Excel是我们平时工作中比较常用的用于存储二维表数据的，JAVA也可以直接对Excel进行操作，在这篇博客中将为大家介绍两种操作Excel的方式，分别为：jxl和poi。

jxl

写Excel

import java.io.File;
import java.io.IOException;

import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;

/**
 * jxl写Excel
 *
 * @author jianggujin
 *
 */
public class JxlWriteDemo
{
   public static void main(String[] args) throws IOException, WriteException
   {
      File xlsFile = new File("jxl.xls");
      // 创建一个工作簿
      WritableWorkbook workbook = Workbook.createWorkbook(xlsFile);
      // 创建一个工作表
      WritableSheet sheet = workbook.createSheet("sheet1", 0);
      for (int row = 0; row < 10; row++)
      {
         for (int col = 0; col < 10; col++)
         {
            // 向工作表中添加数据
            sheet.addCell(new Label(col, row, "data" + row + col));
         }
      }
      workbook.write();
      workbook.close();
   }
}

读Excel

import java.io.File;
import java.io.IOException;

import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;

/**
 * jxl读excel
 *
 * @author jianggujin
 *
 */
public class JxlReadDemo
{
   public static void main(String[] args) throws BiffException, IOException
   {
      File xlsFile = new File("jxl.xls");
      // 获得工作簿对象
      Workbook workbook = Workbook.getWorkbook(xlsFile);
      // 获得所有工作表
      Sheet[] sheets = workbook.getSheets();
      // 遍历工作表
      if (sheets != null)
      {
         for (Sheet sheet : sheets)
         {
            // 获得行数
            int rows = sheet.getRows();
            // 获得列数
            int cols = sheet.getColumns();
            // 读取数据
            for (int row = 0; row < rows; row++)
            {
               for (int col = 0; col < cols; col++)
               {
                  System.out.printf("%10s", sheet.getCell(col, row)
                        .getContents());
               }
               System.out.println();
            }
         }
      }
      workbook.close();
   }
}

poi

写Excel

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

/**
 * Poi写Excel
 *
 * @author jianggujin
 *
 */
public class PoiWriteDemo
{
   public static void main(String[] args) throws IOException
   {
      // 创建工作薄
      HSSFWorkbook workbook = new HSSFWorkbook();
      // 创建工作表
      HSSFSheet sheet = workbook.createSheet("sheet1");

      for (int row = 0; row < 10; row++)
      {
         HSSFRow rows = sheet.createRow(row);
         for (int col = 0; col < 10; col++)
         {
            // 向工作表中添加数据
            rows.createCell(col).setCellValue("data" + row + col);
         }
      }

      File xlsFile = new File("poi.xls");
      FileOutputStream xlsStream = new FileOutputStream(xlsFile);
      workbook.write(xlsStream);
   }
}

读Excel

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;

/**
 * Poi写Excel
 *
 * @author jianggujin
 *
 */
public class PoiReadDemo
{
   public static void main(String[] args) throws IOException,
         InvalidFormatException
   {
      File xlsFile = new File("poi.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
         for (int row = 0; row < rows; row++)
         {
            Row r = sheet.getRow(row);
            for (int col = 0; col < cols; col++)
            {
               System.out.printf("%10s", r.getCell(col).getStringCellValue());
            }
            System.out.println();
         }
      }
   }
}

jxl和Poi两种方式在操作Excel的时候，各有优缺点，所以在开发时应考虑实际情况选用。