利用freemarker导出Excel

1. 使用背景:公司项目中需要导出Excel,使用了freemarker模板。

2. 操作步骤:

(1)首先自己新建一个Excel表格,在里面写好自己的格式(最好同时写好一行假数据),

(2)然后另存为xml格式的文件

(3)使用nopad++或其他编辑器打开xml文件(最好代码格式化一下),可以看到样式和数据都已经生成好了,我们可以直接将这个xml文件作为我们的free marker模板(拿来即用)

   

 <?xml version="1.0" encoding="utf-8"?>
    <?mso-application progid="Excel.Sheet"?>
     
    <Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882">
      <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
        <Author>mcchu</Author>
        <LastAuthor>mcchu</LastAuthor>
        <Created>2017-11-21T02:10:46Z</Created>
        <LastSaved>2017-11-21T02:22:14Z</LastSaved>
      </DocumentProperties>
      <CustomDocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
        <KSOProductBuildVer dt:dt="string">2052-10.1.0.6930</KSOProductBuildVer>
      </CustomDocumentProperties>
      <ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">
        <WindowWidth>20385</WindowWidth>
        <WindowHeight>8370</WindowHeight>
        <ActiveSheet>1</ActiveSheet>
        <ProtectStructure>False</ProtectStructure>
        <ProtectWindows>False</ProtectWindows>
      </ExcelWorkbook>
      <Styles>
        <Style ss:ID="s46" ss:Name="强调文字颜色 6">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#70AD47" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s33" ss:Name="20% - 强调文字颜色 5">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#D9E1F2" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s32" ss:Name="适中">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#9C6500"/>
          <Interior ss:Color="#FFEB9C" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s14" ss:Name="60% - 强调文字颜色 2">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#F4B084" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s7" ss:Name="差">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#9C0006"/>
          <Interior ss:Color="#FFC7CE" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s8" ss:Name="千位分隔">
          <NumberFormat ss:Format="_ * #,##0.00_ ;_ * \-#,##0.00_ ;_ * "-"??_ ;_ @_ "/>
        </Style>
        <Style ss:ID="s42" ss:Name="40% - 强调文字颜色 4">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#FFE699" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s36" ss:Name="40% - 强调文字颜色 1">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#BDD7EE" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s20" ss:Name="标题 2">
          <Borders>
            <Border ss:Position="Bottom" ss:LineStyle="Continuous" ss:Weight="2" ss:Color="#5B9BD5"/>
          </Borders>
          <Font ss:FontName="宋体" x:CharSet="134" ss:Size="13" ss:Color="#44546A" ss:Bold="1"/>
        </Style>
        <Style ss:ID="s16" ss:Name="警告文本">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FF0000"/>
        </Style>
        <Style ss:ID="s1" ss:Name="货币[0]">
          <NumberFormat ss:Format="_ "¥"* #,##0_ ;_ "¥"* \-#,##0_ ;_ "¥"* "-"_ ;_ @_ "/>
        </Style>
        <Style ss:ID="s3" ss:Name="输入">
          <Borders>
            <Border ss:Position="Bottom" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#7F7F7F"/>
            <Border ss:Position="Left" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#7F7F7F"/>
            <Border ss:Position="Right" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#7F7F7F"/>
            <Border ss:Position="Top" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#7F7F7F"/>
          </Borders>
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#3F3F76"/>
          <Interior ss:Color="#FFCC99" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s6" ss:Name="40% - 强调文字颜色 3">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#DBDBDB" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s31" ss:Name="好">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#006100"/>
          <Interior ss:Color="#C6EFCE" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s25" ss:Name="计算">
          <Borders>
