springmvc 导出excel

1. // 导出excel方法 
2. @RequestMapping("exportExcel") 
3. public void exportExcel(HttpServletRequest request, HttpServletResponse response) 
4. { 
5.      HttpSession session = request.getSession(); 
6.      session.setAttribute("state", null); 
7.      // 生成提示信息， 
8.      response.setContentType("application/vnd.ms-excel"); 
9.      String codedFileName = null; 
10.      OutputStream fOut = null; 
11.      try 
12.      { 
13.          // 进行转码，使其支持中文文件名 
14.          codedFileName = java.net.URLEncoder.encode("中文", "UTF-8"); 
15.          response.setHeader("content-disposition", "attachment;filename=" + codedFileName + ".xls"); 
16.          // response.addHeader("Content-Disposition", "attachment;   filename=" + codedFileName + ".xls"); 
17.          // 产生工作簿对象 
18.          HSSFWorkbook workbook = new HSSFWorkbook(); 
19.          //产生工作表对象 
20.          HSSFSheet sheet = workbook.createSheet(); 
21.          for (int i = 0; i <= 30000; i++) 
22.          { 
23.              HSSFRow row = sheet.createRow((int)i);//创建一行 
24.              HSSFCell cell = row.createCell((int)0);//创建一列 
25.              cell.setCellType(HSSFCell.CELL_TYPE_STRING); 
26.              cell.setCellValue("测试成功" + i); 
27.          } 
28.          fOut = response.getOutputStream(); 
29.          workbook.write(fOut); 
30.      } 
31.      catch (UnsupportedEncodingException e1) 
32.      {} 
33.      catch (Exception e) 
34.      {} 
35.      finally 
36.      { 
37.          try 
38.          { 
39.              fOut.flush(); 
40.              fOut.close(); 
41.          } 
42.          catch (IOException e) 
43.          {} 
44.          session.setAttribute("state", "open"); 
45.      } 
46.      System.out.println("文件生成..."); 
47. } 
48. @RequestMapping("check") 
49. public void check(HttpServletRequest request, HttpServletResponse response) 
50. { 
51.      try 
52.      { 
53.          if ("open".equals(request.getSession().getAttribute("state"))) 
54.          { 
55.              request.getSession().setAttribute("state", null); 
56.              response.getWriter().write("true"); 
57.              response.getWriter().flush(); 
58.          } 
59.          else 
60.          { 
61.              response.getWriter().write("false"); 
62.              response.getWriter().flush(); 
63.          } 
64.      } 
65.      catch (IOException e) 
66.      {} 
67. } 

   // 导出excel方法
    @RequestMapping("exportExcel")
    public void exportExcel(HttpServletRequest request, HttpServletResponse response)
    {
        HttpSession session = request.getSession();
        session.setAttribute("state", null);
        // 生成提示信息，
        response.setContentType("application/vnd.ms-excel");
        String codedFileName = null;
        OutputStream fOut = null;
        try
        {
            // 进行转码，使其支持中文文件名
            codedFileName = java.net.URLEncoder.encode("中文", "UTF-8");
            response.setHeader("content-disposition", "attachment;filename=" + codedFileName + ".xls");
            // response.addHeader("Content-Disposition", "attachment;   filename=" + codedFileName + ".xls");
            // 产生工作簿对象
            HSSFWorkbook workbook = new HSSFWorkbook();
            //产生工作表对象
            HSSFSheet sheet = workbook.createSheet();
            for (int i = 0; i <= 30000; i++)
            {
                HSSFRow row = sheet.createRow((int)i);//创建一行
                HSSFCell cell = row.createCell((int)0);//创建一列
                cell.setCellType(HSSFCell.CELL_TYPE_STRING);
                cell.setCellValue("测试成功" + i);
            }
            fOut = response.getOutputStream();
            workbook.write(fOut);
        }
        catch (UnsupportedEncodingException e1)
        {}
        catch (Exception e)
        {}
        finally
        {
            try
            {
                fOut.flush();
                fOut.close();
            }
            catch (IOException e)
            {}
            session.setAttribute("state", "open");
        }
        System.out.println("文件生成...");
    }
    @RequestMapping("check")
    public void check(HttpServletRequest request, HttpServletResponse response)
    {
        try
        {
            if ("open".equals(request.getSession().getAttribute("state")))
            {
                request.getSession().setAttribute("state", null);
                response.getWriter().write("true");
                response.getWriter().flush();
            }
            else
            {
                response.getWriter().write("false");
                response.getWriter().flush();
            }
        }
        catch (IOException e)
        {}
    }

Js代码

1. /***********导出start************/ 
2.     var excel_flag = 0; 
3.     var win_check; 
4.     var exportExcelBtn = new Ext.Button({ 
5.         renderTo:'exportExcelBtn', 
6.         text:"<span class='marL10'>"+'导出'+"</span>", 
7.         height:24, 
8.         iconCls:'findnew', 
9.         width:110, 
10.         bodyStyle:'padding:5px', 
11.         handler: function() 
12.         { 
13.             excel_flag = 0; 
14.             //禁用按钮 
15.             exportExcelBtn.disable(); 
16.             location.href = "exportExcel"; 
17.             //每隔一秒向后台发送请求 
18.             win_check = window.setInterval(check, 1000);   
19.         } 
20.     }); 
21.      
22.     /**
23.      * 用于防止重复提交
24.      */ 
25.     function check() 
26.     { 
27.         excel_flag ++; 
28.         if(excel_flag > 30) 
29.         { 
30.             //清空定时器 
31.             window.clearInterval(win_check); 
32.             //启用按钮 
33.             exportExcelBtn.enable(); 
34.         } 
35.         Ext.Ajax.request( 
36.             { 
37.                 url : 'check', 
38.                 success : function (response, result) 
39.                 { 
40.                     if(response.responseText=="true") 
41.                     { 
42.                         //清空定时器 
43.                         window.clearInterval(win_check); 
44.                         //启用按钮 
45.                         exportExcelBtn.enable(); 
46.                     } 
47.                 } 
48.             }) 
49.     } 
50.     /***********导出end*****************/