JSF和Spring共用的工具类

import javax.faces.FactoryFinder;
import javax.faces.application.Application;
import javax.faces.application.ApplicationFactory;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import javax.servlet.ServletContext;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

public final class SpringFacesUtil {
	
	public SpringFacesUtil() {
	}

	/**
	 * 从Spring中查找bean.
	 * @param beanName String
	 * @return Object
	 */
	public static Object findSpringBeanByName(String beanName) {
		ServletContext context = (ServletContext) FacesContext
				.getCurrentInstance().getExternalContext().getContext();
		ApplicationContext appctx = WebApplicationContextUtils
				.getRequiredWebApplicationContext(context);
		return appctx.getBean(beanName);
	}

	/**
	 * 由spring的xml配置文件位置和bean的名字取得bean
	 * @param xmlPath spring配置文件位置
	 * @param beanName 要取得bean的名字
	 * @return
	 */
	public static Object findSpringBeanByPath(String xmlPath,String beanName){
		ApplicationContext ctx =new FileSystemXmlApplicationContext(xmlPath);
		return ctx.getBean(beanName);
	}
	/**
	 * 从JSF中查找bean.
	 * @param beanname String
	 * @return Object
	 */
	@SuppressWarnings("deprecation")
	public static Object lookupJsfBean(String beanname) {
		Object obj = getValueBinding(getJsfEl(beanname)).getValue(
				FacesContext.getCurrentInstance());
		return obj;
	}

	@SuppressWarnings("deprecation")
	private static ValueBinding getValueBinding(String el) {
		return getApplication().createValueBinding(el);
	}

	private static Application getApplication() {
		ApplicationFactory appFactory = (ApplicationFactory) FactoryFinder
				.getFactory(FactoryFinder.APPLICATION_FACTORY);
		return appFactory.getApplication();
	}

	private static String getJsfEl(String value) {
		return "#{" + value + "}";
	}
}