java导出Excel通用方法的实例详解

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; 
 } 
} 

/** 
 * 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; 
}