因为功能不同,要避免Spring错误的加载到SpringMVC的bean
SpringMVC相关bean(表现层bean)
Spring控制的bean
SpringMVC相关bean加载控制
Spring相关bean加载控制
名称:@ComponentScan
类型:类注解
范例
package com.zhang.config; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.FilterType; import org.springframework.stereotype.Controller; @Configuration @ComponentScan(value = "com.zhang", excludeFilters = @ComponentScan.Filter( type = FilterType.ANNOTATION, classes = Controller.class )) public class SpringConfig { }
属性
创建spring容器加载spring配置文件,然后根据类型获取表现层的bean,如果不能获取则证明加载Spring控制的bean的时候成功排除掉SpringMVC控制的bean;这里值得一提的是,需要把SpringMVCConfig配置类上的@Configuration注释掉;
package com.zhang; import com.zhang.config.SpringConfig; import com.zhang.controller.UserController; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class App { public static void main(String[] args) { AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(SpringConfig.class); UserController userController = context.getBean(UserController.class); System.out.println(userController); } }
证明加载Spring控制的bean的时候成功排除掉SpringMVC控制的bean
extends AbstractDispatcherServletInitializer
public class ServletContainersInitConfig extends AbstractDispatcherServletInitializer { protected WebApplicationContext createServletApplicationContext() { AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext(); ctx.register(SpringMvcConfig.class); return ctx; } protected WebApplicationContext createRootApplicationContext() { AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext(); ctx.register(SpringConfig.class); return ctx; } protected String[] getServletMappings() { return new String[]{"/"}; } }
简化格式
extends AbstractAnnotationConfigDispatcherServletInitializer
public class ServletContainersInitConfig extends AbstractAnnotationConfigDispatcherServletInitializer{ protected Class<?>[] getServletConfigClasses() { return new Class[]{SpringMvcConfig.class} }; protected String[] getServletMappings() { return new String[]{"/"}; } protected Class<?>[] getRootConfigClasses() { return new Class[]{SpringConfig.class}; } }