java用jxl实现导出execl表格

//先将需要导出的数据放到list中

//然后将list中的数据放到execl表中

 @RequestMapping(params="exportExecl")
     public String exportExecl( HttpServletRequest request) throws IOException{
         List<Lanmu> list=new ArrayList<Lanmu>();
         list=lanmuBiz.findLmxx();
         int sure = ExcelUtils.createExcel(list,request);//生成execl
         if(sure==200){
             File file=new File("F://myeclipse+tomcat+jdk//apache-tomcat-7.0.26//webapps//Manage_ssm//exportLanmuExcel");
             Desktop.getDesktop().open(file);//打开文件所在位置
             return "redirect:lmxx.do?findLmxx";

         }else{
             return "view/luntan/errorExcel";
         }
     }
     

 public class ExcelUtils {

     private static final int SUCCESS = 200;
     private static final int FAIL = 500;

     public static int createExcel(List<Lanmu> list, HttpServletRequest req) {
         try {
             String path = "/exportLanmuExcel";
             path = req.getSession().getServletContext().getRealPath(path);

             File file  = new File(path);
             if(!file.exists()){
                 file.mkdirs();
             }
             OutputStream os = new FileOutputStream(path + "/" + "lanmuList" + ".xls");
             //创建工作薄
             WritableWorkbook workbook = Workbook.createWorkbook(os);
             //创建新的一页
             WritableSheet sheet = workbook.createSheet("First Sheet", 0);
             //构造表头
             sheet.mergeCells(0, 0, 2, 0);//添加合并单元格，第一个参数是起始列，第二个参数是起始行，第三个参数是终止列，第四个参数是终止行
             WritableFont bold = new WritableFont(WritableFont.ARIAL,12,WritableFont.BOLD);//设置字体种类和黑体显示,字体为Arial,字号大小为10,采用黑体显示
             WritableCellFormat titleFormate = new WritableCellFormat(bold);//生成一个单元格样式控制对象
             titleFormate.setAlignment(jxl.format.Alignment.CENTRE);//单元格中的内容水平方向居中
             titleFormate.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);//单元格的内容垂直方向居中
             Label title = new Label(0,0,"lanmuList",titleFormate);
             sheet.setRowView(0, 600, false);//设置第一行的高度
             sheet.addCell(title);
             //设置每一列的宽度
             for(int i=0;i<=2;i++){
                  sheet.setColumnView(i, 15);
             }

             //创建要显示的具体内容
             WritableFont color = new WritableFont(WritableFont.ARIAL,10,WritableFont.BOLD);//选择字体
             WritableCellFormat colorFormat = new WritableCellFormat(color);
             Label a1 = new Label(0,1,"序号",colorFormat);
             sheet.addCell(a1);
             Label a2 = new Label(1,1,"栏目名称",colorFormat);
             sheet.addCell(a2);
             Label a3 = new Label(2,1,"栏目状态",colorFormat);
             sheet.addCell(a3);

             //获取数据，将数据赋值到execl表格中
             for (int i = 2; i < list.size()+2; i++) {
                 Lanmu ap = list.get(i-2);
                 int xh = i-2;
                 String name = ap.getName();
                 String state=ap.getState();
                 if("1".equals(state)){
                     state = "普通用户栏目";
                 }else{
                     state = "管理员栏目";
                 }

                 // 创建第一个sheet
                 Label b1 = new Label(0,i,xh+"");
                 sheet.addCell(b1);
                 Label b2 = new Label(1,i,name);
                 sheet.addCell(b2);
                 Label b3 = new Label(2,i,state);
                 sheet.addCell(b3);

             }
             //把创建的内容写入到输出流中，并关闭输出流
             workbook.write();
             workbook.close();
             os.close();
             return SUCCESS;
         } catch (Exception e) {
             e.printStackTrace();
             return FAIL;
         }

     }

 }