jxl导出excel。 ExcelJ#freemarkerCacheJSP

最近在做exce的导出，用的是jxl，感觉上没有什么难处，但是哪个单元格的合并和填充值的时候感觉好难。
贴出来让大家看看，看看哪里还有不妥之处：
页面也就是一个jsp页面没啥可说的。

由于用的struts2，所有在struts2的action中添加了：如下：
response.setContentType("application/vnd.ms-excel;charset=utf-8");
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", 0);
而后又写了一个jxl的导出的类：
package com.ruling.cost.utils;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import freemarker.log.Logger;

import jxl.Cell;
import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.Colour;
import jxl.format.UnderlineStyle;
import jxl.write.DateTime;
import jxl.write.Label;
import jxl.write.NumberFormat;
import jxl.write.NumberFormats;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.JxlWriteException;
import jxl.write.biff.RowsExceededException;
import jxl.write.Number;

public class JxlExceptor {
//private static Logger log = Logger.getLogger(JxlExceptor.class);
OutputStream out;
// BufferedOutputStream bos;
private static JxlExceptor jxl = null;
private WritableWorkbook write = null;
WritableSheet sheet = null;
Label label = null;
Number num = null;
DateTime date = null;

WritableCellFormat headerFormat;
WritableCellFormat headtoFormat;
WritableCellFormat titleFormat;
WritableCellFormat otherFormat;
WritableCellFormat detFormat;
WritableCellFormat numFormat;
WritableCellFormat dateFormat;
WritableCellFormat headertitleFormat;// 报表第二标题样式。
WritableCellFormat floatFormat;

private JxlExceptor() {
};

public static JxlExceptor getInstence() {
if (jxl == null)
jxl = new JxlExceptor();
return jxl;
}
public void exportExcelMianMethod(HttpServletResponse response, String title)
throws IOException {
    out = response.getOutputStream();
   write = Workbook.createWorkbook(out);
   response.setContentType("aplication/vnd.ms-excel");
    response.addHeader("Content-Disposition", "inline; filename="
+ new String(title.getBytes("GB2312"), "ISO8859_1") + ".xls"); // 有中文必须转码
}
public void exportFormatDate() throws WriteException {

WritableFont headerFont = new WritableFont(WritableFont.ARIAL, 12,
WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE,
Colour.BLACK);
// 表头样式
headerFormat = new WritableCellFormat(headerFont);
// 文字水平居中对齐
headerFormat.setAlignment(Alignment.CENTRE);

// 表头信息
WritableFont allToFont = new WritableFont(WritableFont.ARIAL, 10,
WritableFont.NO_BOLD, false, UnderlineStyle.NO_UNDERLINE,
Colour.BLACK);
headtoFormat = new WritableCellFormat(allToFont);
headtoFormat.setAlignment(Alignment.LEFT);

// 标题样式
titleFormat = new WritableCellFormat(allToFont);
titleFormat.setAlignment(Alignment.CENTRE);
titleFormat.setBackground(Colour.getInternalColour(22));
titleFormat.setBorder(Border.ALL, BorderLineStyle.THIN, Colour.BLACK);

// 显示数据样式
detFormat = new WritableCellFormat(allToFont);
// 文字水平靠右对齐
detFormat.setAlignment(Alignment.RIGHT);
detFormat.setBorder(Border.ALL, BorderLineStyle.THIN, Colour.BLACK);
headertitleFormat = new WritableCellFormat(allToFont);
headertitleFormat.setAlignment(Alignment.CENTRE);
NumberFormat fivedps1 = new NumberFormat("#.00");
floatFormat = new WritableCellFormat (fivedps1);
jxl.write.NumberFormat cnf=  new jxl.write.NumberFormat("###,###,###,###,###.00");
jxl.write.WritableCellFormat cwcfN =   new jxl.write.WritableCellFormat(cnf);
cwcfN.setBorder(Border.ALL, BorderLineStyle.THIN);




