java 读取excel

/**
 * @Author: 唐松怀
 * @Date: 2020/2/26 14:40
 */
import java.io.File;
import java.io.IOException;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
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.ss.usermodel.WorkbookFactory;
    public class excel01
    {
        public static void main(String[] args) throws IOException,
                InvalidFormatException
        {
            File xlsFile = new File("C:\Users\Admin\Desktop\01.xls");
            // 获得工作簿
            Workbook workbook = WorkbookFactory.create(xlsFile);
            // 获得工作表个数
            int sheetCount = workbook.getNumberOfSheets();
            // 遍历工作表
            for (int i = 0; i < sheetCount; i++)
            {
                Sheet sheet = workbook.getSheetAt(i);
                // 获得行数
                int rows = sheet.getLastRowNum() + 1;
                // 获得列数，先获得一行，在得到改行列数
                Row tmp = sheet.getRow(0);
                if (tmp == null)
                {
                    continue;
                }
                int cols = tmp.getPhysicalNumberOfCells();
                // 读取数据  getPhysicalNumberOfCells 是获取不为空的列个数。
　　　　　　　　　　　　//getLastCellNum 是获取最后一个不为空的列是第几个 

                for (int row = 0; row < rows; row++)
                {
                    Row r = sheet.getRow(row);
                    for (int col = 0; col < cols; col++)
                    {
                        if (col==2 && row!=0 )   {
                            String result=r.getCell(col).getStringCellValue();
                            String t01=result;
                            String t02= t01.replace("a","").replace("/","-");
                            System.out.print(t02+" ");
                            continue;
                        }
                        System.out.printf(r.getCell(col).getStringCellValue()+" ");
                    }
                    System.out.println();
                }
            }
        }
    }

excel 格式

getLastCellNum 是获取最后一个不为空的列是第几个