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("\nread excel successfully...");

           //close file input stream
           fis.close();  

     }
 }

效果：