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