设置p:datatable中单元格的背景色

<p:dataTable>
    <p:column styleClass="myColumnStyle">
        <!-- 列内容 -->
    </p:column>
</p:dataTable>

.myColumnStyle {
    background-color: #f2f2f2;
}

<p:dataTable>
    <p:column>
        <p:cellEditor>
            <f:facet name="output">
                <h:outputText value="#{item.value}" styleClass="#{item.value > 0 ? 'positiveValue' : 'negativeValue'}" />
            </f:facet>
            <f:facet name="input">
                <p:inputText value="#{item.value}" />
            </f:facet>
        </p:cellEditor>
    </p:column>
</p:dataTable>

.positiveValue {
    background-color: #00ff00;
}

.negativeValue {
    background-color: #ff0000;
}