JAVA POI 应用系列（2）--读取Excel

添加maven依赖

    <dependency>  
        <groupId>org.apache.poi</groupId>  
        <artifactId>poi</artifactId>  
        <version>3.10-FINAL</version>  
    </dependency>  
    <dependency>  
        <groupId>org.apache.poi</groupId>  
        <artifactId>poi-ooxml</artifactId>  
        <version>3.10-FINAL</version>  
    </dependency>

实现代码：

package com.yanwu.www.spring_hibernate.util;

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Iterator;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
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 ReadExcelFileToList {
    public static void main(String[] args) throws IOException {
         
        String fileName="C:\Users\IBM_ADMIN\Desktop\promotion\a.xls";
          FileInputStream fis = new FileInputStream(fileName); 
            Workbook workbook = null;
          //判断excel的两种格式xls,xlsx
          if(fileName.toLowerCase().endsWith("xlsx")){  
              workbook = new XSSFWorkbook(fis);  
          }else if(fileName.toLowerCase().endsWith("xls")){  
              workbook = new HSSFWorkbook(fis);  
          }  
          
            
          //得到sheet的总数  
          int numberOfSheets = workbook.getNumberOfSheets();  
          
          System.out.println("一共"+numberOfSheets+"个sheet");
          
        //循环每一个sheet  
          for(int i=0; i < numberOfSheets; i++){  
                 
              //得到第i个sheet  
              Sheet sheet = workbook.getSheetAt(i);  
              System.out.println(sheet.getSheetName()+"  sheet");
                 
              //得到行的迭代器  
              Iterator<Row> rowIterator = sheet.iterator();  
              
              int rowCount=0;
              //循环每一行
              while (rowIterator.hasNext())   
              {  
                  System.out.print("第"+(rowCount++)+"行  ");
                  
                  //得到一行对象  
                  Row row = rowIterator.next();  
                     
                  //得到列对象 
                  Iterator<Cell> cellIterator = row.cellIterator();  
                  
                  int columnCount=0;  
                  
                  //循环每一列
                  while (cellIterator.hasNext())   
                  {  
                      //System.out.print("第"+(columnCount++)+"列:  ");
                      
                      //得到单元格对象
                      Cell cell = cellIterator.next();
                      
                      //检查数据类型 
                      switch(cell.getCellType()){  
                      case Cell.CELL_TYPE_STRING:  
                              System.out.print(cell.getStringCellValue()+"   ");    
                          break;  
                      case Cell.CELL_TYPE_NUMERIC:  
                          System.out.print(cell.getNumericCellValue()+"   ");  
                      }  
                  } //end of cell iterator 
                  
                  System.out.println();
                 
              } //end of rows iterator  
              
            
                 
          } //end of sheets for loop  
             
          
         System.out.println("
read excel successfully...");
         
          //close file input stream  
          fis.close();  
             
     
        

        
    }
}

效果：