（1）住房信息添加

Controller：

@RequestMapping("/add")
    public String add(Home home, Model model) throws IOException{

        String sqlPath = null;
        //定义文件保存的本地路径
        String localPath="D:\\AnZhuang\\Java项目\\选题\\Xin-XiangMu\\Hotel_Manage-master\\src\\main\\webapp\\upload\\";
        //定义 文件名
        String filename=null;
        if(!home.getFile().isEmpty()){
            //生成uuid作为文件名称
            String uuid = UUID.randomUUID().toString().replaceAll("-","");
            //获得文件类型（可以判断如果不是图片，禁止上传）
            String contentType=home.getFile().getContentType();
            //获得文件后缀名
            String suffixName=contentType.substring(contentType.indexOf("/")+1);
            //得到 文件名
            filename=uuid+"."+suffixName;
            System.out.println(filename+"图片名字");
            //文件保存路径
            home.getFile().transferTo(new File(localPath+filename));
        }
        //把图片的相对路径保存至数据库
        sqlPath = "/upload/"+filename;
        System.out.println(sqlPath);
        home.setImg(sqlPath);

        homeService.addHome(home);
        model.addAttribute("home",home);
        return ("redirect:/home/list");
    }

Service 

 

Dao

（2）Excel文件导出

页面跳转： 

导出

Controller：

 @RequestMapping("/home")
    public void excel_home(HttpServletResponse response )throws IOException {

        response.setCharacterEncoding("UTF-8");
        List<Home> homeList=homeService.queryAllHome();
        //创建excel文件
        HSSFWorkbook wb = new HSSFWorkbook();
        //创建sheet页
        HSSFSheet sheet = wb.createSheet("房间信息");
        //创建标题行
        HSSFRow titleRow = sheet.createRow(0);
        titleRow.createCell(0).setCellValue("编号");
        titleRow.createCell(1).setCellValue("房间号");
        titleRow.createCell(2).setCellValue("房间类型");
        titleRow.createCell(3).setCellValue("价格");
        titleRow.createCell(4).setCellValue("状态");
        titleRow.createCell(5).setCellValue("描述");

        for(Home home:homeList){
            HSSFRow dataRow = sheet.createRow(sheet.getLastRowNum()+1);
            dataRow.createCell(0).setCellValue(home.getId());
            dataRow.createCell(1).setCellValue(home.getNum());
            dataRow.createCell(2).setCellValue(home.getH_Type());
            dataRow.createCell(3).setCellValue(home.getPrice());
            dataRow.createCell(4).setCellValue(home.getState());
            dataRow.createCell(5).setCellValue(home.getText());
        }

        // 设置下载时客户端Excel的名称
        response.setContentType("application/octet-stream;charset=utf-8");
        response.setHeader("Content-Disposition", "attachment;filename="
                + new String("房间信息表".getBytes(),"iso-8859-1") + ".xls");

        OutputStream ouputStream = response.getOutputStream();
        wb.write(ouputStream);
        ouputStream.flush();
        ouputStream.close();

    }

Service： 

 

Dao

（3）前端定时器

               !(function run(wait){
                    if(wait <= 0) {
                        location.href = "/jump/index";
                    }else{
                        wait--;
                        setTimeout(function(){
                            document.getElementById("wait").innerHTML = wait;
                            run(wait);
                        },1000);
                    }
                })(3);