按鈕

   <a href="###" class="eui-btn eui-btn-small" onclick="Export()"><i class="eui-icon" >&#xe7fb;</i>模板下載</a>

javascript

   //導出數據
    function  Export() {
        window.open("/Summary/excelExport");

    }

控制器

 //導出
    @RequestMapping("/excelExport")
    @ResponseBody
    
 
public void excelExport(String params, HttpServletRequest
            request , HttpServletResponse response,String projectCode
            ,String projectName,String engineeringName,Integer status,String creatorName,String creatororgname,String createTime,String providername) throws Exception{

        BufferedInputStream 
 
in = null;
        BufferedOutputStream out = null;
        SimpleDateFormat sdf1=new SimpleDateFormat("yyyy-MM-dd");//小寫的mm表示的是分鐘

        // path是指欲下載的文件的路徑。
        /*File file = new File(path);*/
        //創建excel
        HSSFWorkbook wb = new HSSFWorkbook();
        String fileName = "科目信息表.xls";//導出時下載的EXCEL文件名
        
 
//創建sheet
        HSSFSheet sheet = wb.createSheet("科目信息");
        sheet.setDefaultColumnWidth(10);
        sheet.setDefaultRowHeightInPoints(20);
        //創建一行
        HSSFRow rowTitle = sheet.createRow(0);
        rowTitle.setHeightInPoints(20);

        HSSFCellStyle styleTitle = wb.createCellStyle();
        styleTitle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 居中

        HSSFCellStyle styleCenter = wb.createCellStyle();
        styleCenter.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 居中
        styleCenter.setWrapText(true); // 設置為自動換行

        // 在行上創建1列
        HSSFCell cellTitle = rowTitle.createCell(0);
        // 列標題及樣式
        cellTitle.setCellValue("科目ID");
        cellTitle.setCellStyle(styleTitle);

        // 在行上創建2列
        cellTitle = rowTitle.createCell(1);
        cellTitle.setCellValue("科目名稱");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(2);
        cellTitle.setCellValue("上年實際");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(3);
        cellTitle.setCellValue("本年預算");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(4);
        cellTitle.setCellValue("1月");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(5);
        cellTitle.setCellValue("2月");
        cellTitle.setCellStyle(styleTitle);

        cellTitle = rowTitle.createCell(6);
        cellTitle.setCellValue("3月");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(7);
        cellTitle.setCellValue("4月");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(8);
        cellTitle.setCellValue("5月");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(9);
        cellTitle.setCellValue("6月");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(10);
        cellTitle.setCellValue("7月");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(11);
        cellTitle.setCellValue("8月");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(12);
        cellTitle.setCellValue("9月");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(13);
        cellTitle.setCellValue("10月");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(14);
        cellTitle.setCellValue("11月");
        cellTitle.setCellStyle(styleTitle);
        cellTitle = rowTitle.createCell(15);
        cellTitle.setCellValue("12月");
        cellTitle.setCellStyle(styleTitle);

        List<BudgetDetail> budgetDetails=budgetDetailService.ExcelInfo();
        for(int i=0;i<budgetDetails.size();i++){
            BudgetDetail budgetDetail = budgetDetails.get(i);
            HSSFRow row = sheet.createRow(i + 1);
            row.setHeightInPoints(20);


            HSSFCell cell = row.createCell(0);
            cell.setCellValue(budgetDetail.getSubid());//科目ID
            cell.setCellStyle(styleCenter);

            cell = row.createCell(1);
            cell.setCellValue(budgetDetail.getSubname());//科目名稱
            cell.setCellStyle(styleCenter);
        }

        String path="c:/aaaa.xls";
        String path2="D:/aaaa.xls";
        FileOutputStream fout = null;
        try{
            fout = new FileOutputStream(path);
        }catch (Exception e){
            fout = new FileOutputStream(path2);
        }
        wb.write(fout);
        fout.close();
        wb.close();
        try {
            try {
                InputStream inputStream = new FileInputStream(ResourceUtils.getFile(path));
                fileName = URLEncoder.encode(fileName, "UTF-8");
                response.setContentType("applicationnd/octet-stream");
                response.setCharacterEncoding("UTF-8");
                response.setHeader("Content-Disposition", "attachment; filename="+fileName);
                in = new BufferedInputStream(inputStream);
                out = new BufferedOutputStream(response.getOutputStream());
            }catch (Exception e){
                InputStream inputStream = new FileInputStream(ResourceUtils.getFile(path2));
                fileName = URLEncoder.encode(fileName, "UTF-8");
                response.setContentType("applicationnd/octet-stream");
                response.setCharacterEncoding("UTF-8");
                response.setHeader("Content-Disposition", "attachment; filename="+fileName);
                in = new BufferedInputStream(inputStream);
                out = new BufferedOutputStream(response.getOutputStream());
            }
            byte[] data = new byte[1024];
            int len = 0;
            while (-1 != (len=in.read(data, 0, data.length))) {
                out.write(data, 0, len);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (in != null) {
                in.close();
            }
            if (out != null) {
                out.close();
            }

            File f = new File(path);
            if (f.exists()){
                f.delete();//刪除
            }
            File f1=new File(path2);
            if (f1.exists()){
                f1.delete();
            }
        }

    }

java 導出