How do I get Spring AplicationContext from a servlet?
Category: javax.servlet, viewed: 1889 time(s).
I've created a servlet based web application and I want to used Spring beans in it. So how do I do this in my servlet. Well it simple enough to do this. First of all of course I have to obtain the Spring's WebApplicationContext, from where I can grab the required bean by my servlet.
Let's see some lines of code on how to do it, here we go:
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ServletContext context = getServletContext(); WebApplicationContext applicationContext = WebApplicationContextUtils .getWebApplicationContext(context); Long userId = Long.valueOf(request.getParameter("user_id")); UserDao dao = (UserDao) applicationContext.getBean("userDao"); User user = dao.getUser(userId); response.setContentType("text/html"); PrintWriter pw = response.getWriter(); pw.print("User Details: " + user.toString()); pw.flush(); } |
Inside the Java Servlet doGet() method above I get the ServletContext, next the WebApplicationContextUtils help me to get Spring WebApplicationContext. With this object in my hand I can get my UserDao implementation and do a query from database.
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