JAVA 导出 Excel 报表

//创建httpServletResponse对象
HttpServletResponse response = ServletActionContext.getResponse();

//设置Excel报表名称
String head = "事件报表";

//自动转换其格式
try {
    head = new String(head.getBytes("gb2312"), "ISO8859-1");
} catch (UnsupportedEncodingException e1) {
}

//生成报表名称
response.setHeader("Content-disposition","attachment;filename="+head+".xls");

try{
    //生成报表 表头
    String titles[] = new String[2];
    titles[0] = "表头内容1";
    titles[1] = "表头内容2";

    //创建OutputStream输出流
    OutputStream os = response.getOutputStream();
    //创建操作excel的Workbook对象  jxl的
    WritableWorkbook workbook;
    //实例化workbook
    workbook = Workbook.createWorkbook(os);
    //给excel创建一个sheet
    WritableSheet sheet = workbook.createSheet("报表sheet",0);

    /**设置标题**/
    //设置单元格
    sheet.mergeCells(0, 0, 2, 1);//合并单元格的    （ 最左列号[开始列 包含]  左上角的行号     最右列号[结束列  包含]   右下角的行号）
    // 设置字体 
    WritableFont wf = new WritableFont(WritableFont.ARIAL,15,WritableFont.BOLD,false,UnderlineStyle.NO_UNDERLINE,Colour.BLACK);
    WritableCellFormat wcf = new WritableCellFormat(wf);
    wcf.setAlignment(jxl.format.Alignment.CENTRE);
    //创建一行（一个行号的元素）
    Label label1 = new Label(0,0,"事件统计报表",wcf);//
    //将该单元格添加到该页
    sheet.addCell(label1);

    //创建表头
    for(int i = 0 ; i < 2 ; i++)
    {
        Label label = new Label(i,2,titles[i]);
        sheet.addCell(label);
    }

    /**填充表格内容**/
    //从第几行开始填充
    int curcount = 3;
    try {
        //注入第一列内容
        sheet.addCell(new jxl.write.Label(0, curcount,"内容")); 
        //注入第二列内容
        sheet.addCell(new jxl.write.Label(1, curcount,"内容")); 
        //跳到下一行
        curcount = curcount + 1

    } catch (Exception e) {
        return null;
    }

    //设置列宽
    sheet.setColumnView(0, 30);
    sheet.setColumnView(1, 30);

    workbook.write(); 
    workbook.close();
}
catch(Exception e)
{
    return "导出错误："+e.getMessage();
}
return null;