关于JXL读写以及修改EXCEL文件<转>

<span style="font-size: medium;">import jxl.*; 
import jxl.format.Underlinestyle; 
import jxl.write.*; 
import jxl.write.Number; 
import jxl.write.Boolean; 

import java.io.*; 

public class ExcelHandle 
{ 
   public ExcelHandle() 
   { 
   } 

   /** 
    * 读取Excel 
    * 
    * @param filePath 
    */ 
   public static void readExcel(String filePath) 
   { 
       try 
       { 
           InputStream is = new FileInputStream(filePath); 
           Workbook rwb = Workbook.getWorkbook(is); 
           //Sheet st = rwb.getSheet("0")这里有两种方法获取sheet表,1为名字，2为下标，从0开始 
           Sheet st = rwb.getSheet("original"); 
           Cell c00 = st.getCell(0,0); 
           //通用的获取cell值的方式,返回字符串 
           String strc00 = c00.getContents(); 
           //获得cell具体类型值的方式 
           if(c00.getType() == CellType.LABEL) 
           { 
               LabelCell labelc00 = (LabelCell)c00; 
               strc00 = labelc00.getString(); 
           } 
           //输出 
           System.out.println(strc00); 
           //关闭 
           rwb.close(); 
       } 
       catch(Exception e) 
       { 
           e.printStackTrace(); 
       } 
   } 

   /** 
    * 输出Excel 
    * 
    * @param os 
    */ 
   public static void writeExcel(OutputStream os) 
   { 
       try 
       { 
           /** 
            * 只能通过API提供的工厂方法来创建Workbook，而不能使用WritableWorkbook的构造函数， 
            * 因为类WritableWorkbook的构造函数为protected类型 
            * method(1)直接从目标文件中读取WritableWorkbook wwb = Workbook.createWorkbook(new File(targetfile)); 
            * method(2)如下实例所示 将WritableWorkbook直接写入到输出流 

            */ 
           WritableWorkbook wwb = Workbook.createWorkbook(os); 
           //创建Excel工作表 指定名称和位置 
           WritableSheet ws = wwb.createSheet("Test Sheet 1",0); 

           //**************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"); 
           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); 
           //写入工作表 
           wwb.write(); 
           wwb.close(); 
       } 
       catch(Exception e) 
       { 
           e.printStackTrace(); 
       } 
   } 

   /** 
    * 拷贝后,进行修改,其中file1为被copy对象，file2为修改后创建的对象；如果不想改名字的话他们可以一样
    * 尽单元格原有的格式化修饰是不能去掉的，我们还是可以将新的单元格修饰加上去， 
    * 以使单元格的内容以不同的形式表现 
    * @param file1 
    * @param file2 
    */ 
   public static void modifyExcel(File file1,File file2) 
   { 
       try 
       { 
           Workbook rwb = Workbook.getWorkbook(file1); 
//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(file2,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(); 
       } 
   } 


   //测试 
   public static void main(String[] args) 
   { 
       try 
       { 
           //读Excel 
           ExcelHandle.readExcel("f:/testRead.xls"); 
           //输出Excel 
           File fileWrite = new File("f:/testWrite.xls"); 
           fileWrite.createNewFile(); 
           OutputStream os = new FileOutputStream(fileWrite); 
           ExcelHandle.writeExcel(os); 
           //修改Excel 
           ExcelHandle.modifyExcel(new file(""),new File("")); 
       } 
       catch(Exception e) 
       { 
          e.printStackTrace(); 
       } 
   } 
} 

2.在jsp中做相关测试，创建一个writeExcel.jsp 
<% 
response.reset();//清除Buffer 
response.setContentType("application/vnd.ms-excel"); 
File fileWrite = new File("f:/testWrite.xls"); 
fileWrite.createNewFile(); 
new FileOutputStream(fileWrite); 
ExcelHandle.writeExcel(new FileOutputStream(fileWrite)); 
%> 
在IE中浏览writeExcel.jsp就可以动态生成Excel文档了，其中response.setContentType("application/vnd.ms-excel");语句必须要，才能确保不乱码，在jsp中输入<%@page contentType="application/vnd.ms-excel;charset=GBK"%>不行。</span>

<span style="font-size: medium;">public static void modifyExcel(File file1,File file2)    
       {    
        WritableWorkbook workbook=null;
        WritableSheet sheet=null;
        Workbook rwb;
        try {
            rwb = Workbook.getWorkbook(file1);
            workbook = Workbook.createWorkbook(file2,rwb);
            sheet=workbook.getSheet(0);
            Label label=new Label(2,2,"zzzz");
            sheet.addCell(label);
            workbook.write();
            workbook.close();
        } catch (BiffException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (RowsExceededException e) {
            e.printStackTrace();
        } catch (WriteException e) {
            e.printStackTrace();
        }
        
       }    </span>