java 中导出Excel

 

package oa.common.utils;
import java.io.OutputStream;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.ServletActionContext;
import java.lang.reflect.Field;

import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.VerticalAlignment;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
/***
 * @author lsf
 */
public class ExportExcel {
 /***************************************************************************
  * @param fileName EXCEL文件名称
  * @param listTitle EXCEL文件第一行列标题集合
  * @param listContent EXCEL文件正文数据集合
  * @return
  */
 public  final static String exportExcel(String fileName,String[] Title, List<Object> listContent) {
  String result="系统提示：Excel文件导出成功！";
  // 以下开始输出到EXCEL
  try {
   //定义输出流，以便打开保存对话框______________________begin
   HttpServletResponse response=ServletActionContext.getResponse();
   OutputStream os = response.getOutputStream();// 取得输出流
   response.reset();// 清空输出流
   response.setHeader("Content-disposition", "attachment; filename="+ new String(fileName.getBytes("GB2312"),"ISO8859-1"));
// 设定输出文件头
   response.setContentType("application/msexcel");// 定义输出类型
   //定义输出流，以便打开保存对话框_______________________end

   /** **********创建工作簿************ */
   WritableWorkbook workbook = Workbook.createWorkbook(os);

   /** **********创建工作表************ */

   WritableSheet sheet = workbook.createSheet("Sheet1", 0);

   /** **********设置纵横打印（默认为纵打）、打印纸***************** */
   jxl.SheetSettings sheetset = sheet.getSettings();
   sheetset.setProtected(false);


   /** ************设置单元格字体************** */
   WritableFont NormalFont = new WritableFont(WritableFont.ARIAL, 10);
   WritableFont BoldFont = new WritableFont(WritableFont.ARIAL, 10,WritableFont.BOLD);

   /** ************以下设置三种单元格样式，灵活备用************ */
   // 用于标题居中
   WritableCellFormat wcf_center = new WritableCellFormat(BoldFont);
   wcf_center.setBorder(Border.ALL, BorderLineStyle.THIN); // 线条
   wcf_center.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
   wcf_center.setAlignment(Alignment.CENTRE); // 文字水平对齐
   wcf_center.setWrap(false); // 文字是否换行

   // 用于正文居左
   WritableCellFormat wcf_left = new WritableCellFormat(NormalFont);
   wcf_left.setBorder(Border.NONE, BorderLineStyle.THIN); // 线条
   wcf_left.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
   wcf_left.setAlignment(Alignment.LEFT); // 文字水平对齐
   wcf_left.setWrap(false); // 文字是否换行


   /** ***************以下是EXCEL开头大标题，暂时省略********************* */
   //sheet.mergeCells(0, 0, colWidth, 0);
   //sheet.addCell(new Label(0, 0, "XX报表", wcf_center));
   /** ***************以下是EXCEL第一行列标题********************* */
   for (int i = 0; i < Title.length; i++) {
    sheet.addCell(new Label(i, 0,Title[i],wcf_center));
   }
   /** ***************以下是EXCEL正文数据********************* */
   Field[] fields=null;
   int i=1;
   for(Object obj:listContent){
       fields=obj.getClass().getDeclaredFields();
       int j=0;
       for(Field v:fields){
           v.setAccessible(true);
           Object va=v.get(obj);
           if(va==null){
               va="";
           }
           sheet.addCell(new Label(j, i,va.toString(),wcf_left));
           j++;
       }
       i++;
   }
   /** **********将以上缓存中的内容写到EXCEL文件中******** */
   workbook.write();
   /** *********关闭文件************* */
   workbook.close();

  } catch (Exception e) {
   result="系统提示：Excel文件导出失败，原因："+ e.toString();
   System.out.println(result);
   e.printStackTrace();
  }
  return result;
 }
}

测试：

•  * 导出excel 

•  * @return 
•  */  
• public String excelPage(){  
•     ExportExcel excel=new ExportExcel();  
•     String str="";  
•     try {  
•         str = new String(getHTTP.getRequest().getParameter("wineOrg.orgName").getBytes("iso8859-1"),"UTF-8");  
•     } catch (UnsupportedEncodingException e) {  
•         // TODO Auto-generated catch block  
•         e.printStackTrace();  
•     }  
•     wineOrg.setOrgName(str);  
•     List<Object> li=service.exportExcel(wineOrg);  
•     String[] Title={"机构ID","会员编号","类别","名称","省ID","省名称","城市ID","城市名称","详细地址","联系人","性别","联系手机","联系电话","传真","邮箱","QQ","生日","积分","客户等级","现金账户余额","结算方式","客户类型","购买次数","购买支数","创建人ID","创建人姓名","create_time","del","STS","备注","负责人ID","负责人姓名","审核标识","审核人ID ","审核人姓名","审核日期","分配人ID","分配人姓名","分配日期","修改人ID","修改人姓名  ","修改时间"};  
•     excel.exportExcel("客户资料信息.xls",Title, li);   
•     return SUCCESS;  
• }