第一种SpringInitConfig extends AbstractAnnotationConfigDispatcherServletInitializer
看第一种配置
java
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
java
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")
@EnableWebMvc
public 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
java
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
java
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 {
}