servlet

servlet session

监听器

	package com.netease.server.example.web.controller;

	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;
	
	public class ConcurrentServlet extends HttpServlet {
	
		String name;
	
		/**
		 * 
		 */
		private static final long serialVersionUID = -6948878379930865229L;
	
		@Override
		public void init() throws ServletException {
			super.init();
		}
	
		@Override
		protected void doGet(HttpServletRequest req, HttpServletResponse resp)
				throws ServletException, IOException {
			synchronized (this) {
				name = req.getParameter("username");
				PrintWriter out = resp.getWriter();
				try {
					Thread.sleep(5000);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
				out.println("username: " + name);
			}
		}
	
		@Override
		public void destroy() {
			super.destroy();
		}
	}