如何从 JSF 中的托管 bean 返回 HTML？

Question

我的托管 bean 中有一种方法将 javascript 作为字符串返回。当从head 标记调用该方法时，它工作正常。但是当从body 调用它时，浏览器不会呈现 javascript，而是按原样编写它。可能是什么问题？

在我的 JSF 页面中，当我在 head 中执行 #{IndexBean.EastRegionGadgets} 时，它工作正常，但在 body 中却不行。它按原样输出 HTML。代码如下：

package BusinessFacade;

import java.util.ArrayList;
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.faces.component.html.HtmlOutputText;


enum REGION{
    NORTH,EAST,WEST;
}

class Gadget{
    private String gadgetCode = "";
    private REGION gadgetRegion = REGION.WEST;

    public Gadget(String gadgetCode, REGION gadgetRegion){
        this.gadgetCode = gadgetCode;
        this.gadgetRegion = gadgetRegion;
    }

    public String getGadgetCode() {
        return gadgetCode;
    }

    public void setGadgetCode(String gadgetCode) {
        this.gadgetCode = gadgetCode;
    }

    public REGION getGadgetRegion() {
        return gadgetRegion;
    }

    public void setGadgetRegion(REGION gadgetRegion) {
        this.gadgetRegion = gadgetRegion;
    }

}

@ManagedBean(name="IndexBean")
@RequestScoped
public class IndexBean {
    ArrayList<Gadget> _list;
    public IndexBean() {

    }

    @PostConstruct
    public void initialize(){
        _list = new ArrayList<Gadget>();
        Gadget objGadget = new Gadget("<script type='text/javascript' src='http://cdn.widgetserver.com/syndication/subscriber/InsertWidget.js'></script><script>if (WIDGETBOX) WIDGETBOX.renderWidget('78d12c15-dc87-42f2-a78a-3f62a91a119a');</script><noscript>Get the <a href='http://www.widgetbox.com/widget/crystal-clock'>Crystal Clock</a> widget and many other <a href='http://www.widgetbox.com/'>great free widgets</a> at <a href='http://www.widgetbox.com'>Widgetbox</a>! Not seeing a widget? (<a href='http://docs.widgetbox.com/using-widgets/installing-widgets/why-cant-i-see-my-widget/'>More info</a>)</noscript>",REGION.WEST);
        _list.add(objGadget);

        objGadget = new Gadget("<script type='text/javascript' src='http://cdn.widgetserver.com/syndication/subscriber/InsertWidget.js'></script><script>if (WIDGETBOX) WIDGETBOX.renderWidget('1ccc3dee-8266-4b84-8191-13a4bf584d0c');</script><noscript>Get the <a href='http://www.widgetbox.com/widget/custom-clock'>Shiny Clock</a> widget and many other <a href='http://www.widgetbox.com/'>great free widgets</a> at <a href='http://www.widgetbox.com'>Widgetbox</a>! Not seeing a widget? (<a href='http://docs.widgetbox.com/using-widgets/installing-widgets/why-cant-i-see-my-widget/'>More info</a>)</noscript>",REGION.EAST);
        _list.add(objGadget);



    }

    public String getWestRegionGadgets(){
        HtmlOutputText objHtmlOutputText = new HtmlOutputText();
        String strGadgets = "";
        for(Gadget objGadget:_list ){
            if(objGadget.getGadgetRegion() == REGION.WEST){
                strGadgets += objGadget.getGadgetCode();
            }
        }
        return strGadgets;

    }

    public String getEastRegionGadgets(){

        String strGadgets = "";
        for(Gadget objGadget:_list ){
            if(objGadget.getGadgetRegion() == REGION.EAST){
                strGadgets += objGadget.getGadgetCode();
            }
        }
        return strGadgets;

    }


}

Answer 1

在我的 JSF 页面中，当我在 head 中执行 #{IndexBean.EastRegionGadgets} 时，它工作正常，但在 body 中却不行。它按原样输出 HTML。

我想您在body 中使用<h:outputText> 来输出HTML。根据documentation，它默认转义 HTML。您需要将其escape 属性设置为false。

<h:outputText value="#{bean.html}" escape="false" />