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

<dependency>

    <groupId>org.apache.poi</groupId>

    <artifactId>poi</artifactId>

    <version>3.17</version>

</dependency>

<dependency>

    <groupId>org.apache.poi</groupId>

    <artifactId>poi-ooxml</artifactId>

    <version>3.17</version>

</dependency>

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<Map<String, Object>> 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

<div class="row">

    <div class="col-md-12">

        <section class="panel">

            <header class="panel-heading">

                OA预算调整模板导入

            </header>

                <div class="modal-body">

                    <div class="row">

                        <div class="col-lg-12">

                            <form id="defaultForm" method="" class="form-horizontal recoveryNodeForm" action="">

                                <div class="col-lg-12">

                                    <div class="form-group">

                                        <label class="col-lg-3 control-label">导入文件</label>

                                        <div class="col-lg-6">

                                            <input type="file" class="form-control" style="height:36px;" name="uploadFile" id="uploadFile"/>

                                        </div>

                                        <button type="button" class="btn btn-primary" id="uploadExcel">上传</button>

                                    </div>

                                </div>

                                <input type="hidden" name="pkId" value="" />

                            </form>

                        </div>

                    </div>

                    <div>

                        <span><b>导入结果反馈</b></span>

                        <ul id="exportResult">

                        </ul>

                    </div>

                </div>

        </section>

    </div>

</div>

<!-- 工具JS由开发人员编写 -->

<script th:inline="javascript">

    /*<![CDATA[*/

$(function(){

    $(".recoveryNodeForm").bootstrapValidator({

        message: 'This value is not valid',

        live: 'submitted',

        fields: {/*验证*/

            uploadFile: {

                message: '导入文件无效',

                validators: {

                    notEmpty: {/*非空提示*/

                        message: '导入文件不能为空'

                    },

                    regexp: {

                        regexp: /\.xl(s[xmb]|t[xm]|am|s)$/,

                        //regexp: /.xls$/,

                       // extension: 'zip,rar,doc,docx,pdf',

                        message: '导入文件类型必须是excel'

                    }

                   /* uploadFile: {

                          extension: 'zip,rar,doc,docx,pdf',

                          //  type:'zip,rar,doc,docx,pdf',

                            maxSize: 1024*100,

                            minSize: 1024,

                            message: '仅支持大小在1M~5M之间,类型是zip,rar,doc,docx,pdf文件!'

                    } */

                }

            }

        }

    })

});

    $("#uploadExcel").on("click","",function () {

        $(".recoveryNodeForm").data("bootstrapValidator").validate();

        var flag = $(".recoveryNodeForm").data("bootstrapValidator").isValid();

        alert(flag+"===========flag===========");

        if(!flag){

            //未通过验证

            return false;

        }

        var fileObj = document.getElementById("uploadFile").files[0];

        var formFile = new FormData();

        formFile.append("file", fileObj);

        var data = formFile;

        $.ajax({

            url: "budgetOaController/upload",

            data: data,

            type: "Post",

            dataType: "json",

            cache: false,//上传文件无需缓存

            processData: false,//用于对data参数进行序列化处理 这里必须false

            contentType: false, //必须

            success: function (result) {

                console.log(JSON.stringify(result))

                var htmlstr = '';

                if(result.ajaxResultJson.success==false){

                    htmlstr = '<li>上传失败</li>';

                } else {

                    htmlstr = '<li>上传成功</li>';

                }

                $('#exportResult').html(htmlstr);

            },

            error: function(XMLHttpRequest, textStatus, errorThrown){

                layer.msg("系统错误",{icon: 2});

            }

        });

    });

    /*]]>*/

</script>

    // 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<Budgetadjust> list = new ArrayList<>();
　　　　 String fileName = file.getOriginalFilename(); //获取文件名

        try {
　　　　　　//解决You need to call a different part of POI to process this data (eg XSSF instead of HSSF)问题
　　　　　　// Workbook workbook=WorkbookFactory.create(file.getInputStream());

            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<input type="file">标签能够上传多个文件，只需要在<input type="file">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

　　　　https://blog.csdn.net/phil_jing/article/details/78307819

　　　　获取单元格类型getCellType

　　　　POI:https://blog.csdn.net/huasxiaopeng/article/details/42641809
　　　　https://blog.csdn.net/jiankang66/article/details/89040742

注意POI4.0.0版本区别