scope.java

张新曼 精通JSP Web 开发技术与典型应用 随书光盘源码

package ch08;

import java.io.IOException;

import javax.servlet.*;
import javax.servlet.http.*;

public class Scope extends HttpServlet {	
	
	public void doGet(HttpServletRequest request,
			HttpServletResponse response)throws ServletException, IOException {
			
			//属性1的作用域：requestScope	
			request.setAttribute("attr1", "华  山");
			
			//属性2的作用域：sessionScope
			HttpSession session = request.getSession();
			session.setAttribute("attr2", "翠华山");
			
			//属性3的作用域：sessionScope
			session.setAttribute("attr3", "太白山");
			
            //属性4的作用域：sessionScope
			session.setAttribute("attr4", "宝塔山");
			
			//属性5的作用域：applicationScope
			ServletContext application = getServletContext();
			application.setAttribute("attr5",new java.util.Date());			
												
			RequestDispatcher dispatcher =request.getRequestDispatcher("Scope.jsp");
			dispatcher.forward(request, response);
	}
}