            <Border ss:Position="Bottom" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#7F7F7F"/>
            <Border ss:Position="Left" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#7F7F7F"/>
            <Border ss:Position="Right" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#7F7F7F"/>
            <Border ss:Position="Top" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#7F7F7F"/>
          </Borders>
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FA7D00" ss:Bold="1"/>
          <Interior ss:Color="#F2F2F2" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s19" ss:Name="标题 1">
          <Borders>
            <Border ss:Position="Bottom" ss:LineStyle="Continuous" ss:Weight="2" ss:Color="#5B9BD5"/>
          </Borders>
          <Font ss:FontName="宋体" x:CharSet="134" ss:Size="15" ss:Color="#44546A" ss:Bold="1"/>
        </Style>
        <Style ss:ID="s13" ss:Name="注释">
          <Borders>
            <Border ss:Position="Bottom" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#B2B2B2"/>
            <Border ss:Position="Left" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#B2B2B2"/>
            <Border ss:Position="Right" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#B2B2B2"/>
            <Border ss:Position="Top" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#B2B2B2"/>
          </Borders>
          <Interior ss:Color="#FFFFCC" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s9" ss:Name="60% - 强调文字颜色 3">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#C9C9C9" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s5" ss:Name="千位分隔[0]">
          <NumberFormat ss:Format="_ * #,##0_ ;_ * \-#,##0_ ;_ * "-"_ ;_ @_ "/>
        </Style>
        <Style ss:ID="s44" ss:Name="40% - 强调文字颜色 5">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#B4C6E7" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s35" ss:Name="20% - 强调文字颜色 1">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#DDEBF7" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s27" ss:Name="20% - 强调文字颜色 6">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#E2EFDA" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s17" ss:Name="标题">
          <Font ss:FontName="宋体" x:CharSet="134" ss:Size="18" ss:Color="#44546A" ss:Bold="1"/>
        </Style>
        <Style ss:ID="s15" ss:Name="标题 4">
          <Font ss:FontName="宋体" x:CharSet="134" ss:Size="11" ss:Color="#44546A" ss:Bold="1"/>
        </Style>
        <Style ss:ID="s10" ss:Name="超链接">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#0000FF" ss:Underline="Single"/>
        </Style>
        <Style ss:ID="s4" ss:Name="货币">
          <NumberFormat ss:Format="_ "¥"* #,##0.00_ ;_ "¥"* \-#,##0.00_ ;_ "¥"* "-"??_ ;_ @_ "/>
        </Style>
        <Style ss:ID="s45" ss:Name="60% - 强调文字颜色 5">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#8EA9DB" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s29" ss:Name="链接单元格">
          <Borders>
            <Border ss:Position="Bottom" ss:LineStyle="Double" ss:Weight="3" ss:Color="#FF8001"/>
          </Borders>
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FA7D00"/>
        </Style>
        <Style ss:ID="s23" ss:Name="60% - 强调文字颜色 4">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#FFD966" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s21" ss:Name="60% - 强调文字颜色 1">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#9BC2E6" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="Default" ss:Name="Normal">
          <Alignment/>
          <Borders/>
          <Font ss:FontName="宋体" x:CharSet="134" ss:Size="12"/>
          <Interior/>
          <NumberFormat/>
          <Protection/>
        </Style>
