poi导入导出

使用poi来解析Excel的xls和xlsx。 

解析xls： 

package xls;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class XlsMain {

  public static void main( String[] args) throws IOException {
    XlsMain xlsMain = new XlsMain();

    xlsMain.readXls();
  }

  private void readXls() throws IOException{
    InputStream is = new FileInputStream( "D:\excel\xls_test2.xls");
    HSSFWorkbook hssfWorkbook = new HSSFWorkbook( is);

    // 循环工作表Sheet
    for(int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++){
      HSSFSheet hssfSheet = hssfWorkbook.getSheetAt( numSheet);
      if(hssfSheet == null){
        continue;
      }

      // 循环行Row
      for(int rowNum = 0; rowNum <= hssfSheet.getLastRowNum(); rowNum++){
        HSSFRow hssfRow = hssfSheet.getRow( rowNum);
        if(hssfRow == null){
          continue;
        }

        // 循环列Cell
        for(int cellNum = 0; cellNum <= hssfRow.getLastCellNum(); cellNum++){
          HSSFCell hssfCell = hssfRow.getCell( cellNum);
          if(hssfCell == null){
            continue;
          }

          System.out.print("    " + getValue( hssfCell));
        }
        System.out.println();
      }
    }
  }

  @SuppressWarnings("static-access")
  private String getValue(HSSFCell hssfCell){
    if(hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN){
      return String.valueOf( hssfCell.getBooleanCellValue());
    }else if(hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC){
      return String.valueOf( hssfCell.getNumericCellValue());
    }else{
      return String.valueOf( hssfCell.getStringCellValue());
    }
  }

}

解析xlsx： 

package xlsx;

import java.io.IOException;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class XlsxMain {

  public static void main( String[] args) throws IOException {
    XlsxMain xlsxMain = new XlsxMain();

    xlsxMain.readXlsx();
  }

  private void readXlsx() throws IOException{
    String fileName = "D:\excel\xlsx_test.xlsx";
    XSSFWorkbook xssfWorkbook = new XSSFWorkbook( fileName);

    // 循环工作表Sheet
    for(int numSheet = 0; numSheet < xssfWorkbook.getNumberOfSheets(); numSheet++){
      XSSFSheet xssfSheet = xssfWorkbook.getSheetAt( numSheet);
      if(xssfSheet == null){
        continue;
      }

      // 循环行Row
      for(int rowNum = 0; rowNum <= xssfSheet.getLastRowNum(); rowNum++ ){
        XSSFRow xssfRow = xssfSheet.getRow( rowNum);
        if(xssfRow == null){
          continue;
        }

        // 循环列Cell
        for(int cellNum = 0; cellNum <= xssfRow.getLastCellNum(); cellNum++){
          XSSFCell xssfCell = xssfRow.getCell( cellNum);
          if(xssfCell == null){
            continue;
          }
          System.out.print("   "+getValue(xssfCell));
        }
        System.out.println();
      }
    }
  }

  @SuppressWarnings("static-access")
  private String getValue(XSSFCell xssfCell){
    if(xssfCell.getCellType() == xssfCell.CELL_TYPE_BOOLEAN){
      return String.valueOf( xssfCell.getBooleanCellValue());
    }else if(xssfCell.getCellType() == xssfCell.CELL_TYPE_NUMERIC){
      return String.valueOf( xssfCell.getNumericCellValue());
    }else{
      return String.valueOf( xssfCell.getStringCellValue());
    }
  }

}