SpringMVC的配置2种（本质上还是一样的，实现的接口不同）

���一种SpringInitConfig extends AbstractAnnotationConfigDispatcherServletInitializer

看第一种配置

package com.xxx.config;import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;public class SpringInitConfig extends AbstractAnnotationConfigDispatcherServletInitializer {    /**     * //加载spring容器配置     * 加载根配置类     * @return     */    @Override    protected Class[] getRootConfigClasses() {        return new Class[]{RootConfig.class};    }    /**     * 加载springmvc配置类(web容器配置类)     * @return     */    @Override    protected Class[] getServletConfigClasses() {        return new Class[]{WebConfig.class};    }    /**     * 设置哪些请求归属springMVC处理     * 配置SpringMVC的映射路径(访问路径)     * 配置SpringMVC拦截哪些请求(哪些请求应该交给DispatcherServlet来处理)     * @return     * return new String[]{"/"}; 拦截所有请求，但不拦截jsp页面 (相当于自动进入SpringMVC里面)     * return new String[]{"/*"}; 表示拦截所有请求 (也相当于自动进入SpringMVC里面)     * return new String[0];     html和jsp两个页面都可以访问到     */    @Override    protected String[] getServletMappings() {        return new String[]{"/*"};    }}

WebConfig代码

package com.xxx.config;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;import org.springframework.web.servlet.config.annotation.EnableWebMvc;import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;/** * SpringMVC配置类(管理的是配置类) *  -管理控制器(Servlet) *  @EnableWebMvc:开启SpringMVC注解，开启后可以使用SpringMVC提供的相关注解 */@Configuration@ComponentScan("com.xxx.controller")@EnableWebMvcpublic class WebConfig implements WebMvcConfigurer {    //放行静态资源    @Override    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {        configurer.enable();    }}

第二种ServletContainersInitConfig extends AbstractDispatcherServletInitializer

第二种还没配根(Spring)容器

package com.xxx.config;import org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;import org.springframework.web.servlet.support.AbstractDispatcherServletInitializer;//4.定义一个servlet容器启动的配置类，在里面加载spring的配置public class ServletContainersInitConfig extends AbstractDispatcherServletInitializer {    //加载springMVC容器配置    @Override    protected WebApplicationContext createServletApplicationContext() {        AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();        ctx.register(SpringMvcConfig.class);        return ctx;    }    //设置哪些请求归属springMVC处理    @Override    protected String[] getServletMappings() {        return new String[]{"/"};    }    //加载spring容器配置    @Override    protected WebApplicationContext createRootApplicationContext() {        return null;    }}

SpringMvcConfig代码

package com.xxx.config;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;//3.创建springmvc的配置文件，加载controller对应的bean@Configuration@ComponentScan("com.xxx.controller")public class SpringMvcConfig {}