用jxl导出资料创建多个sheet(克服大数据量的导出)

还有也许

用过jxl的一看就明白了
<%@page import="jxl.write.WritableFont,jxl.write.WritableCellFormat,java.sql.ResultSetMetaData,java.io.*,jxl.write.Label,java.net.*,jxl.write.WritableCell,jxl.write.WritableWorkbook,java.util.*,com.running.crm.model.*,jxl.Workbook,jxl.write.WritableSheet"contentType="application/x-msdownload" pageEncoding="utf-8"%><%OutputStream os = response.getOutputStream();WritableWorkbook wwb = Workbook.createWorkbook(os);Label label;response.setHeader("Content-disposition", "attachment; filename="+ URLEncoder.encode("客户资料", "utf-8") + ".xls");List customers=(List<Customer>)request.getAttribute("billResultSet");//String deptName=(String)request.getAttribute("deptName");int length=customers.size();//查询结果记录数int sheetSize=20000;int sheetNum=1;if(length%sheetSize>0){   sheetNum=length/sheetSize+1;}else{   sheetNum=length/sheetSize;}for(int kk=0;kk<sheetNum;kk++){        WritableSheet ws=wwb.createSheet(("查询结果"+kk),kk);          //设定第一行的行高         ws.setRowView(0,320);         //将第一列的宽度设为20                   ws.setColumnView(0,15);         ws.setColumnView(1,15);         ws.setColumnView(2,20);         ws.setColumnView(3,20);         ws.setColumnView(4,20);         ws.setColumnView(5,20);         ws.setColumnView(6,20);         ws.setColumnView(7,20);                     String ss[] = {"姓名","性别","手机号码","证件类型","证件号码","公司","家庭住址","爱好" };  for (int i = 0; i < 8; i++) { WritableFont arial12pt = new WritableFont(WritableFont.ARIAL,11, WritableFont.BOLD); WritableCellFormat arial12format = new WritableCellFormat(arial12pt); arial12format.setWrap(false); label = new Label(i, 0, ss[i], arial12format); ws.addCell(label);    }  for(int i = kk*sheetSize; i< (kk+1)*sheetSize ; i++ ){         if(i<length ){                   Customer customer = (Customer) customers.get(i);           for (int j = 0; j < 8; j++) {            switch(j){                case 0:label=new  Label(j, i+1-(kk*sheetSize), customer.getCustomerName());break;                case 1:label=new  Label(j,i+1-(kk*sheetSize), customer.getCustomerSex());break;                case 2:label=new  Label(j, i+1-(kk*sheetSize), customer.getPhoneNo());break;              //  case 3:lable=new  Label(j, i, customer.getCategoryName());break;                case 3:label=new  Label(j, i+1-(kk*sheetSize), customer.getCardType());break;                case 4:label=new  Label(j, i+1-(kk*sheetSize), customer.getCardId());break;                case 5:label=new  Label(j, i+1-(kk*sheetSize), customer.getCustomerCorp());break;                case 6:label=new  Label(j, i+1-(kk*sheetSize), customer.getHomeAddr());break;                case 7:label=new  Label(j, i+1-(kk*sheetSize), customer.getCustomerJoy());break;                default:label=new Label(j,i+1-(kk*sheetSize),"");                            }           ws.addCell(label);}           }else{                break;            }    } }  wwb.write();  wwb.close();  os.close();      out.clear();      out = pageContext.pushBody();  return;%>