java使用poi读取excel文件代码示例

import java.io.FileInputStream;
import java.io.IOException;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
/**
 * @author la
 *POI工具读取Excel文件
 */
public class ParseExcel {

    private void parseExcel(String excelFile)throws IOException {
        POIFSFileSystem fs=new POIFSFileSystem(new FileInputStream(excelFile));//打开Excel文件
        HSSFWorkbook wbHssfWorkbook=new HSSFWorkbook(fs);//打开工作薄
        HSSFSheet sheet=wbHssfWorkbook.getSheetAt(0);//打开工作表

        HSSFRow row=null;
        String data=null;
        for (int i = 0; i <=sheet.getLastRowNum(); i++) {//循环读取每一行
            row =sheet.getRow(i);
            for (int j = 0; j <= row.getLastCellNum(); j++) {//循环读取每一列
                switch (row.getCell((short)j).getCellType()) {//判断单元格的数据类型
                case HSSFCell.CELL_TYPE_BLANK:
                    data="";
                    break;
                case HSSFCell.CELL_TYPE_NUMERIC:
                    data=(long)row.getCell((short)j).getNumericCellValue()+"";
                    break;
                default:
                    data=row.getCell((short)j).getStringCellValue();
                    break;
                }
                System.out.print(data+"t");
            }
            System.out.println();
        }
    }
    /**
     * @param args
     *void
     */
    public static void main(String[] args)throws IOException {
        new ParseExcel().parseExcel(args[0]);
    }

}