Servlet获取Session

package com.etecha.api.servletdemo;

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 GetHttpSessionServlet extends HttpServlet // 继承自 HttpServlet 类
{
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException
{
HttpSession se = request.getSession(); // Servlet 中获取 Session 对象
System.out.println("Session ID：" + se.getId()); // 获取 Session 的 ID
se.setAttribute("username", "雨尘"); // 给取的的 session 对象设置属性，属性以键值对的形式出现
System.out.println("username 属性的值为：" + se.getAttribute("username")); // 取得 session 中的属性时只传属性名即可
}

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException
{
this.doGet(request, response);
}
}





<servlet>
<servlet-name>getSessionServlet</servlet-name>
<servlet-class>com.etecha.api.servletdemo.GetHttpSessionServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>getSessionServlet</servlet-name>
<url-pattern>/ghss</url-pattern>
</servlet-mapping>