        <Style ss:ID="s2" ss:Name="20% - 强调文字颜色 3">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#EDEDED" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s47" ss:Name="40% - 强调文字颜色 6">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#C6E0B4" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s37" ss:Name="20% - 强调文字颜色 2">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#FCE4D6" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s34" ss:Name="强调文字颜色 1">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#5B9BD5" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s28" ss:Name="强调文字颜色 2">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#ED7D31" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s24" ss:Name="输出">
          <Borders>
            <Border ss:Position="Bottom" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#3F3F3F"/>
            <Border ss:Position="Left" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#3F3F3F"/>
            <Border ss:Position="Right" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#3F3F3F"/>
            <Border ss:Position="Top" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#3F3F3F"/>
          </Borders>
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#3F3F3F" ss:Bold="1"/>
          <Interior ss:Color="#F2F2F2" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s18" ss:Name="解释性文本">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#7F7F7F" ss:Italic="1"/>
        </Style>
        <Style ss:ID="s12" ss:Name="已访问的超链接">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#800080" ss:Underline="Single"/>
        </Style>
        <Style ss:ID="s11" ss:Name="百分比">
          <NumberFormat ss:Format="0%"/>
        </Style>
        <Style ss:ID="s48" ss:Name="60% - 强调文字颜色 6">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#A9D08E" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s40" ss:Name="强调文字颜色 4">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#FFC000" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s38" ss:Name="40% - 强调文字颜色 2">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#F8CBAD" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s26" ss:Name="检查单元格">
          <Borders>
            <Border ss:Position="Bottom" ss:LineStyle="Double" ss:Weight="3" ss:Color="#3F3F3F"/>
            <Border ss:Position="Left" ss:LineStyle="Double" ss:Weight="3" ss:Color="#3F3F3F"/>
            <Border ss:Position="Right" ss:LineStyle="Double" ss:Weight="3" ss:Color="#3F3F3F"/>
            <Border ss:Position="Top" ss:LineStyle="Double" ss:Weight="3" ss:Color="#3F3F3F"/>
          </Borders>
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF" ss:Bold="1"/>
          <Interior ss:Color="#A5A5A5" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s22" ss:Name="标题 3">
          <Borders>
            <Border ss:Position="Bottom" ss:LineStyle="Continuous" ss:Weight="2" ss:Color="#ACCCEA"/>
          </Borders>
          <Font ss:FontName="宋体" x:CharSet="134" ss:Size="11" ss:Color="#44546A" ss:Bold="1"/>
        </Style>
        <Style ss:ID="s43" ss:Name="强调文字颜色 5">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#4472C4" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s39" ss:Name="强调文字颜色 3">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#FFFFFF"/>
          <Interior ss:Color="#A5A5A5" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s30" ss:Name="汇总">
          <Borders>
            <Border ss:Position="Bottom" ss:LineStyle="Double" ss:Weight="3" ss:Color="#5B9BD5"/>
            <Border ss:Position="Top" ss:LineStyle="Continuous" ss:Weight="1" ss:Color="#5B9BD5"/>
          </Borders>
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000" ss:Bold="1"/>
        </Style>
        <Style ss:ID="s41" ss:Name="20% - 强调文字颜色 4">
          <Font ss:FontName="宋体" x:CharSet="0" ss:Size="11" ss:Color="#000000"/>
          <Interior ss:Color="#FFF2CC" ss:Pattern="Solid"/>
        </Style>
        <Style ss:ID="s49"/>
      </Styles>
      <Worksheet ss:Name="评审意见">
        <Table ss:ExpandedColumnCount="4" ss:ExpandedRowCount="2" x:FullColumns="1" x:FullRows="1" ss:DefaultColumnWidth="54" ss:DefaultRowHeight="14.25">
          <Column ss:Index="1" ss:StyleID="Default" ss:AutoFitWidth="0" ss:Width="69" ss:Span="2"/>
