SpringBoot与Shrio（四）缓存部分

引

因为每次都要查一遍数据库拿授权，更别说用户特别多，并发什么的了，数据库负担太大，所以就要启用缓存

Cache Manager

shiro架构里边有一个管理缓存的组件，默认用ehcache实现，看一下它的缓存管理

public abstract class CachingRealm implements Realm, Nameable, CacheManagerAware, LogoutAware {
    private static final Logger log = LoggerFactory.getLogger(CachingRealm.class);
    private static final AtomicInteger INSTANCE_COUNT = new AtomicInteger();
    private String name;
    private boolean cachingEnabled = true;
    private CacheManager cacheManager;

里边有个CacheManager ，说明以后可以通过他修改缓存的实现，先用EhCacheManager整起。
pom依赖加入

		<dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-ehcache</artifactId>
            <version>1.7.0</version>
        </dependency>

shiro配置类关于自定义Realm的部分开启缓存即可

//创建自定义Realm
    @Bean("customerRealm")
    public Realm getRealm(){
        CustomerRealm customerRealm = new CustomerRealm();
        //修改凭证校验匹配器
        HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
        //设置算法为MD5
        hashedCredentialsMatcher.setHashAlgorithmName("md5");
        //设置散列次数
        hashedCredentialsMatcher.setHashIterations(1024);
        customerRealm.setCredentialsMatcher(hashedCredentialsMatcher);

        //开启缓存管理
        customerRealm.setCacheManager(new EhCacheManager());
        customerRealm.setCachingEnabled(true);//开启全局缓存
        customerRealm.setAuthenticationCachingEnabled(true);//开启认证缓存
        customerRealm.setAuthenticationCacheName("authenticationCache");//认证缓存名字
        customerRealm.setAuthorizationCachingEnabled(true);//开启授权缓存
        customerRealm.setAuthorizationCacheName("authorizationCache");//授权缓存名字

        return customerRealm;
    }