}
public void getExcerByuser1(String filename,List listitem,List userlist,List list,HttpServletResponse response){
try {

exportExcelMianMethod(response, filename);
exportFormatDate();
sheet=write.createSheet("title",0);
sheet.mergeCells(0, 0, 0, 1);
sheet.setRowView(0, 500);
label = new Label(0, 0, "title", headerFormat);
sheet.addCell(label);
sheet.mergeCells(1,0,userlist.size(),0);
label = new Label(1, 0, "user", headerFormat);
sheet.addCell(label);
int healen = userlist.size();//添加user列表
for (int i = 0; i < healen; i++) {
Map map=(Map) userlist.get(i);
label = new Label(i+1,1,map.get("key").toString(), titleFormat);
sheet.addCell(label);

}
label = new Label(healen+1,1,"统计", titleFormat);
sheet.addCell(label);
int margelent=listitem.size();// for(int j=0;j<margelent;j++){// Map map=(Map) listitem.get(j);
label = new Label(0, j+2,map.get("key").toString(),titleFormat);
sheet.addCell(label);
}
//添加單元格內容
int size=0;
for(int i=0;i<list.size()-1;i++){
List itemlist=(List) list.get(i);// size=itemlist.size();// for(int j=0;j<itemlist.size();j++){
label = new Label(i+1,2+j,itemlist.get(j).toString(),detFormat);
sheet.addCell(label);
}
List zongjilist=(List) list.get(list.size()-1);
for(int z=0;z<margelent;z++){
label = new Label(healen+1,z+2,zongjilist.get(z).toString(),detFormat);
sheet.addCell(label);
}
}
label = new Label(0,size+1,"总计",titleFormat);
sheet.addCell(label);

write.write();
}
catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
try {
write.close();
//out.close();
} catch (IOException e) {
e.printStackTrace();
} catch (WriteException e) {
e.printStackTrace();
}
}

}
public void getExcerByuser2(String filename,List listitem,List userlist,List list,HttpServletResponse response){
try {

exportExcelMianMethod(response, filename);
exportFormatDate();
sheet=write.createSheet("test",0);
sheet.mergeCells(0, 0, 0, 1);
sheet.setRowView(0, 500);
label = new Label(0, 0, "title", headerFormat);
sheet.addCell(label);
sheet.mergeCells(1,0,userlist.size(),0);
label = new Label(1, 0, "user", headerFormat);
sheet.addCell(label);
int healen = userlist.size(); for (int i = 0; i < healen; i++) {
Map map=(Map) userlist.get(i);
label = new Label(i+1,1,map.get("key").toString(), titleFormat);
sheet.addCell(label);

}
label = new Label(healen+1,1,"统计", titleFormat);
sheet.addCell(label);
int margelent=listitem.size();/ for(int j=0;j<margelent;j++){//
Map map=(Map) listitem.get(j);
label = new Label(0, j+2,map.get("key").toString(),titleFormat);
sheet.addCell(label);
}
//添加單元格內容
int size=0;
for(int i=0;i<list.size()-1;i++){// List itemlist=(List) list.get(i);// size=itemlist.size();// for(int j=0;j<itemlist.size();j++){
num = new jxl.write.Number(i+1,2+j,Double.parseDouble(itemlist.get(j).toString()),floatFormat);
sheet.addCell(num);
}
List zongjilist=(List) list.get(list.size()-1);
for(int z=0;z<margelent;z++){
num = new Number(healen+1,z+2,Double.parseDouble(zongjilist.get(z).toString()),floatFormat);
sheet.addCell(num);
}
}
label = new Label(0,size+1,"总计",titleFormat);
sheet.addCell(label);

write.write();
}
catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
try {
write.close();
//out.close();
} catch (IOException e) {
e.printStackTrace();
} catch (WriteException e) {
e.printStackTrace();
}
}

}
}