          <Column ss:Index="4" ss:StyleID="Default" ss:AutoFitWidth="0" ss:Width="109.5"/>
          <Row>
            <Cell>
              <Data ss:Type="String">评审单编号</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">评审人账号</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">评审人名字</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">评审意见</Data>
            </Cell>
          </Row>
          <Row>
            <Cell>
              <Data ss:Type="String">AB01</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">kacs</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">张三</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">建议重新进行评审</Data>
            </Cell>
          </Row>
        </Table>
        <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">
          <PageSetup>
            <Header x:Margin="0.511111111111111"/>
            <Footer x:Margin="0.511111111111111"/>
          </PageSetup>
          <TopRowVisible>0</TopRowVisible>
          <LeftColumnVisible>0</LeftColumnVisible>
          <PageBreakZoom>100</PageBreakZoom>
          <Panes>
            <Pane>
              <Number>3</Number>
              <ActiveRow>8</ActiveRow>
              <ActiveCol>2</ActiveCol>
              <RangeSelection>R9C3</RangeSelection>
            </Pane>
          </Panes>
          <ProtectObjects>False</ProtectObjects>
          <ProtectScenarios>False</ProtectScenarios>
        </WorksheetOptions>
      </Worksheet>
      <Worksheet ss:Name="决策意见">
        <Table ss:ExpandedColumnCount="4" ss:ExpandedRowCount="2" x:FullColumns="1" x:FullRows="1" ss:DefaultColumnWidth="54" ss:DefaultRowHeight="14.25">
          <Column ss:Index="1" ss:StyleID="Default" ss:AutoFitWidth="0" ss:Width="69" ss:Span="2"/>
          <Column ss:Index="4" ss:StyleID="Default" ss:AutoFitWidth="0" ss:Width="109.5"/>
          <Row>
            <Cell>
              <Data ss:Type="String">决策单编号</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">决策人账号</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">决策人姓名</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">决策意见</Data>
            </Cell>
          </Row>
          <Row>
            <Cell>
              <Data ss:Type="String">AB02</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">lda</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">李四</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">暂无意见,同意!</Data>
            </Cell>
          </Row>
        </Table>
        <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">
          <PageSetup>
            <Header x:Margin="0.511111111111111"/>
            <Footer x:Margin="0.511111111111111"/>
          </PageSetup>
          <Selected/>
          <TopRowVisible>0</TopRowVisible>
          <LeftColumnVisible>0</LeftColumnVisible>
          <PageBreakZoom>100</PageBreakZoom>
          <Panes>
            <Pane>
              <Number>3</Number>
              <ActiveRow>5</ActiveRow>
              <ActiveCol>4</ActiveCol>
              <RangeSelection>R6C5</RangeSelection>
            </Pane>
          </Panes>
          <ProtectObjects>False</ProtectObjects>
          <ProtectScenarios>False</ProtectScenarios>
        </WorksheetOptions>
      </Worksheet>
      <Worksheet ss:Name="Sheet3">
        <Table ss:ExpandedColumnCount="1" ss:ExpandedRowCount="1" x:FullColumns="1" x:FullRows="1" ss:DefaultColumnWidth="54" ss:DefaultRowHeight="14.25"/>
        <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">
          <PageSetup>
            <Header x:Margin="0.511111111111111"/>
            <Footer x:Margin="0.511111111111111"/>
          </PageSetup>
          <TopRowVisible>0</TopRowVisible>
          <LeftColumnVisible>0</LeftColumnVisible>
          <PageBreakZoom>100</PageBreakZoom>
          <ProtectObjects>False</ProtectObjects>
          <ProtectScenarios>False</ProtectScenarios>
        </WorksheetOptions>
      </Worksheet>
    </Workbook>

