您可以用一种更加优雅的方式来实现它，而无需在页面中声明outputPanel:

You can do it in a more elegant way, without the need of the outputPanel declared in the page:

1. JavaScript函数:

1. Javascript function:

function print(component){
    var out = document.createElement('div');
    out.appendChild(PF(component).exportAsImage()); 
    var innerHTML =  out.innerHTML;
    var openWindow = window.open('', 'Report', '');
    openWindow.document.write(innerHTML);
    openWindow.document.close();
    openWindow.focus();
    openWindow.print();
    openWindow.close();
}

<p:chart widgetVar="chart2" type="bar" model="#{chartsBean.barModel2}" />

<p:commandLink  id="lnk" onclick="print('chart2')"/>