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struts2+jxl 导出页面表格 为 excel,该如何解决

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struts2+jxl 导出页面表格 为 excel
类似下面代码,查询到值以后在页面迭代输出:
<table border="1" width="350" id="tb">
  <tr>
  <th>书名</th>
  <th>作者</th>
  </tr>
  <s:iterator value="kind" id="score" status="st">
  <tr>
  <td> <s:property value="key"/></td>
  <td> <s:property value="value"/></td>
  </tr>
  </s:iterator>
   
  </table>
  <input type="button" onclick="...."/>
本想用js代码导出为excel文件,可是涉及到站点安全性,不太方便,希望高手帮忙
   
 

------解决方案--------------------
调用后台action生成文件,然后输出流。
------解决方案--------------------
//将表格和内容一起导出到Exel
function AllAreaExcel(PrintA)
{
var oXL=new ActiveXObject("Excel.Application");
var oWB=oXL.Workbooks.Add();
var oSheet=oWB.ActiveSheet;
var sel=document.body.createTextRange();
sel.moveToElementText(PrintA);
sel.select();
sel.execCommand("Copy");
oSheet.Paste();
oXL.Visible=true;
}
------解决方案--------------------
java中jxl导出数据到excel的例子 
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";//输出的excel文件名
String worksheet = "List";//输出的excel文件工作表名
String[] title = {"ID","NAME","DESCRIB"};//excel工作表的标题


WritableWorkbook workbook;
try 
{
//创建可写入的Excel工作薄,运行生成的文件在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); //添加第一个工作表
//WritableSheet sheet1 = workbook.createSheet("MySheet1", 1); //可添加第二个工作
/* 
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);
行列索引以0开始
*/ 

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




//下列添加的对字体等的设置均调试通过,可作参考用


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

//添加带有字型Formatting的对象
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);

//添加带有字体颜色,带背景颜色 Formatting的对象
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,"带颜色",wcfFC);
sheet.addCell(labelCFC);

//添加带有formatting的Number对象
jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##");

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