How do I inject dao into a servlet?

Init method for 1.servlet

 Public void throws Servletexception {
Super.init (config);        Springbeanautowiringsupport.processinjectionbasedonservletcontext (this,
Config.getservletcontext ());
}

2. Add private fields to the servlet and use @autowired to automatically inject

@Autowired Private DAO DAO;

3. Note, Super.init (config), if not added, then the ServletContext object in the servlet will throw a null pointer exception, because we rewrite the init (servletconfig), and the parent class init ( ServletConfig) has a reference to handle getting the ServletContext object.

So be careful, add super.init (config);

How do I inject dao into a servlet?