我有一个无法从中获取 FaceletContext 的 JSF 2.0 项目。
这是我的 web.xml 中的设置:
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<context-param>
<param-name>facelets.DEVELOPMENT</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>server</param-value>
</context-param>
<context-param>
<param-name>javax.faces.PARTIAL_STATE_SAVING</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>javax.faces.FULL_STATE_SAVING_VIEW_IDS</param-name>
<param-value>/index.xhtml</param-value>
</context-param>
<context-param>
<param-name>javax.faces.DEFAULT_SUFFIX</param-name>
<param-value>.xhtml</param-value>
</context-param>
<context-param>
<param-name>javax.faces.application.CONFIG_FILES</param-name>
<param-value>/WEB-INF/faces-config.xml</param-value>
</context-param>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
我可以获取 FacesContext,但不能获取 FaceletContext。以下代码行是问题所在:
FacesContext fctx = FacesContext.getCurrentInstance(); //works
//FaceletContext f2ctx = (FaceletContext) fctx.getAttributes().get(FaceletContext.FACELET_CONTEXT_KEY);
FaceletContext f2ctx = (FaceletContext) fctx.getELContext().getContext(FaceletContext.class);
有人可以帮忙吗?
更新:
以上是我总体目标的一个片段:按需加载包含对话框的 facelet 文件,然后将其添加到父级以显示。下面的代码不完整,但应该解释我的意思。请注意,该应用程序使用 Primefaces 库,因此使用 RequestContext 对象。
public void launch() {
form.getChildren().clear();
FacesContext fctx = FacesContext.getCurrentInstance();
for (Object o: fctx.getAttributes().keySet()) {
System.out.println(o.toString());
}
FaceletContext f2ctx = (FaceletContext) fctx.getAttributes().get(FaceletContext.FACELET_CONTEXT_KEY);
//FaceletContext f2ctx = (FaceletContext) fctx.getELContext().getContext(FaceletContext.class);
dialog = new Dialog();
try {
f2ctx.includeFacelet(dialog, "/WEB-INF/facelets/dialog/manager.xhtml");
form.getChildren().add(dialog);
} catch (IOException ex) {
log.debug(ex.toString());
}
RequestContext.getCurrentInstance().update("mainPageCenterForm");
}