通过jxl.jar 读取、导出excel的实例代码

 package export.excel;

import java.io.bufferedinputstream;
import java.io.bufferedoutputstream;
import java.io.file;
import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.io.outputstream;
import java.util.arraylist;
import java.util.list;
import java.util.random;

import jxl.cell;
import jxl.sheet;
import jxl.workbook;
import jxl.format.alignment;
import jxl.format.verticalalignment;
import jxl.write.label;
import jxl.write.writablecellformat;
import jxl.write.writablesheet;
import jxl.write.writableworkbook;
import export.vo.personvo;

/**导出excel文件
 *
 * @author 路人甲
 *
 */
public class exportexcel {

 
 public list<personvo> personvolist;

 public exportexcel()
 {
  initdata();
 }

 /**
  * 初始化数据
  */
 public void initdata()
 {
  // 随机函数
  random random = new random();
  personvolist = new arraylist<personvo>();
  // 初始化100个人进集合
  personvo personvo = null;
  for (int i = 0; i < 100; i++)
  {
   personvo = new personvo();
   personvo.setid("" + i);
   personvo.setname("路人" + i);
   if (i%2==0)
   {
    personvo.setsex("男");
   }
   else
   {
    personvo.setsex("女");
   }
   // 取100岁以内的随机年龄
   personvo.setage("" + random.nextint(100));
   personvolist.add(personvo);
  }
 }

 /**导出数据以excel格式导出
  * exportname 导出文件名称
  * @param exportname
  */
 public void exportperson(string exportname)
 {
  try{
   file excelfile = new file(exportname + "temp.xls");
   // 文件格式
   writablecellformat format = new writablecellformat();
   // x  靠左
   format.setalignment(alignment.right);
   // y 靠顶
   format.setverticalalignment(verticalalignment.top);

   // 创建一个工作文件
   writableworkbook writableworkbook = workbook.createworkbook(excelfile);
   // 创建一个工作簿
   writablesheet sheet1 = writableworkbook.createsheet("个人信息列表", 0);
   //创建行数 设置行的宽度
   sheet1.setcolumnview(0, 10);
   sheet1.setcolumnview(1, 10);
   sheet1.setcolumnview(2, 10);
   sheet1.setcolumnview(3, 10);
   // 设置行的值
   sheet1.addcell(new label(0, 0, "id", format));
   sheet1.addcell(new label(1, 0, "姓名", format));
   sheet1.addcell(new label(2, 0, "性别", format));
   sheet1.addcell(new label(3, 0, "年龄", format));

   // 把集合写入到excel中
   int rownum = 1;
   for (personvo bean : personvolist)
   {
    int colspannum = 0;
    sheet1.addcell(new label(colspannum, rownum, bean.getid(), format));
    sheet1.addcell(new label(colspannum++, rownum, bean.getname(), format));
    sheet1.addcell(new label(colspannum++, rownum, bean.getsex(), format));
    sheet1.addcell(new label(colspannum++, rownum, bean.getage(), format));

    rownum++;
   }

   writableworkbook.write();
   writableworkbook.close();
//   如果是在网络下载的，那么就写这些
//            super.gethttpservletresponse().setcontenttype("application/x-msdownload");
//            string encodetittle = new string(excelname.getbytes("gbk"), "iso-8859-1");
//            super.gethttpservletresponse().addheader("content-disposition","attachment;filename="+encodetittle+".xls");
            fileinputstream finput = new fileinputstream(excelfile);
//            outputstream output = super.gethttpservletresponse().getoutputstream();
            file fout = new file(exportname + ".xls");
            outputstream output = new fileoutputstream(fout);
            bufferedinputstream buffin = new bufferedinputstream(finput);
            bufferedoutputstream buffout = new bufferedoutputstream(output);
            byte[] buffer = new byte[4096];
            int count = 0;
            while ((count = buffin.read(buffer, 0, buffer.length)) > 0) {
                buffout.write(buffer, 0, count);
            }
            buffin.close();
            buffout.close();
            finput.close();
            output.close();
            excelfile.delete();
  }
  catch (exception e) {
   e.printstacktrace();
  }
  finally
  {
   system.out.println("完成导出操作");
  }

 }

 /**导入数据以excel格式导出
  *
  * @param importexcel 导入excel文件名称
  */
 public void importperson(string importexcel)
 {
  try{
   file excelfile = new file(importexcel+".xls");
   // 创建一个工作文件
   workbook workbook = workbook.getworkbook(excelfile);
   // 获得第一个工作簿 这里有两种方法获取sheet表,1为名字，而为下标，从0开始
   sheet sheet = workbook.getsheet(0);
   // 总记录数
   int allrow = sheet.getrows();
   int allcolspan = sheet.getcolumns();
   system.out.println(allrow);
   system.out.println(allcolspan);
   // 取数据
   for (int i=0; i<allrow; i++)
   {
    // 取出每一列的值
    for (int j=0; j<allcolspan; j++)
    {
//     sheet.getcell(列数, 行数);
     cell cell = sheet.getcell(j, i);
     // 打印出该列的值
     system.out.print(cell.getcontents() + "\t");
    }
    system.out.println();
   }
   //关闭
   workbook.close();
  }catch (exception e) {
   e.printstacktrace();
  }
  finally
  {
   system.out.println("完成导入操作");
  }
 }

 /**
  * @param args
  */
 public static void main(string[] args) {

  exportexcel exportexcel = new exportexcel();
  // 设置路径
  string srcpath = "c:/quarantine/personvo";
//  导出
//  exportexcel.exportperson(srcpath);
  // 读取
  exportexcel.importperson(srcpath);
 }

}