保存session

HttpSession session=request.getSession();session.setAttribute("logonUser",logonuser );//session.setMaxInactiveInterval(15);String sessionid=session.getId();session.setAttribute("sessionid", sessionid);ServletContext ContextA =request.getSession().getServletContext(); Map<String,HttpSession> sessions = (Map<String, HttpSession>) ContextA.getAttribute("sessions");if(sessions ==null){sessions = new HashMap<>();}sessions.put(session.getId(), session);ContextA.setAttribute("sessions",sessions);setLogonlog(username,request, 1);success("登录成功");

取值

 String sessionid = request.getParameter("sessionid");try {HttpSession session = request.getSession();ServletContext ContextB = session.getServletContext();ServletContext ContextA = ContextB.getContext("/WebappA");// 这里面传递的是 WebappA登录应用的虚拟路径Map<String, HttpSession> sessions = (Map<String, HttpSession>) ContextA.getAttribute("sessions");HttpSession session2 = sessions.get(request.getParameter("sessionid"));HashMap<String, Object> logonuser = (HashMap<String, Object>) session2.getAttribute("logonUser");System.err.println(logonuser.size());for (String key : logonuser.keySet()) {System.out.println("Key2: " + key + " Value: " + logonuser.get(key));}session.setAttribute("logonUser", logonuser);session.setAttribute("sessionid", sessionid);// 登录账号区分大小写User user = userMapper.getByLoginAccountIgnoreCase((String) logonuser.get("userid"));user.apply(user);SessionManager.create(request).userLogon(user);} catch (Exception e) {log.error("平台跳转错误。。。。");log.error(e.getMessage());}return "redirect:/index.html";

参考

WebappA:HttpSession session = request.getSession();
session.setAttribute("userId", "test");
ServletContext ContextA =session .getServletContext();
ContextA.setAttribute("session", session );WebappB:HttpSession sessionB = request.getSession();  
ServletContext ContextB = sessionB.getServletContext();  
ServletContext ContextA= ContextB.getContext("/WebappA");// 这里面传递的是 WebappA的虚拟路径
HttpSession sessionA =(HttpSession)ContextA.getAttribute("session");
System.out.println("userId: "+sessionA.getAttribute("userId"));`

server.xml

        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"prefix="localhost_access_log" suffix=".txt"pattern="%h %l %u %t &quot;%r&quot; %s %b" /><Context crossContext="true" docBase="Plat" path="/Plat" reloadable="true" sessionCookiePath="/" />			<Context crossContext="true" docBase="SYS" path="/SYSCMS" reloadable="true" sessionCookiePath="/" />		   <Context crossContext="true" docBase="sydsue" path="/sydsunew" reloadable="true"  sessionCookiePath="/" />		   </Host>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"version="3.1"><distributable/>