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package com.example.config;import org.apache.shiro.spring.web.ShiroFilterFactoryBean;import org.apache.shiro.web.mgt.DefaultWebSecurityManager;import org.springframework.beans.factory.annotation.Qualifier;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class ShiroConfig {
   		//第三步	public ShiroFilterFactoryBean getShiroFilterFactoryBean(@Qualifier("securityManager")DefaultWebSecurityManager securityManager){
   		ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();		shiroFilterFactoryBean.setSecurityManager(securityManager);		return shiroFilterFactoryBean;	}		//第二步	@Bean("securityManager")	public DefaultWebSecurityManager getDefaultWebSecurityManager(@Qualifier("userRealm")UserRealm userRealm){
   		DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();		securityManager.setRealm(userRealm);		return securityManager;	}		//第一步	@Bean("userRealm")	public UserRealm getRealm(){
   		return new UserRealm();	}}

@Qualifier注解：

接收spring容器中对应名字的实体对象

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