spring mvc dispatcherservlet 07：Spring MVC用JavaConfig代替xml搭(2)

相当于web.xml

package pers.hanchao.configuration;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

/**
 * <p>实现了WebApplicationInitializer接口，是web.xml的替代方式</p>
 * @author hanchao 2018/1/20 19:40
 **/
public class MyWebApplicationInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    /**
     * <p>用于获取Spring应用容器的配置文件</p>
     * @author hanchao 2018/1/20 19:55
     **/
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[]{MySpringMVCConfiguration.class};
    }

    /**
     * <p>获取Spring MVC应用容器</p>
     * @author hanchao 2018/1/20 19:55
     **/
    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[0];
    }

    /**
     * <p>负责指定需要由DispatcherServlet映射的路径</p>
     * @author hanchao 2018/1/20 19:56
     **/
    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}

相当于spring-mvc-servlet.xml

package pers.hanchao.configuration;

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.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

//声明这是一个配置文件，类似于applicationcontext.xml
@Configuration
//开启注解，等同于<mvc:annotation-driven/>
@EnableWebMvc
//开启自动装配，等同于 context:component-scan base-package="pers.hanchao.*"
@ComponentScan(basePackages = "pers.hanchao.*")
public class MySpringMVCConfiguration {

    /**
     * 视图解析器，相当于：
     * <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
     *      <property name="prefix" value="/"/>
     *      <property name="suffix" value=".jsp"/>
     * </bean>
     */
    @Bean
    public ViewResolver viewResolver(){
        InternalResourceViewResolver internalResourceViewResolver = new InternalResourceViewResolver();
        internalResourceViewResolver.setPrefix("/");
        internalResourceViewResolver.setSuffix(".jsp");
        return internalResourceViewResolver;
    }
}

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