Spring MVC之FrameworkServlet源码分析

 1     /**
 2      * Overridden method of {@link HttpServletBean}, invoked after any bean properties
 3      * have been set. Creates this servlet‘s WebApplicationContext.
 4      */
 5     @Override
 6     protected final void initServletBean() throws ServletException {
 7         getServletContext().log("Initializing Spring FrameworkServlet ‘" + getServletName() + "‘");
 8         if (this.logger.isInfoEnabled()) {
 9             this.logger.info("FrameworkServlet ‘" + getServletName() + "‘: initialization started");
10         }
11         long startTime = System.currentTimeMillis();
12 
13         try {
14             this.webApplicationContext = initWebApplicationContext();
15             initFrameworkServlet();
16         }
17         catch (ServletException ex) {
18             this.logger.error("Context initialization failed", ex);
19             throw ex;
20         }
21         catch (RuntimeException ex) {
22             this.logger.error("Context initialization failed", ex);
23             throw ex;
24         }
25 
26         if (this.logger.isInfoEnabled()) {
27             long elapsedTime = System.currentTimeMillis() - startTime;
28             this.logger.info("FrameworkServlet ‘" + getServletName() + "‘: initialization completed in " +
29                     elapsedTime + " ms");
30         }
31     }