public interface Cache<K, V> { 
 //根据Key获取缓存中的值 
 public V get(K key) throws CacheException; 
 //往缓存中放入key-value，返回缓存中之前的值 
 public V put(K key, V value) throws CacheException; 
 //移除缓存中key对应的值，返回该值 
 public V remove(K key) throws CacheException; 
 //清空整个缓存 
 public void clear() throws CacheException; 
 //返回缓存大小 
 public int size(); 
 //获取缓存中所有的key 
 public Set<K> keys(); 
 //获取缓存中所有的value 
 public Collection<V> values(); 
} 

public interface CacheManager { 
 //根据缓存名字获取一个Cache 
 public <K, V> Cache<K, V> getCache(String name) throws CacheException; 
}

public interface CacheManagerAware { 
 //注入CacheManager 
 void setCacheManager(CacheManager cacheManager); 
} 

userRealm=com.github.zhangkaitao.shiro.chapter11.realm.UserRealm 
userRealm.credentialsMatcher=$credentialsMatcher 
userRealm.cachingEnabled=true 
userRealm.authenticationCachingEnabled=true 
userRealm.authenticationCacheName=authenticationCache
userRealm.authorizationCachingEnabled=true 
userRealm.authorizationCacheName=authorizationCache 
securityManager.realms=$userRealm 
cacheManager=org.apache.shiro.cache.ehcache.EhCacheManager 
cacheManager.cacheManagerConfigFile=classpath:shiro-ehcache.xml 
securityManager.cacheManager=$cacheManager 

this.manager = new net.sf.ehcache.CacheManager(getCacheManagerConfigFileInputStream());

this.manager = net.sf.ehcache.CacheManager.create(getCacheManagerConfigFileInputStream()); 

@Test 
public void testClearCachedAuthenticationInfo() { 
 login(u1.getUsername(), password); 
 userService.changePassword(u1.getId(), password + "1");
 RealmSecurityManager securityManager = 
  (RealmSecurityManager) SecurityUtils.getSecurityManager(); 
 UserRealm userRealm = (UserRealm) securityManager.getRealms().iterator().next(); 
 userRealm.clearCachedAuthenticationInfo(subject().getPrincipals()); 
 login(u1.getUsername(), password + "1"); 
} 

@Test 
public void testClearCachedAuthorizationInfo() { 
 login(u1.getUsername(), password); 
 subject().checkRole(r1.getRole()); 
 userService.correlationRoles(u1.getId(), r2.getId()); 
 RealmSecurityManager securityManager = 
  (RealmSecurityManager) SecurityUtils.getSecurityManager(); 
 UserRealm userRealm = (UserRealm)securityManager.getRealms().iterator().next(); 
 userRealm.clearCachedAuthorizationInfo(subject().getPrincipals()); 
 
 subject().checkRole(r2.getRole()); 
} 

securityManager.cacheManager=$cacheManager 

sessionManager=org.apache.shiro.session.mgt.DefaultSessionManager 
securityManager.sessionManager=$sessionManager 

sessionDAO=com.github.zhangkaitao.shiro.chapter11.session.dao.MySessionDAO 
sessionDAO.activeSessionsCacheName=shiro-activeSessionCache 
activeSessionsCacheName默认就是shiro-activeSessionCache。