Java 数据导出器在prime faces中，当它生成PDF时，会显示标记而不是tahn数据

这是我的问题，我有下面的代码，让我生成数据表的PDF，而不是它生成的PDF输出如下：

"#{k.semester.semesterTerm}" "#{k.doubleValue}"
"#{k.semester.semesterTerm}" "#{k.doubleValue}"
"#{k.semester.semesterTerm}" "#{k.doubleValue}"
"#{k.semester.semesterTerm}" "#{k.doubleValue}"
"#{k.semester.semesterTerm}" "#{k.doubleValue}"
"#{k.semester.semesterTerm}" "#{k.doubleValue}"

                <p:dataTable id="surveyassess" value="#{studentoutcome.targetSurveyAssessment}" var="k"
                             selection="#{studentoutcome.selectedRow}" rowKey="#{k.id}" selectionMode="single" paginator="true" rows="10">

                    <p:ajax event="rowSelect" listener="#{studentoutcome.studentOutcomesSelect}"/>  

                    <p:column headerText="Semester">
                        <f:facet name="header">
                        </f:facet>
                        "#{k.semester.semesterTerm}"

                    </p:column>


                    <p:column headerText="Attainment Target">
                        <f:facet name="header">
                        </f:facet>
                        "#{k.doubleValue}"

                    </p:column>


                </p:dataTable>

                <p:panel header="Export Page Data">
                    <h:commandLink>
                        <p:graphicImage value="/icons/pdf.png" />
                        <p:dataExporter type="pdf" target="surveyassess" fileName="mypdf" pageOnly="true"/>
                    </h:commandLink>
                </p:panel>
            </h:form>
        </div>

我的代码：

                <p:dataTable id="surveyassess" value="#{studentoutcome.targetSurveyAssessment}" var="k"
                             selection="#{studentoutcome.selectedRow}" rowKey="#{k.id}" selectionMode="single" paginator="true" rows="10">

                    <p:ajax event="rowSelect" listener="#{studentoutcome.studentOutcomesSelect}"/>  

                    <p:column headerText="Semester">
                        <f:facet name="header">
                        </f:facet>
                        "#{k.semester.semesterTerm}"

                    </p:column>


                    <p:column headerText="Attainment Target">
                        <f:facet name="header">
                        </f:facet>
                        "#{k.doubleValue}"

                    </p:column>


                </p:dataTable>

                <p:panel header="Export Page Data">
                    <h:commandLink>
                        <p:graphicImage value="/icons/pdf.png" />
                        <p:dataExporter type="pdf" target="surveyassess" fileName="mypdf" pageOnly="true"/>
                    </h:commandLink>
                </p:panel>
            </h:form>
        </div>

每个学期的目标调查评估达成水平：

                <p:dataTable id="surveyassess" value="#{studentoutcome.targetSurveyAssessment}" var="k"
                             selection="#{studentoutcome.selectedRow}" rowKey="#{k.id}" selectionMode="single" paginator="true" rows="10">

                    <p:ajax event="rowSelect" listener="#{studentoutcome.studentOutcomesSelect}"/>  

                    <p:column headerText="Semester">
                        <f:facet name="header">
                        </f:facet>
                        "#{k.semester.semesterTerm}"

                    </p:column>


                    <p:column headerText="Attainment Target">
                        <f:facet name="header">
                        </f:facet>
                        "#{k.doubleValue}"

                    </p:column>


                </p:dataTable>

                <p:panel header="Export Page Data">
                    <h:commandLink>
                        <p:graphicImage value="/icons/pdf.png" />
                        <p:dataExporter type="pdf" target="surveyassess" fileName="mypdf" pageOnly="true"/>
                    </h:commandLink>
                </p:panel>
            </h:form>
        </div>

“{k.学期.学期}”
“#{k.doubleValue}”

尝试使用h:outputText标记在列中显示数据，如：

                <p:dataTable id="surveyassess" value="#{studentoutcome.targetSurveyAssessment}" var="k"
                             selection="#{studentoutcome.selectedRow}" rowKey="#{k.id}" selectionMode="single" paginator="true" rows="10">

                    <p:ajax event="rowSelect" listener="#{studentoutcome.studentOutcomesSelect}"/>  

                    <p:column headerText="Semester">
                        <f:facet name="header">
                        </f:facet>
                        "#{k.semester.semesterTerm}"

                    </p:column>


                    <p:column headerText="Attainment Target">
                        <f:facet name="header">
                        </f:facet>
                        "#{k.doubleValue}"

                    </p:column>


                </p:dataTable>

                <p:panel header="Export Page Data">
                    <h:commandLink>
                        <p:graphicImage value="/icons/pdf.png" />
                        <p:dataExporter type="pdf" target="surveyassess" fileName="mypdf" pageOnly="true"/>
                    </h:commandLink>
                </p:panel>
            </h:form>
        </div>

<p:column headerText="Attainment Target">
                    <f:facet name="header">
                    </f:facet>
                    <h:outputText value="#{k.doubleValue}"/>
</p:column>