tagutils.java

来自「自已个人写的一款比较好的分页java+javabean+struts标签完成的自」· Java 代码 · 共 27 行

package cn.com.thinkbank.tags;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.jsp.PageContext;

public class TagUtils {
	public static Object lookup(String name, PageContext pageContext) {
		HttpServletRequest request = (HttpServletRequest) pageContext
				.getRequest();
		HttpSession session = request.getSession();
		ServletContext servletContext = pageContext.getServletContext();
		if (pageContext.getAttribute(name) != null)
			return pageContext.getAttribute(name);
		if (request.getAttribute(name) != null)
			return request.getAttribute(name);
		if (session.getAttribute(name) != null)
			return session.getAttribute(name);
		if (servletContext.getAttribute(name) != null)
			return servletContext.getAttribute(name);
		throw new RuntimeException("不能在任何范围内找到 Bean " + name);

	}
}