基于注解的SpringMVC自定义DispatcherServlet配置

通过重载AbstractAnnotationConfigDispatcherServletInitializer实现类的customizeRegistration()方法来自定义DispatcherServlet配置

在AbstractAnnotationConfigDispatcherServletInitializer将DispatcherServlet注册到Servlet容器之后，就会调用customizeRegistration()方法，并将Servlet注册后得到的ServletRegistration.Dynamic传递进来，通过重载customizeRegistration()方法，我们可以对DispatcherServlet进行额外的配置。

 1 public class SpringWebAppInit extends AbstractAnnotationConfigDispatcherServletInitializer {
 2     //Spring容器
 3     @Override
 4     protected Class<?>[] getRootConfigClasses() {
 5         return new Class[]{RootConfig.class};
 6     }
 7 
 8     //SpringMVC容器
 9     @Override
10     protected Class<?>[] getServletConfigClasses() {
11         return new Class[]{WebConfig.class};
12     }
13 
14     //DispatcherServlet映射关系
15     @Override
16     protected String[] getServletMappings() {
17         return new String[]{"/"};
18     }
19 
20 
21     @Override
22     protected void customizeRegistration(ServletRegistration.Dynamic registration) {
23         super.customizeRegistration(registration);
24         registration.setMultipartConfig(new MultipartConfigElement("/tmp/coreqi/uploads"));//配置对multipart的支持
25         registration.setLoadOnStartup(1);//设置load-on-startup优先级
26     }
27 }