spring boot整合shiro引用配置文件配置是出现的问题

Spring boot 整合shiro 使用yml配置文件

    最近自己玩一下springBoot配置 然后整合一下常用的框架，遇到一个问题。配置LifecycleBeanPostProcessorBean 的时候总是先于spring 读取yml文件。导致配置失败

	@Bean(name = "shiroEhcacheManager")
	public EhCacheManager getEhCacheManager() {
    	    EhCacheManager em = new EhCacheManager();
    	    em.setCacheManagerConfigFile(cacheManagerConfigFilePath);
    	    return em;
	}

Error initializing bean [shiroEhcacheManager]; nested exception is org.apache.shiro.cache.CacheException: 

java.lang.NullPointerException

很显然报出了一个空指针的错误，也就是 cacheManagerConfigFilePath 的值没有初始化成功，我原先以为我的yml文件配置错误，

回去检查了没问题，

于是我开始一个一个Bean 进行初始化，下面是我整个config的配置

@Configuration
@ConfigurationProperties(prefix = "shiro")
public class ShiroConfiguration {

    private String cacheManagerConfigFilePath;
    private String loginUrl;
    private String successUrl;

    private Map filterChainDefinitionMap = new LinkedHashMap();

    @Bean(name = "shiroRealm")
    public ShiroRealm getShiroRealm() {
        return new ShiroRealm();
    }

    @Bean(name = "shiroEhcacheManager")
    public EhCacheManager getEhCacheManager() {
        EhCacheManager em = new EhCacheManager();
        em.setCacheManagerConfigFile(cacheManagerConfigFilePath);
        return em;
    }

    @Bean(name = "lifecycleBeanPostProcessor")
    public static LifecycleBeanPostProcessor getLifecycleBeanPostProcessor() {
        return new LifecycleBeanPostProcessor();
    }

    @Bean
    public DefaultAdvisorAutoProxyCreator getDefaultAdvisorAutoProxyCreator() {
        DefaultAdvisorAutoProxyCreator daap = new DefaultAdvisorAutoProxyCreator();
        daap.setProxyTargetClass(true);
        return daap;
    }

    @Bean(name = "securityManager")
    public DefaultWebSecurityManager getDefaultWebSecurityManager(AuthorizingRealm shiroRealm,EhCacheManager ehCacheManager) {
        DefaultWebSecurityManager dwsm = new DefaultWebSecurityManager();
        dwsm.setRealm(shiroRealm);
        dwsm.setCacheManager(ehCacheManager);
        return dwsm;
    }

    @Bean
    public AuthorizationAttributeSourceAdvisor getAuthorizationAttributeSourceAdvisor(SecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor aasa = new AuthorizationAttributeSourceAdvisor();
        aasa.setSecurityManager(securityManager);
        return new AuthorizationAttributeSourceAdvisor();
    }

    @Bean(name = "shiroFilter")
    public ShiroFilterFactoryBean getShiroFilterFactoryBean(SecurityManager securityManager) {
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        shiroFilterFactoryBean
                .setSecurityManager(securityManager);
        shiroFilterFactoryBean.setLoginUrl(loginUrl);
        shiroFilterFactoryBean.setSuccessUrl(successUrl);
        //filterChainDefinitionMap.put("/sa/**", "authc");
        //filterChainDefinitionMap.put("/**", "anon");
        System.out.println(filterChainDefinitionMap);
        shiroFilterFactoryBean
                .setFilterChainDefinitionMap(filterChainDefinitionMap);
        return shiroFilterFactoryBean;
    }

    public String getCacheManagerConfigFilePath() {
        return cacheManagerConfigFilePath;
    }

    public void setCacheManagerConfigFilePath(String cacheManagerConfigFilePath) {
        this.cacheManagerConfigFilePath = cacheManagerConfigFilePath;
    }

    public String getLoginUrl() {
        return loginUrl;
    }

    public void setLoginUrl(String loginUrl) {
        this.loginUrl = loginUrl;
    }

    public String getSuccessUrl() {
        return successUrl;
    }

    public void setSuccessUrl(String successUrl) {
        this.successUrl = successUrl;
    }

    public  Map getFilterChainDefinitionMap() {
        return filterChainDefinitionMap;
    }

    public  void setFilterChainDefinitionMap(Map filterChainDefinitionMap) {
        this.filterChainDefinitionMap = filterChainDefinitionMap;
    }
}

如果我注释掉shiroEhcacheManager 以下所有bean的创建，项目能启动，当我@Bean(name = "lifecycleBeanPostProcessor")

创建这个bean的时候就抛出了上面的异常。这么分析过来问题应该出在这个bean上。

百度了一下，

LifecycleBeanPostProcessor用于在实现了Initializable接口的Shiro bean初始化时调用Initializable接口回调，在实现了Destroyable接口的

Shiro bean销毁时调用 Destroyable接口回调。

而我在创建的EhCacheManager 正是实现了Initializable接口，下面我截图了一张官方的在配置上面的说明

大概意思就是 使用@Configuration配置，会会在上下文初始化的时候强制的注入一些依赖。导致一下不可知的初始化。尤其是创建BeanPostProcessor 和

BeanFactoryPostProcessor的时候（LifecycleBeanPostProcessor正是BeanPostProcessor 的子类）。应该讲这些创建Bean的方法前面加上static。让使用configuration的类在没有实例化的时候不会去过早的要求@Autowired和@Value

进行注入。

最后解决问题很简单，只要在创建LifecycleBeanPostProcessor的方法变为静态static方法。

其实我也没有彻底弄清楚出现这个问题的根本原因，如果有其他人知道的话，请指出来共同学习。