How to use SessionFilter in spring mvc 4.1

[subuhi nigar]

Hi ,

I am migrating an already build application from spring MVC 2.5 to Spring MVC 4.1 .
Facing problems during the process.

1) when i configure SessionFilter in web.xml the formatting of the JSP pages goes off . It totally ignores style.css under /css/ folder .

2) Filter always redirects to Login.jsp page printing in SessionFilter as ( session == null = true ).

Beow is the Filter's doFilter ()

  @Override
    public void doFilter(ServletRequest req, ServletResponse res,
            FilterChain chain) throws IOException, ServletException {
 
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;
        String url = request.getServletPath();
        boolean allowedRequest = false;
         
        if(urlList.contains(url)) {
            allowedRequest = true;
        }
             System.out.println("allowedRequest"+allowedRequest);
             System.out.println("urlList"+urlList);
             System.out.println("url"+url);
             
        if (!allowedRequest) {
            HttpSession session = request.getSession(false);
            
            if (null == session ) {
                response.sendRedirect("index.jsp");
            	
                System.out.println("session is null"+ (session==null));
                return ;
            }            
         
        }
         
        chain.doFilter(req, res);
    }

Here is web.xml

    <filter>
		<filter-name>blueSessionFilter</filter-name>
		<filter-class>com.BlueClouds.web.filter.BlueSessionFilter</filter-class>
		<init-param>
        <param-name>avoid-urls</param-name>
        <param-value>/index.jsp,/logon.htm,/register.htm</param-value>
    </init-param>
	</filter>
	<filter-mapping>
		<filter-name>blueSessionFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	<session-config>
        <session-timeout>
            5
        </session-timeout>
    </session-config>

This is very weird because same Filter with same configuration works fine in springMVC 2.5 app.

Also in login.jsp <%page session=false%> is not set .. So there is no point that session is not getting created in it.

Below is the LoginController method

 @RequestMapping( "logon")   
    public String renderForm(@ModelAttribute("employee") Logon employeeVO)
	{
    	return "logon";
	}
    
    

    @RequestMapping(value="Welcome", method = RequestMethod.POST) 
    public ModelAndView submitForm(@ModelAttribute("employee") Logon employeeVO,
                            BindingResult result, HttpServletRequest req) {

// do something 
// sest session attribute 
}


    {

Please help ... What i think is when first time logon page arrives it shows login.jsp page .. but when user submits it , form submits action="Welcome" that checks by filter
here it sees session == null
i am not getting why session is null when user clieck on submit button .

I am sorry for poorly writing my problem .
if more clarification is required , please let me know .

Thanks in advance.

Any help is much appreciated.

[subuhi nigar]

Hi ,

My problem seems to be resolved as soon as i set @scope("session") on LoginController .

Spring 4.1 behaves differently ! in spring 2.5 i hadn't set scope=session in <bean ...configuration in app-servlet.xml . There too LoginController is default singleton scope . Here too it is singleton .But if i remove @scope("session") and modify

 @RequestMapping( "logon")   
    public String renderForm(@ModelAttribute("employee") Logon employeeVO, HttpServletRequest req)
	{
    	System.out.println(" login controller session"+req.getSession(false));
    	return "logon";
	}

It prints session null .

Anyway , I need to understand spring mvc 4.1 flow . it seems to be different than 2.5 a lot .