通过jxl.jar 读取、导出excel的小例子

通过jxl.jar 读取、导出excel的小例子。

下载jxl.jar API地址 ：http://ishare.iask.sina.com.cn/f/17173351.html?from=like

 

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);
 }

}