Posted on 2012-03-05 16:37
viery 阅读(824)
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JavaEE
1在apache
http://poi.apache.org/download.html上下载poi开源控件包。目前最稳定的版本：
The latest stable release is Apache POI 3.7 2将poi.jar引入项目
3更改业务逻辑，将业务逻辑返回的查询到的对象集合存入session
request.getSession().setAttribute("pclist", list);
4建立ToExcelAction
package com.vle.oa.action;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.CellRangeAddress;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import com.vle.oa.domain.Pc;
public class ToExcelAction extends DispatchAction 
{
@Override
protected ActionForward unspecified(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
Workbook wb = new HSSFWorkbook();
//Workbook wb = new XSSFWorkbook();
CreationHelper createHelper = wb.getCreationHelper();
//设置样式
HSSFCellStyle titleSytle=(HSSFCellStyle) wb.createCellStyle();
titleSytle.setAlignment(HSSFCellStyle.ALIGN_CENTER_SELECTION);
titleSytle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
Sheet sheet = wb.createSheet("电脑明细表");
// Create a row and put some cells in it. Rows are 0 based.
sheet.addMergedRegion(new CellRangeAddress(0,1,0,4));
HSSFRow rt=null;
HSSFCell ct=null;
rt=(HSSFRow) sheet.createRow(0);
ct=rt.createCell(0);
ct.setCellStyle(titleSytle);
ct.setCellValue(new HSSFRichTextString("电脑信息表"));
HSSFCellStyle tableSytle=(HSSFCellStyle) wb.createCellStyle();
tableSytle.setBorderBottom((short)1);
tableSytle.setBorderLeft((short)1);
tableSytle.setBorderRight((short)1);
tableSytle.setBorderTop((short)1);
tableSytle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
Row row0 = sheet.createRow((short)1);
String[] title=new String[]{"id","电脑编码","电脑类别","使用店铺","责任人"};
List list=(List) request.getSession().getAttribute("pclist");
for(int i=0;i<title.length;i++){
Cell cell = row0.createCell(i);
cell.setCellValue(title[i]);
}
for(int i=0;i<list.size();i++){
Pc pc=new Pc();
pc=(Pc) list.get(i);
Row r = sheet.createRow((short)i+2);
String[] pcInfo=new String[]{String.valueOf(pc.getId()),pc.getPcId()
,pc.getPcType(),pc.getShopName(),pc.getUserName()};
for(int j=0;j<pcInfo.length;j++){
Cell c=r.createCell(j);
c.setCellStyle(tableSytle);
c.setCellValue(pcInfo[j]);
}
}
request.setAttribute("wb", wb);
return mapping.findForward("excel");
}
}
action返回了一个excel报表对象后跳转到struts中配置的页面
<action path="/toExcel"
type="com.vle.oa.action.ToExcelAction"
parameter="command"
scope="request">
<forward name="excel" path="/pc/excel.jsp"/>
</action> ：
在这里我使用的是struts1，struts2同样原理一样最后编写跳转的jsp
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
response.reset();
out.clear();
out=pageContext.pushBody();
response.setContentType("application/msexcel");
response.setHeader("Content-disposition","inline; filename=myexcel.xls"); //attachment
HSSFWorkbook wb = (HSSFWorkbook)request.getAttribute("wb");
OutputStream os = response.getOutputStream();
wb.write(os);
os.flush();
os.close();
%> 效果如下
：
