Spring java配置

容器一开始自动加载的配置：相当于web.xml

package config;

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

import javax.servlet.MultipartConfigElement;
import javax.servlet.ServletRegistration;

public class MyWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[]{RootConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[]{WebMvcConfig.class};
    }

    @Override
    protected String[] getServletMappings() {//将请求映射到DispatcherServlet上
        return new String[]{"/"};
    }

    @Override//通过重载，可以对DispatcherServlet进行额外的设置
    protected void customizeRegistration(ServletRegistration.Dynamic registration) {
        registration.setMultipartConfig(
                new MultipartConfigElement("D:\springuploads")
        );
    }
}

springmvc 部分的配置

@Configuration
@EnableWebMvc
@ComponentScan("Controller")
public class WebMvcConfig  extends WebMvcConfigurerAdapter {

        //配置视图解析器

    @Bean
    public ViewResolver viewResolver(){
        InternalResourceViewResolver resolver=new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        resolver.setExposeContextBeansAsAttributes(true);
        resolver.setViewClass(JstlView.class);
        return  resolver;
    }

    @Override
    public void configureDefaultServletHandling(
            DefaultServletHandlerConfigurer configurer) {
        configurer.enable();//对静态资源的请求转发到servlet容器默认的servlet上
        //而不是使用dispatcherServlet来处理
    }
}

spring bean 部分的配置

package config;

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
@ComponentScan(
        basePackages = {"bean"},
        excludeFilters = {
                @ComponentScan.Filter(type = FilterType.ANNOTATION,
                        value = EnableWebMvc.class)
        }
)
public class RootConfig {

}