Servlet--获取Session对象

       package servlet08;
       import java.io.IOException;
       import java.io.PrintWriter;
       import javax.servlet.ServletException;
       import javax.servlet.http.HttpServlet;
       import javax.servlet.http.HttpServletRequest;
       import javax.servlet.http.HttpServletResponse;
       import javax.servlet.http.HttpSession;
       public class SessionServlet extends HttpServlet {
      	public void doGet(HttpServletRequest request, HttpServletResponse response)
      			throws ServletException, IOException {
       		response.setContentType("text/html;charset=UTF-8");
      		PrintWriter out = response.getWriter();
      		// 获取session对象
      		HttpSession  session = request.getSession();
       		System.out.println("-----session内存地址："+session+"<br/>");
       		System.out.println("-----sessionID为："+session.getId());
       	}
       }
   
  

       <?xml version="1.0" encoding="UTF-8"?>
       <web-app version="3.0"
          xmlns="http://java.sun.com/xml/ns/javaee"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
        <servlet>
          <description>This is the description of my J2EE component</description>
          <display-name>This is the display name of my J2EE component</display-name>
          <servlet-name>SessionServlet</servlet-name>
          <servlet-class>servlet08.SessionServlet</servlet-class>
        </servlet>
        <servlet-mapping>
          <servlet-name>SessionServlet</servlet-name>
          <url-pattern>/sessionservlet</url-pattern>
        </servlet-mapping>
       </web-app>