JSP导出Excel

<%@page    import="jxl.Workbook,com.ecc.emp.core.*,com.ecc.emp.data.*,com.ecc.emp.jdbc.ConnectionManager,jxl.format.VerticalAlignment,java.sql.*,jxl.write.*,jxl.format.UnderlineStyle,javax.sql.DataSource"%>
<%@page language="java" contentType="text/html; charset=UTF-8"%>
<%@taglib uri="/WEB-INF/CTP.tld" prefix="ctp"%>
<jsp:directive.page import="java.util.List"/>
<jsp:directive.page import="java.util.ArrayList"/>
<%@ include file="http://www.cnblogs.com/head.jsp" %>
 
<%
    Context context = (Context)request.getAttribute("context");String flag ="交易日期,交易时间,摘要,借方发生额,贷方发生额,对方账号,对方户名,单位卡号,主卡标识,用途,备注";
    IndexedCollection indexedCollection = (IndexedCollection)context.getDataElement("parentCardDetails");
    String[] sourceStrArray=flag.split(",");
    List selValList = new ArrayList();
    selValList.add("序号#");
    for(int i=0;i<sourceStrArray.length;i++){
        selValList.add(sourceStrArray[i]+"#");
    }
 
    WritableWorkbook book = null;

    if (indexedCollection == null || indexedCollection.size()<0) 
    {%>
    <script language="javascript">
        alert('对不起!当前条件没有数据，不能导出!');
        //history.go(-1);
    </script>
    <%
    }
    else 
    {
        response.reset();
        response.setContentType("charset=UTF-8");
        response.setContentType("application/vnd.ms-excel");
        String filename = "regularInform.xls";
        response.setHeader("Content-Disposition","attachment; filename=" + filename);
        //解决HTTPS不能下载的问题
        response.setHeader("Cache-Control","public");
        
        book = Workbook.createWorkbook(response.getOutputStream());

        //表头字体
        WritableCellFormat writableCellFormat = new WritableCellFormat();
        writableCellFormat.setAlignment(Alignment.CENTRE);
        writableCellFormat.setVerticalAlignment(VerticalAlignment.CENTRE);
        writableCellFormat.setWrap(true);
        WritableFont cellFont = new WritableFont(WritableFont.createFont("宋体"), 14, WritableFont.BOLD, false,
        UnderlineStyle.NO_UNDERLINE, Colour.BLACK);
        writableCellFormat.setFont(cellFont);
        writableCellFormat.setBorder(Border.ALL,
        BorderLineStyle.THIN);
        writableCellFormat.setBackground(Colour.SKY_BLUE,
        Pattern.SOLID);

        //标题字体（左对齐）
        WritableCellFormat writableCellFormat1 = new WritableCellFormat();
        writableCellFormat1.setAlignment(Alignment.CENTRE);
        writableCellFormat1.setVerticalAlignment(VerticalAlignment.CENTRE);
        writableCellFormat1.setWrap(false);
        WritableFont cellFont1 = new WritableFont(WritableFont.createFont("宋体"), 14, WritableFont.NO_BOLD, false,
        UnderlineStyle.NO_UNDERLINE, Colour.BLACK);
        writableCellFormat1.setFont(cellFont1);

        //数据字体（居中）
        WritableCellFormat writableCellFormat2 = new WritableCellFormat();
        writableCellFormat2.setAlignment(Alignment.CENTRE);
        writableCellFormat2.setVerticalAlignment(VerticalAlignment.CENTRE);
        writableCellFormat2.setWrap(true);
        WritableFont cellFont2 = new WritableFont(WritableFont.createFont("宋体"), 10, WritableFont.NO_BOLD, false,
        UnderlineStyle.NO_UNDERLINE, Colour.BLACK);
        writableCellFormat2.setFont(cellFont2);
        writableCellFormat2.setBorder(Border.ALL,BorderLineStyle.THIN);


        WritableSheet sheet = book.createSheet("Sheet1", 0);
        sheet = setSheetHeader(sheet, writableCellFormat, selValList);
        int startRow = 2;
        
