springMVC零配置，无web.xml,无spring配置

package com.mu.config; import javax.servlet.MultipartConfigElement; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletRegistration.Dynamic; import org.springframework.web.WebApplicationInitializer; import org.springframework.web.context.support.AnnotationConfigWebApplicationContext; import org.springframework.web.servlet.DispatcherServlet; public class WebApplicationStartup implements WebApplicationInitializer { private static final String SERVLET_NAME = "Spring-mvc"; private static final long MAX_FILE_UPLOAD_SIZE = 1024 * 1024 * 5; // 5 Mb private static final int FILE_SIZE_THRESHOLD = 1024 * 1024; // After 1Mb private static final long MAX_REQUEST_SIZE = -1L; // No request size limit /** * 服务器启动调用此方法，在这里可以做配置 作用与web.xml相同 */ @Override public void onStartup(ServletContext servletContext) throws ServletException { // 注册springMvc的servlet this.addServlet(servletContext); // 注册过滤器 // servletContext.addFilter(arg0, arg1) // 注册监听器 // servletContext.addListener(arg0); } /** * 注册Spring servlet * * @param servletContext */ private void addServlet(ServletContext servletContext ) { // 构建一个application context AnnotationConfigWebApplicationContext webContext = createWebContext(SpringConfig.class, ViewConfiguration.class); // 注册spring mvc 的 servlet Dynamic dynamic = servletContext.addServlet(SERVLET_NAME, new DispatcherServlet(webContext)); // 添加springMVC 允许访问的Controller后缀 dynamic.addMapping("*.html", "*.ajax", "*.css", "*.js", "*.gif", "*.jpg", "*.png","*.do"); // 全部通过请用 “/” // dynamic.addMapping("/"); dynamic.setLoadOnStartup(1); dynamic.setMultipartConfig(new MultipartConfigElement(null, MAX_FILE_UPLOAD_SIZE, MAX_REQUEST_SIZE, FILE_SIZE_THRESHOLD)); } /** * 通过自定义的配置类来实例化一个Web Application Context * * @param annotatedClasses * @return */ private AnnotationConfigWebApplicationContext createWebContext(Class<?>... annotatedClasses) { AnnotationConfigWebApplicationContext webContext = new AnnotationConfigWebApplicationContext(); webContext.register(annotatedClasses); return webContext; } }