java_Excel jxl 操作Excel文件（读取，创建，更新）

首先网上搜索了一些文章，现在java操作excel比较多的使用jxl与POI。

 

前者比较轻便，更有针对性，但是功能不够强大。

 

有人已经使用代码测试过了，详情见：http://sunjun041640.blog.163.com/blog/static/256268322008525113505/

 

POI还没用过，先弄个jxl的简单操作Excel供大家参考。

 

package excelFile;

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

import jxl.*;
import jxl.format.UnderlineStyle;
import jxl.read.biff.BiffException;
import jxl.write.*;
import jxl.write.Boolean;
import jxl.write.Number;
import jxl.write.biff.RowsExceededException;

public class TestJlxFuction {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		readExl("d:/test/wbook.xls");
		creatExl("d:/test/writebook.xls");
		modifyExl("d:/test/writebook.xls");
	}

	
	private static void creatExl(String fileName)
	{
		WritableWorkbook wwb = null;
		try {
			wwb = Workbook.createWorkbook(new File(fileName));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		WritableSheet ws = wwb.createSheet("第1页", 1);
		
		/**
		 *下面的格式设置出自： http://javacrazyer.iteye.com/blog/723924
		 */
		 //**************往工作表中添加数据***************** 

        //1.添加Label对象 
        Label label = new Label(0,0,"this is a label test"); 
        try {
			ws.addCell(label);
		

        //添加带有字型Formatting对象 
        WritableFont wf = new WritableFont(WritableFont.TIMES,18,WritableFont.BOLD,true); 
        WritableCellFormat wcf = new WritableCellFormat(wf); 
        Label labelcf = new Label(1,0,"this is a label test",wcf); 
        ws.addCell(labelcf); 

        //添加带有字体颜色的Formatting对象 
        WritableFont wfc = new WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false, 
        UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.RED); 
        WritableCellFormat wcfFC = new WritableCellFormat(wfc); 
        Label labelCF = new Label(1,0,"This is a Label Cell",wcfFC); 
        ws.addCell(labelCF); 

        //2.添加Number对象 
        Number labelN = new Number(0,1,3.1415926); 
        ws.addCell(labelN); 

        //添加带有Formatting的Number对象 
        NumberFormat nf = new NumberFormat("#.##"); 
        WritableCellFormat wcfN = new WritableCellFormat(nf); 
        Number labelNF = new jxl.write.Number(1,1,3.1415926,wcfN); 
        ws.addCell(labelNF); 

        //3.添加Boolean对象 
        Boolean labelB = new jxl.write.Boolean(0,2,false); 
        ws.addCell(labelB); 

        //4.添加DateTime对象 
        jxl.write.DateTime labelDT = new jxl.write.DateTime(0,3,new java.util.Date()); 
        ws.addCell(labelDT); 

        //添加带有Formatting的DateFormat对象 
        DateFormat df = new DateFormat("dd MM yyyy hh:mm:ss"); 
        WritableCellFormat wcfDF = new WritableCellFormat(df); 
        DateTime labelDTF = new DateTime(1,3,new java.util.Date(),wcfDF); 
        ws.addCell(labelDTF); 


        //添加图片对象,jxl只支持png格式图片 
        File image = new File("f:\\2.png"); 
        WritableImage wimage = new WritableImage(0,1,2,2,image); 
        ws.addImage(wimage); 
        } catch (RowsExceededException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (WriteException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
		try {
			wwb.write();
			try {
				wwb.close();
			} catch (WriteException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
	}
	/**
	 * 读取excel中的信息
	 * 通过获取row与column进行遍历
	 */
	private static void  readExl(String fileName)
	{
		Workbook book = null;
		Sheet [] sheets = null;
		Sheet sheet0 = null;
		try {
			try {
				book = Workbook.getWorkbook(new File(fileName));
			} catch (BiffException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
			sheets = book.getSheets();
			sheet0 = sheets[0];
			
			/*
			 * 可以通过两层循环的方式遍历获取excel中的数据
			 */
			int rowNum = sheet0.getRows();
			int colNum = sheet0.getColumns();
			
			System.out.println("Rows :" + rowNum);
			System.out.println("Columns :" + colNum);
		
			for(int r = 0; r < rowNum; r++)
			{
				for(int c = 0; c < colNum; c++)
				{
					//注意getCell 参数1为列标，参数2二行标
					Cell cell = sheet0.getCell(c, r);
					String value = cell.getContents();
					System.out.println(value);
				}
			}

			book.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	/**
	 * 更新Excel内容
	 * 采用copy的方式创建book进行操作
	 */
	
	public static void modifyExl(String fileName)   
	  {   
      try   
      {   
          Workbook rwb = Workbook.getWorkbook(new File(fileName));   
          //打开一个文件的副本，并且指定数据写回到原文件        
          WritableWorkbook wwb = Workbook.createWorkbook(new File(fileName),rwb);//copy   
          WritableSheet ws = wwb.getSheet(0);   
          WritableCell wc = ws.getWritableCell(0,0);   
          //判断单元格的类型,做出相应的转换   
          if(wc.getType() == CellType.LABEL)   
          {   
        	  Label label = (Label)wc;   
              label.setString("The value has been modified");   
          }   
          wwb.write();   
          wwb.close();   
          rwb.close();   
      }   
      catch(Exception e)   
      {   
    	  e.printStackTrace();   
      } 	  
   }   

}