        Label label1 = null;
        int m = 0;

        sheet.mergeCells(0, 0, selValList.size()-1, 0);
        
        
        if(indexedCollection!=null && indexedCollection.size()>0)
            {     
                        for (int i = 0; i < indexedCollection.size(); i++){        
                            KeyedCollection keyedCollection = (KeyedCollection) indexedCollection.get(i);
                               String TranDate=(String)keyedCollection.getDataValue("TranDate");//交易日期
                               String tt = (String)keyedCollection.getDataValue("TranTime");
                               tt = tt.substring(0,2)+":"+tt.substring(2,4);//交易时间
                               String narr=utb.nvl(keyedCollection.getDataValue("narr"), "--");//摘要
                               String entrAmt1=utb.formatMoney("DEBIT".equals((String)(keyedCollection.getDataValue("DCFlag")))?((String)keyedCollection.getDataValue("entrAmt")):"0.00");//借方发生额
                               String entrAmt2=utb.formatMoney("DEBIT".equals((String)(keyedCollection.getDataValue("DCFlag")))?"0.00":((String)keyedCollection.getDataValue("entrAmt")));//贷方发生额
                               String OppAc=utb.nvl(keyedCollection.getDataValue("OppAc"), "--");//对方账号
                               String OppacName=utb.nvl(keyedCollection.getDataValue("OppacName"), "--");//对方户名
                               String TransCardNo=utb.nvl(keyedCollection.getDataValue("TransCardNo"), "--");//单位卡号
                               String stdflag=(String)context.getDataValue("stdflag");
                               String cardNo=(String)context.getDataValue("parentCardNo");
                               String mainflag = "附";if(!"parent".equals(stdflag)){}else{mainflag = cardNo.equals((String)(keyedCollection.getDataValue("TransCardNo")))?"主":"附";}//主卡标识
                               String Usage=utb.nvl(keyedCollection.getDataValue("Usage"), "--");//用途
                               String ReMark=utb.nvl(keyedCollection.getDataValue("ReMark"), "--");//备注
                            int k = 0;
                            sheet.setRowView(startRow, 450);
                            label1 = new Label(k, startRow, (startRow-1)+"", writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                    
                            //(列，行，值，格式)
                            label1 = new Label(k, startRow,TranDate, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                            
                            label1 = new Label(k, startRow,tt, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                            
                            label1 = new Label(k, startRow,narr, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                            
                            label1 = new Label(k, startRow,entrAmt1, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                            
                            label1 = new Label(k, startRow,entrAmt2, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                                
                            label1 = new Label(k, startRow,OppAc, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                                
                            label1 = new Label(k, startRow,OppacName, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                                
                            label1 = new Label(k, startRow,TransCardNo, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                                
                            label1 = new Label(k, startRow,mainflag, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                                
                            label1 = new Label(k, startRow,Usage, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                                
                            label1 = new Label(k, startRow,ReMark, writableCellFormat2);
                            sheet.addCell(label1);
                            k++;
                            startRow = startRow+1;
                            
                            }
                          }
            book.write();
            try {
                book.close();
                response.flushBuffer();
            } catch (Exception e) {
                System.out.println("Excel is not exist!");
            }
            out = pageContext.pushBody();
        }


%><%!private static WritableSheet setSheetHeader(WritableSheet sheet,WritableCellFormat writableCellFormat, List selValList) throws Exception 
    {
        int i = 0;
        int j = 1;

        Label label = new Label(i, j, "序号", writableCellFormat);
        sheet.addCell(label);
        sheet.setColumnView(i, "序号".length() * 4);

        for(int w =1; w < selValList.size(); w++)
        {
            label = new Label(w, j, ((String)selValList.get(w)).split("#")[0], writableCellFormat);
            sheet.addCell(label);
            sheet.setColumnView(w, ((String)selValList.get(w)).split("#")[0].length() * 5);
        }
        return sheet;
    }
%>