Jeecg代码搬砖圣地第三篇(Excel导入导出)

1.导入

前端js和跳转页面

 <t:dgToolBar title="导入单一模板" icon="icon-put"    funname="Importonlyone"></t:dgToolBar>

function Importonlyone(title,url,gname) {
    gridname=gname;
    var ids = [];
    var rows = $("#"+gname).datagrid('getSelections'); 
   　if(rows.length==1){
        openuploadwin('Excel导入', 'decMainController.do?upload&num=1&ids='+rows[0].id, "decMainList");
    } 

}

<t:formvalid formid="formobj" layout="div" dialog="true" beforeSubmit="upload">
    <fieldset class="step">
    <div class="form"><t:upload name="fiels" buttonText="选择要导入的文件" uploader="${controller_name}.do?${empty method_name?'importExcel':method_name }" extend="*.xls;*.xlsx" id="file_upload" formData="documentTitle"></t:upload></div>
    <div class="form" id="filediv" style="height: 50px"></div>
    </fieldset>
</t:formvalid>

后台跳转方法及导入解析

　　　　　@RequestMapping(params = "upload")
         public ModelAndView upload(HttpServletRequest req) {
          　 req.setAttribute("controller_name","decMainController"); 
             req.setAttribute("method_name","importonlyone");
             req.setAttribute("ids", req.getParameter("ids"));  　　　　　　  return new ModelAndView("com/jeecg/decmain/pub_excel_upload"); 
         }

 　　　　　　    @SuppressWarnings("unchecked")
               @RequestMapping(params = "importonlyone", method = RequestMethod.POST)
               @ResponseBody
               public AjaxJson importonlyone(HttpServletRequest request, HttpServletResponse response) throws Exception {
                   AjaxJson j = new AjaxJson(); 
                    MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
                    List<MultipartFile> contactFile= new ArrayList<MultipartFile>();
                    Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
                    for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()) {
                        MultipartFile file = entity.getValue();// 获取上传文件对象
                    　　 contactFile.add(file);
                　　} 
                    XSSFWorkbook wb;//2007以前的是HSSFWorkbook
                    // 页
                    XSSFSheet sheet;//成品表
                    // 行
                    XSSFRow row;//成品表行
                    // 打开文件
                    try {
                          wb = new XSSFWorkbook(contactFile.get(0).getInputStream());
                    } catch (IOException e) {
                        e.printStackTrace();
                        wb = new XSSFWorkbook();
                    }
                    sheet = wb.getSheetAt(0);
                    int rowNum = sheet.getLastRowNum();
                    DecMainPage decMainPage=new DecMainPage();
                    row=sheet.getRow(1);
                    String ieflag=getCellFormatValue(row.getCell(1));//进出口标识
　　　　　　　　　　}

private String getCellFormatValue(XSSFCell xssfCell) {
String cellvalue = "";
if (xssfCell != null) {
// 判断当前Cell的Type
switch (xssfCell.getCellType()) {
// 如果当前Cell的Type为NUMERIC
case XSSFCell.CELL_TYPE_NUMERIC:
case XSSFCell.CELL_TYPE_FORMULA: {
// 判断当前的cell是否为Date
if (HSSFDateUtil.isCellDateFormatted(xssfCell)) {
Date date = xssfCell.getDateCellValue();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
cellvalue = sdf.format(date);
}
// 如果是纯数字
else {
// 取得当前Cell的数值
cellvalue = String.valueOf(xssfCell.getNumericCellValue());
}
break;
}
// 如果当前Cell的Type为STRIN
case XSSFCell.CELL_TYPE_STRING:
// 取得当前的Cell字符串
cellvalue = xssfCell.getRichStringCellValue().getString();
break;
// 默认的Cell值
default:
cellvalue = " ";
}
} else {
cellvalue = "";
}
return cellvalue;
}

 2.导出

前台js：

  <t:dgToolBar title="导出" icon="icon-putout"    funname="newbaoguan"></t:dgToolBar>

 　　　　　　　　　　function newbaoguan(title,url, id,width,height,isRestful) {
                     gridname=id;
                     var rowsData = $('#'+id).datagrid('getSelections');
                     if (!rowsData || rowsData.length==0) {
                         tip('请选择导出项目');
                         return;
                     }
                     if (rowsData.length>1) {
                         tip('请选择一条记录再导出');
                         return;
                     }
                     if (rowsData.length==1) { 
                         JeecgExcelExport("decMainController.do?newbaoguan&ids="+rowsData[0].id,"decMainList");
                     }
                     
                 }

后台java代码

  @RequestMapping(params = "newbaoguan")
              public void newbaoguan(HttpServletRequest request,HttpServletResponse response,ModelMap modelMap,OutputStream output) throws IOException {
                  　　　　　　　　　　Workbook tempWorkBook = null; 
                                   String lujing=request.getSession().getServletContext().getRealPath("/");
                                   String lujing1=lujing+"export\template\newbaoguancus20180918.xls";
                                　　InputStream in = new FileInputStream(new File(lujing1));
                               　　 HSSFWorkbook work = new HSSFWorkbook(in);
                               　　 HSSFSheet sheetModel =work.getSheetAt(0);
                               　　 HSSFSheet newSheet = work.createSheet("Sheet"+(i+2));
                                   copySheet(work, sheetModel, newSheet, sheetModel.getFirstRowNum(), sheetModel.getLastRowNum());
                                   HSSFCellStyle setBorder = (HSSFCellStyle)work.createCellStyle();
                                   setBorder.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
                                   setBorder.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
                                   HSSFCellStyle setBorder1 = (HSSFCellStyle)work.createCellStyle();
                                   setBorder1.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
                                   HSSFCellStyle setBorder2 = (HSSFCellStyle)work.createCellStyle();
                                   setBorder2.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
                                   HSSFRow row = newSheet.getRow(1);
                                   HSSFCell cell = row.getCell(1);
                                   cell.setCellValue(""); 
                     
                    response.reset();
                    response.setCharacterEncoding("UTF-8");
                    response.setContentType("application/vnd.ms-excel");  //保证不乱码
                    try
                    {
                        Date date=new Date();
                        SimpleDateFormat format=new SimpleDateFormat("MMddHHmmss");
                        String time="im"+format.format(date)+".xls";
                        response.setHeader("Content-Disposition","attachment;" + " filename=" + new String(time.getBytes("utf-8"), "ISO-8859-1"));

                    }
                    catch (UnsupportedEncodingException e1)
                    {
                        // TODO Auto-generated catch block
                        e1.printStackTrace();
                    }
                    try
                    {
                        ByteArrayOutputStream oss =new  ByteArrayOutputStream();
                        OutputStream os = response.getOutputStream();
                        work.write(oss);

                        byte temp[] = oss.toByteArray();
                        ByteArrayInputStream in1 = new ByteArrayInputStream(temp);
                        int n = 0;
                        while ((n = in1.read(temp)) >0) {
                             os.write(temp, 0, n);
                         }
                        os.flush();
                        os.close();
                    } catch(Exception e)
                    {
                        e.printStackTrace();
                    }
    }