// 核心配置类
package spittr.config;import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;public class SpittrWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{@Overrideprotected Class<?>[] getRootConfigClasses() {// TODO Auto-generated method stubreturn new Class<?>[] {RootConfig.class};}@Overrideprotected Class<?>[] getServletConfigClasses() {// 指定配置类return new Class<?>[] {WebConfig.class};}/*** 将一个或多个路径映射到DispatcherServlet上*/@Overrideprotected String[] getServletMappings() {// 将DispatcherServlet映射到“/”return new String[] {"/"};}}

package spittr.config;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.view.InternalResourceViewResolver;@Configuration
@EnableWebMvc // 启用Spring MVC
@ComponentScan("spittr.web") // 启用组件扫描
public class WebConfig implements WebMvcConfigurer {/*** 配置JSP视图解析器* * @return*/@Beanpublic ViewResolver viewResolver() {InternalResourceViewResolver resolver = new InternalResourceViewResolver();resolver.setPrefix("/WEB-INF/views/");resolver.setSuffix(".jsp");resolver.setExposeContextBeansAsAttributes(true);return resolver;}@Overridepublic void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {configurer.enable();}}

package spittr.config;import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;@Configuration
@ComponentScan(basePackages= {"spitter"},excludeFilters= {@Filter(type=FilterType.ANNOTATION, value=EnableWebMvc.class)})
public class RootConfig {}

package spittr.web; import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;@Controller
public class HomeController {static {System.out.println("=============HomeController============");}@RequestMapping("/home")public String home() {System.out.println("hellow");return "home";}
}