Spring Boot学习笔记----POI（Excel导入导出）

业务:动态生成模板导出Excel,用户修改完再导入Excel.

Spring boot + bootstrap + poi

1.添加Dependence

    org.apache.poi
    poi
    3.17



    org.apache.poi
    poi-ooxml
    3.17

前者用于引入HSSFWorkbook；后者用于引入XSSFWorkbook.

2.生成模板并导出Excel

 

//生成模板
function modleCreate(){
    //清空数据
    var oaId= $("#adjOAId").val();
    var adjOrg= $("#adjOrg").val();
    var adjDepart=$("#adjDepart").val();
    var adjSubject=$("#adjSubject").val();
    window.location.href="budgetOaController/exportTemplate?adjOrg="+ adjOrg +"&&adjDepart=" +adjDepart +"&&adjSubject="+adjSubject+"&&oaId="+oaId;
}    

    @RequestMapping(value="/exportTemplate",method=RequestMethod.GET) 
    public void exportTemplate(HttpServletResponse response,@RequestParam String adjOrg,@RequestParam String adjSubject,
            @RequestParam String adjDepart,@RequestParam String oaId) throws IOException{
             // 声明一个工作薄        
            HSSFWorkbook workbook = new HSSFWorkbook();
            //创建一个Excel表单,参数为sheet的名字
            HSSFSheet sheet = workbook.createSheet("模板表");
            //创建表头
            setTitle(workbook, sheet);
            List> oalist = budgetAdjustService.getOainform(oaId);
            //新增数据行，并且设置单元格数据
                HSSFRow hssfRow = sheet.createRow(1);
                for(Map map :oalist) {
                hssfRow.createCell(0).setCellValue(map.get("adjustType")+"");
               hssfRow.createCell(1).setCellValue(map.get("applyDate")+"");
               hssfRow.createCell(2).setCellValue(map.get("processCode")+"");
               hssfRow.createCell(3).setCellValue(map.get("applyOrganization")+"");
               hssfRow.createCell(4).setCellValue(map.get("applyDepartment")+"");
               hssfRow.createCell(5).setCellValue(map.get("flag")+"");
                }
            hssfRow.createCell(6).setCellValue(adjOrg);
            hssfRow.createCell(7).setCellValue(adjDepart);
            hssfRow.createCell(8).setCellValue(adjSubject);
                 /*hssfRow.createCell(1).setCellValue(budgetadjust.getApplyDate());
                 hssfRow.createCell(2).setCellValue(budgetadjust.getProcessCode());
                 hssfRow.createCell(3).setCellValue(budgetadjust.getApplyOrganization());
                 hssfRow.createCell(4).setCellValue(budgetadjust.getApplyDepartment());
                 hssfRow.createCell(5).setCellValue(budgetadjust.getFlag());
                 hssfRow.createCell(6).setCellValue(budgetadjust.getExportorganization());
                 hssfRow.createCell(7).setCellValue(budgetadjust.getExportdepartment());
                 hssfRow.createCell(8).setCellValue(budgetadjust.getExportsubject());
             }*/
            // SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
             String fileName = "Template -" + new Date().getTime() + ".xls";
            //清空response  
            response.reset();  
            //设置response的Header  
            response.addHeader("Content-Disposition", "attachment;filename="+ fileName);  
            OutputStream os = new BufferedOutputStream(response.getOutputStream());  
            response.setContentType("application/vnd.ms-excel;charset=gb2312"); 
            //将excel写入到输出流中
            workbook.write(os);
            os.flush();
            os.close();
        }

    // 创建表头
    private void setTitle(HSSFWorkbook workbook, HSSFSheet sheet) {
        HSSFRow row = sheet.createRow(0);
        // 设置列宽，setColumnWidth的第二个参数要乘以256，这个参数的单位是1/256个字符宽度
        sheet.setColumnWidth(8, 60 * 256);
        // 设置为居中加粗
        HSSFCellStyle style = workbook.createCellStyle();
        HSSFFont font = workbook.createFont();
        font.setBold(true);
        style.setFont(font);
        //导出的Excel头部
        String[] headers = { "调整类型", "申请日期", "OA流程编号", "申请组织", "申请部门", "是否涉及人力成本", "调出组织", "调出部门", "调出科目", "调出月份",
                "调出金额", "查询费控系统", "调入组织", "调入部门", "调入科目", "调入月份", "调入金额", "调整原因" };
        // 设置表格默认列宽度为15个字节
        sheet.setDefaultColumnWidth((short) 16);
        for (short i = 0; i < headers.length; i++) {
            HSSFCell cell = row.createCell(i);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
            cell.setCellStyle(style);
        }
    }

 2.1 导出结果

3.导入Excel

    

        

            

                OA预算调整模板导入
            
                

                    

                        

                            

                                

                                    

                                        导入文件
                                        

                                            
                                        
                                        上传
                                    
                                
                                
                            
                        
                    
                    

                        导入结果反馈
                        

                        
                    
                
                    
        
    

