在Java編程中怎麼將從數據庫查詢出來的數據導成Excel文件？

import jxl.*;   
import jxl.write.*;   
import java.io.*;   
import java.io.File.*;   
import java.util.*;   

public class excel   
{   
public static void main(String[] args)    
{   

String targetfile = "c:/out.xls";//輸出的excel文件名   
String worksheet = "List";//輸出的excel文件工作表名   
String[] title = {"ID","NAME","DESCRIB"};//excel工作表的標題   

WritableWorkbook workbook;   
try 
{   
//創建可寫入的Excel工作薄,運行生成的文件在tomcat/bin下   
//workbook = Workbook.createWorkbook(new File("output.xls"));    
System.out.println("begin");   

OutputStream os=new FileOutputStream(targetfile);    
workbook=Workbook.createWorkbook(os);    

WritableSheet sheet = workbook.createSheet(worksheet, 0); //添加第一個工作表   
//WritableSheet sheet1 = workbook.createSheet("MySheet1", 1); //可添加第二個工作   
/* 
jxl.write.Label label = new jxl.write.Label(0, 2, "A label record"); //put a label in cell A3, Label(column,row) 
sheet.addCell(label);   
*/ 

jxl.write.Label label;   
for (int i=0; i<title.length; i++)   
{   
//Label(列號,行號 ,內容 )   
label = new jxl.write.Label(i, 0, title[i]); //put the title in row1    
sheet.addCell(label);    
}   

//下列添加的對字體等的設置均調試通過，可作參考用   

//添加數字   
jxl.write.Number number = new jxl.write.Number(3, 4, 3.14159); //put the number 3.14159 in cell D5   
sheet.addCell(number);   

//添加帶有字型Formatting的對象    
jxl.write.WritableFont wf = new jxl.write.WritableFont(WritableFont.TIMES,10,WritableFont.BOLD,true);    
jxl.write.WritableCellFormat wcfF = new jxl.write.WritableCellFormat(wf);    
jxl.write.Label labelCF = new jxl.write.Label(4,4,"文本",wcfF);    
sheet.addCell(labelCF);    

//添加帶有字體顏色,帶背景顏色 Formatting的對象    
jxl.write.WritableFont wfc = new jxl.write.WritableFont(WritableFont.ARIAL,10,WritableFont.BOLD,false,jxl.format.UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.RED);    
jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(wfc);    
wcfFC.setBackground(jxl.format.Colour.BLUE);   
jxl.write.Label labelCFC = new jxl.write.Label(1,5,"帶顏色",wcfFC);    
sheet.addCell(labelCFC);    

//添加帶有formatting的Number對象    
jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##");    
jxl.write.WritableCellFormat wcfN = new jxl.write.WritableCellFormat(nf);    
jxl.write.Number labelNF = new jxl.write.Number(1,1,3.1415926,wcfN);    
sheet.addCell(labelNF);    

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

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

//添加帶有formatting的DateFormat對象    
jxl.write.DateFormat df = new jxl.write.DateFormat("ddMMyyyyhh:mm:ss");    
jxl.write.WritableCellFormat wcfDF = new jxl.write.WritableCellFormat(df);    
jxl.write.DateTime labelDTF = new jxl.write.DateTime(1,3,new java.util.Date(),wcfDF);    
sheet.addCell(labelDTF);    

//和賓單元格   
//sheet.mergeCells(int col1,int row1,int col2,int row2);//左上角到右下角   
sheet.mergeCells(4,5,8,10);//左上角到右下角   
wfc = new jxl.write.WritableFont(WritableFont.ARIAL,40,WritableFont.BOLD,false,jxl.format.UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.GREEN);    
jxl.write.WritableCellFormat wchB = new jxl.write.WritableCellFormat(wfc);    
wchB.setAlignment(jxl.format.Alignment.CENTRE);   
labelCFC = new jxl.write.Label(4,5,"單元合併",wchB);    
sheet.addCell(labelCFC); //   

//設置邊框   
jxl.write.WritableCellFormat wcsB = new jxl.write.WritableCellFormat();    
wcsB.setBorder(jxl.format.Border.ALL,jxl.format.BorderLineStyle.THICK);   
labelCFC = new jxl.write.Label(0,6,"邊框設置",wcsB);    
sheet.addCell(labelCFC);    
workbook.write();    
workbook.close();   
}catch(Exception e)    
{    
e.printStackTrace();    
}    
System.out.println("end");   
Runtime r=Runtime.getRuntime();    
Process p=null;    
//String cmd[]={"notepad","exec.java"};    
String cmd[]={"C:\\Program Files\\Microsoft Office\\Office\\EXCEL.EXE","out.xls"};    
try{    
p=r.exec(cmd);    
}    
catch(Exception e){    
System.out.println("error executing: "+cmd[0]);    
}   

}   
}