row,對應一個sheet中的一行;

    6)import org.apache.poi.ss.usermodel.Cell,對應一個單元格。

  • Excel示例以及運行結果

   excel示例

    

   運行結果

    

 


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