    // 导入Excel
    @RequestMapping(value = "upload", method = RequestMethod.POST)
    public AjaxResultJson upload(MultipartFile file) {
        AjaxResultJson result = new AjaxResultJson();
        if (file == null) {
            result.setMsg("file不能为空");
            result.setObj("Excel导入失败");
            return result;
        }
        List list = new ArrayList<>();
　　　　 String fileName = file.getOriginalFilename(); //获取文件名
        try {
            HSSFWorkbook workbook = new HSSFWorkbook(new POIFSFileSystem(file.getInputStream()));
            // 有多少个sheet
            int sheets = workbook.getNumberOfSheets();
            for (int i = 0; i < sheets; i++) {
                HSSFSheet sheet = workbook.getSheetAt(i);
                // 获取多少行
                int rows = sheet.getPhysicalNumberOfRows();
                Budgetadjust budgetadjust = null;
                // 遍历每一行，注意：第 0 行为标题
                for (int j = 1; j < rows; j++) {
                    budgetadjust = new Budgetadjust();
                    // 获得第 j 行
                    HSSFRow row = sheet.getRow(j);
                    budgetadjust.setAdjustType(row.getCell(0).toString());// 调整类型
                    budgetadjust.setApplyDate(row.getCell(1).toString());// 申请日期
                    budgetadjust.setProcessCode(row.getCell(2).toString());// OA流程编号
                    budgetadjust.setApplyOrganization(row.getCell(3).toString());// 申请组织
                    budgetadjust.setApplyDepartment(row.getCell(4).toString());// 申请部门
                    budgetadjust.setFlag(row.getCell(5).toString());// 是否涉及人力成本

                    budgetadjust.setExportorganization(row.getCell(6).toString());// 调出组织
                    budgetadjust.setExportdepartment(row.getCell(7).toString());// 调出部门
                    budgetadjust.setExportsubject(row.getCell(8).toString());// 调出科目
                    budgetadjust.setExportmonth(row.getCell(9).toString());// 调出月份
                    budgetadjust.setExportmoney(row.getCell(10).toString());// 调出金额

                    budgetadjust.setCostControl(row.getCell(11).toString());// 查询费控系统
                    budgetadjust.setImportorganization(row.getCell(12).toString());// 调入组织
                    budgetadjust.setImportdepartment(row.getCell(13).toString());// 调入部门
                    budgetadjust.setImportsubject(row.getCell(14).toString());// 调入科目
                    budgetadjust.setImportmonth(row.getCell(15).toString());// 调入月份
                    budgetadjust.setImportmoney(row.getCell(16).toString());// 调入金额
                    budgetadjust.setAdjustreason(row.getCell(17).toString());// 调整原因
                    list.add(budgetadjust);
                }
            }
            budgetAdjustService.saveOABudget(list);
        } catch (IOException e) {
            result.setSuccess(false);
            result.setMsg(e.getMessage());
        }
        result.setSuccess(true);
        result.setMsg("保存成功");  // 可以传文件名给页面 String fileName = file.getOriginalFilename(); //获取文件名
        result.setObj(list);
        return result;
    }

注意：

1.要想让标签 能够上传多个文件，只需要在里添加 multiple或 multiple="multiple"属性。

2. Execl 导出锁定列和隐藏单元的值

1.Execl列的锁定
HSSFCellStyle style = workbook.createCellStyle();
style.setLocked(true);//设置列的锁定状态为锁定

2.隐藏单元格的值
hssfRow.createCell(9).setCellValue("12月"); // 调出月
hssfRow.createCell(20).setCellValue("A1"); // 调出期间A1
sheet.setColumnHidden((short)20, true); //隐藏第单元格20的值A1   

3.设置表头字体样式背景颜色

private void setTitle(HSSFWorkbook workbook, HSSFSheet sheet) {
        HSSFRow row = sheet.createRow(0);
        // 设置列宽，setColumnWidth的第二个参数要乘以256，这个参数的单位是1/256个字符宽度
        sheet.setColumnWidth(8, 60 * 256);
        // 设置为居中加粗
        HSSFCellStyle style = workbook.createCellStyle();
        HSSFCellStyle style2 = workbook.createCellStyle();
        style.setLocked(true);//设置列的锁定状态
        style2.setLocked(true);
        HSSFFont font = workbook.createFont();
        HSSFFont font2 = workbook.createFont();
        font.setBold(true);//设置字体锁定状态
        style.setFont(font);
        style.setAlignment(HorizontalAlignment.CENTER);//水平居中
        style.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中
        // 导出的Excel头部
        String[] headers = { "调整类型", "申请日期", "OA流程编号", "申请组织", "申请部门", "是否涉及人力成本", "调出组织", "调出部门", "调出科目", "调出月份",
                "调出金额", "查询费控系统", "调入组织", "调入部门", "调入科目", "调入月份", "调入金额", "调整原因" };
        // 设置表格默认列宽度为15个字节
        sheet.setDefaultColumnWidth((short) 16);
        for (short i = 0; i < headers.length; i++) {
            HSSFCell cell = row.createCell(i);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
            if(i==10 || i>11) {
                font2.setBold(true);
                font2.setColor(HSSFColor.RED.index);  //颜色
                style2.setFont(font2);
                style2.setAlignment(HorizontalAlignment.CENTER);//水平居中
                style2.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中
                style2.setFillPattern(FillPatternType.SOLID_FOREGROUND);
                style2.setFillForegroundColor(IndexedColors.YELLOW.index);
                row.getCell(i).setCellStyle(style2);
            }else {
                cell.setCellStyle(style);
            }
        }
    }

效果图:

 

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相关链接:https://blog.csdn.net/daihuimaozideren/article/details/78777656

　　　　https://www.cnblogs.com/zhuwenxia/p/9443742.html

文件上传链接: https://blog.csdn.net/chenxueshanBlog/article/details/78894838

POI 3.17版本生成excel的一些样式设置: https://blog.csdn.net/m0_37353769/article/details/81872152

 

转载于:https://www.cnblogs.com/Steven5007/p/9756019.html