JS页面获取session（通过ajax）

JS页面获取session（通过ajax）

JS文件：

<script type="text/javascript">
    function getUser(){
    	 alert(window.location.host);
    	 $.ajax({
//     			url:"http://localhost:8080/SecondDemo/user/getSession",
                url:"http://"+window.location.host+"/SecondDemo/user/getSession",
    			type:"GET",
    			dataType:"text",
    			success:function(data){
    				if(data=="new")
    					window.location.href="pages/login.html";
    				else
    				{
    					alert(data);
    					window.location.href="pages/user.html";
    				}    					
    			},
    			error : function(e) {
    	            alert("出错");
    	            alert(e.responseText);
    	        },
    		})
    }
</script>

后台的java controller：

@RequestMapping(value ="/getSession",method = RequestMethod.GET)
	public void getSession(HttpServletRequest request,HttpServletResponse response,HttpSession session) throws IOException
	{
		if(session.isNew())
		{
			response.getWriter().write("new");
			System.out.println("出错");
		}			
		else
		{		
			String phone_id=(String) session.getAttribute("phone_id");
			System.out.println(phone_id);
			response.getWriter().write(phone_id);
		}
	}