import javax.faces.component.html.HtmlForm; //导入依赖的package包/类
private String findClientIdOfSurroundingFormClientId(final UIComponent component) {
    if (component instanceof HtmlForm) {
        return component.getClientId();
    }

    if (component.getParent() == null) {
        return null;
    }

    return findClientIdOfSurroundingFormClientId(component.getParent());
}
 

import javax.faces.component.html.HtmlForm; //导入依赖的package包/类
/**
 * Find enclosing form of the component.
 * 
 * @param comp the component to find the enclsing form of
 * 
 * @return the form component (null if form parent not found)
 */
public UIForm findEnclosingFormOf(UIComponent comp) {
	while (comp != null && !(comp instanceof HtmlForm)) {

	    comp = comp.getParent();

	}
	if(comp instanceof UIForm) {
		return (UIForm) comp;
	}
	return null;
	
}
 

import javax.faces.component.html.HtmlForm; //导入依赖的package包/类
private Renderer getDefaultFormRenderer(FacesContext context) {
	return context.getRenderKit().getRenderer(HtmlForm.COMPONENT_FAMILY, "javax.faces.Form");
}
 

import javax.faces.component.html.HtmlForm; //导入依赖的package包/类
public JsfFormRenderer(JsfFormModel model) {
	super(HtmlForm.COMPONENT_TYPE, model);
	component.setEnctype(model.getEntype());
}