(4)注意替换上面的测试数据,就是刚刚定义的假数据,将他们改成freemarker语法规定的变量格式,因为我们要去后台接收数据,做好和实体属性的映射,以决策为例子,处理后如下,注意有些编辑器对此xml的解析会报错,不用管它:

   

 <!-- ExpandedRowCount这个属性是做行数显示控制,我们根据返回的List对象长度,再加上1行标题,最为他的总行数显示 -->
        <Table ss:ExpandedColumnCount="4" ss:ExpandedRowCount="${decisions?size+1}" x:FullColumns="1" x:FullRows="1" ss:DefaultColumnWidth="54" ss:DefaultRowHeight="14.25">
          <Column ss:Index="1" ss:StyleID="Default" ss:AutoFitWidth="0" ss:Width="69" ss:Span="2"/>
          <Column ss:Index="4" ss:StyleID="Default" ss:AutoFitWidth="0" ss:Width="109.5"/>
          <Row>
            <Cell>
              <Data ss:Type="String">决策单编号</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">决策人账号</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">决策人姓名</Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">决策意见</Data>
            </Cell>
          </Row>
          
          <#if decisions?exists && decisions??>  <!-- 这里是给decisions这个对象做判空 -->
          <#list decisions as item>  <!-- 这里是给decisions这个对象做遍历 -->
          <Row>
            <Cell>
              <Data ss:Type="String">  ${item.decisionCode!'这个单元格为空'}  </Data>  <!-- 这里是给decisions这个对象的decisionCode做判空处理,若为空,则显示“这个单元格为空” -->
            </Cell>
            <Cell>
              <Data ss:Type="String">  ${item.decisionAccount!''}  </Data> <!-- 这里是给decisions这个对象的decisionCode做判空处理,若为空,则不显示 -->
            </Cell>
            <Cell>
              <Data ss:Type="String">  ${item.decisionUsername!''}  </Data>
            </Cell>
            <Cell>
              <Data ss:Type="String">  ${item.decisionOpinion!''}  </Data>
            </Cell>
          </Row>
          </#list>
          </#if>
          
        </Table>

(5)此时,我们的freemarker简单模板就做好了,下面我们定义一个bean,注入freemarker

      

  <bean id="freeMarkerConfiguration" class="org.springframework.ui.freemarker.FreeMarkerConfigurationFactoryBean">
            <property name="templateLoaderPath" value="classpath:com/demo/resources/template" />
            <property name="defaultEncoding" value="utf-8" />
        </bean>

将我们刚刚创建好的模板放在项目的com/demo/resources/template目录下(就是bean中配置的路径)
(6)注入freemarker bean并实现导出功能:
       

 @Autowired
 private Configuration freemarkerConfiguration; // 注入bean,这里是属性注入,推荐构造注入
     
        /**
         * 下载Excel
         */
 @RequestMapping("downloadExcel")
 public void downloadExcel( HttpServletRequest request,HttpServletResponse response ){
            try {
                // 封装导出数据
                List<RequisitionReviewExportVo> exportReviewList = requisitionService.exportReviewList(requisitionCondition);
                List<RequisitionDecisionExportVo> exportDecisionList = requisitionService.exportDecisionList(requisitionCondition);
                Map data=new HashMap();
                data.put("reviews",exportReviewList); //第一个worksheet的数据对象
                data.put("decisions",exportDecisionList); //第二个worksheet的数据对象
                // 导出
                request.setCharacterEncoding("UTF-8");
                response.setContentType("application/x-download;");
                response.setHeader("Content-disposition", "attachment; filename="
                        + new String("导出的文件名字.xls".getBytes("gb2312"), "ISO8859-1"));
                freemarkerConfiguration.getTemplate("export-format-requisition.xml").process(data,response.getWriter());
            }catch (Exception e){
                log.error("文件下载异常", e);
                e.printStackTrace();
            }
        }

遇到的问题:

1. 使用xml作为freemarker模板时,一些含有特殊字符的变量会被xml转译,导致导出结果显示错误,此时可以使用apache common lang3包下的工具处理:

org.apache.commons.lang3.StringEscapeUtils.escapeXml( "<张三>!" )

2. 使用freemarker在模板中做日期格式处理时遇到问题,处理年月日时显示正常,但如果传值为null时,显示”1900/1/0“,改成了从后台使用SimpleDateFormat处理。

3. 日期处理中时分秒的单独显示未成功,参考使用了以下3中解析方式,都没有解析成功,可能是其他地方错了,改成了从后台使用SimpleDateFormat处理。

    ${reviews.date?string('hh:mm:ss')}
    ${reviews.date?string('HH:mm:ss')}
    ${reviews.date?time('hh:mm:ss')}

4. 给特定格式的日期做判空,为空时不显示,改成如下

${(reviews.createTime?string('yyyy-MM-dd'))!''}

原文:https://blog.csdn.net/baidu_30809315/article/details/78589388
 

猜你喜欢

转载自blog.csdn.net/shiboyuan0410/article/details/84540619
今日推荐