如何将jTABLE的数据写入EXCEL中

package com.jiandian.zhuangwaiyun.db.dao;

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

import jxl.*;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;

import javax.swing.JOptionPane;
import javax.swing.JTable;
//EXCL读取类
public class ReaderXls {
 public void reader(String filename ,JTable table,String []mane){//传参,分别为，文件名，表名和表名上的各个属性值
  File fileWrite = new File(filename);//声明一个文件类
  try {
   fileWrite.createNewFile();
   OutputStream os = new FileOutputStream(fileWrite);
   WritableWorkbook wwb = Workbook.createWorkbook(os);
   //创建子表并写入数据
   WritableSheet ws = wwb.createSheet("Test Sheet 1", 0);
   //取得TABLE的行数
   int a = table.getRowCount();
   //取得TABLE的列数
   int b =table.getColumnCount();   
   for(int k =0;k < b;k++){
    jxl.write.Label labelN = new jxl.write.Label(k, 0, mane[k]);
    try {
     ws.addCell(labelN);
    } catch (RowsExceededException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    } catch (WriteException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   }
   for(int i =0;i<b ;i++){
    for(int j=1;j<=a;j++){
     String str = null;
     str = (String) table.getValueAt(j-1, i);
     jxl.write.Label labelN = new jxl.write.Label(i, j, str);
     try {
      ws.addCell(labelN);
     } catch (RowsExceededException e) {
      e.printStackTrace();
     } catch (WriteException e) {
      e.printStackTrace();
     }
    }
   } 
   //写入工作表
            wwb.write();
            
            try {
    wwb.close();
    JOptionPane.showMessageDialog(null, "在"+filename+"成功导入数据");
   } catch (WriteException e) {
    e.printStackTrace();
   }
  } catch (FileNotFoundException e) {
    JOptionPane.showMessageDialog(null, "导入数据前请关闭工作表");
  } catch (Exception e) {
   JOptionPane.showMessageDialog(null, "没有进行筛选");
   
  }
 }
}