package com.wbg.springJavaConfig.spring;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;import javax.servlet.ServletContext;
import javax.servlet.ServletRegistration;@Configuration//声明当前类是一个配置类（相当于一个Spring的xml文件）
@EnableWebMvc//若无此注解，WebMvcConfigurerAdapter无效
/**** @ComponentScan 扫描（"xxx"）包下的@Service、@Controller、@Component、@Repository的类，并注册为Bean*相当于：<context:component-scan base-package="xxx" />*/
@ComponentScan("com.wbg.springJavaConfig.controller")
public class SpringConfig extends WebMvcConfigurerAdapter {/*** @Bean 相当Spring配置文件bean节点* 添加一个ViewResolver解析view 配置jsp* @return InternalResourceViewResolver* 这里的配置相当于：* <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">*         <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />*         <property name="prefix" value="/WEB-INF/jsp/" />*         <property name="suffix" value=".jsp" />*     </bean>*/@Beanpublic InternalResourceViewResolver viewResolver(){InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();viewResolver.setPrefix("/WEB-INF/views/");viewResolver.setSuffix(".jsp");viewResolver.setViewClass(JstlView.class);return viewResolver;}}
class WebInitializer implements WebApplicationInitializer {/*** <context-param>*         <param-name>contextConfigLocation</param-name>*         <param-value>classpath:spring/spring-*.xml</param-value>*     </context-param>*     <listener>*         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>*     </listener>*** <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>*         <init-param>*             <param-name>contextConfigLocation</param-name>*             <param-value>classpath:spring-web.xml</param-value>*         </init-param>** @param servletContext*/public void onStartup(ServletContext servletContext){AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();ctx.register(SpringConfig.class);ctx.setServletContext(servletContext);ServletRegistration.Dynamic dynamic = servletContext.addServlet("dispatcher",new DispatcherServlet(ctx));dynamic.addMapping("/");dynamic.setLoadOnStartup(1);}}

package com.wbg.springJavaConfig.spring2;import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;public class WebInit extends AbstractAnnotationConfigDispatcherServletInitializer {@Overrideprotected Class<?>[] getRootConfigClasses() {return new Class[]{ContextConfig.class};}@Overrideprotected Class<?>[] getServletConfigClasses() {return new Class[]{SpringWebConfig.class};}@Overrideprotected String[] getServletMappings() {return new String[]{"/"};}
}

package com.wbg.springJavaConfig.spring2;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.multipart.support.StandardServletMultipartResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;@Configuration
public class SpringWebConfig {@Beanpublic InternalResourceViewResolver internalResourceViewResolverConfig(){InternalResourceViewResolver resolver = new InternalResourceViewResolver();resolver.setViewClass(JstlView.class);resolver.setPrefix("/WEB-INF/jsp/");resolver.setSuffix(".jsp");return resolver;}@Beanpublic StandardServletMultipartResolver multipartResolverConfig(){return new StandardServletMultipartResolver();}public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {configurer.enable();//对静态资源的请求转发到容器缺省的servlet,而不使用 DispatcherServlet
    }
}

package com.wbg.springJavaConfig.spring2;import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;@Configuration
@EnableWebMvc
@ComponentScan(basePackages = {"com.wbg.springJavaConfig.controller"},excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION,value = EnableWebMvc.class)})
public class ContextConfig {
}