shiro修改密码后原密码能登录，而新密码不可以登录

 

又看了一遍源码才找到问题，可能解决方法有点土，各位大神还望给点意见

 

shiro的logout登出，只是将放置PrincipalCollection这个集合置空，删除了session，但是没有清空缓存，所以当修改密码重新登录的时候，按照以下流程，调试模式，一步步走

controller中的

subject.login(token);

 

 

 

 

（下面均为shiro源码中的）

DelegatingSubject类

public void login(AuthenticationToken token) throws AuthenticationException {
        clearRunAsIdentitiesInternal();
        Subject subject = securityManager.login(this, token);//这个方法

        PrincipalCollection principals;

        String host = null;

        if (subject instanceof DelegatingSubject) {
            DelegatingSubject delegating = (DelegatingSubject) subject;
            //we have to do this in case there are assumed identities - we don't want to lose the 'real' principals:
            principals = delegating.principals;
            host = delegating.host;
        } else {
            principals = subject.getPrincipals();
        }

        if (principals == null || principals.isEmpty()) {
            String msg = "Principals returned from securityManager.login( token ) returned a null or " +
                    "empty value.  This value must be non null and populated with one or more elements.";
            throw new IllegalStateException(msg);
        }
        this.principals = principals;
        this.authenticated = true;
        if (token instanceof HostAuthenticationToken) {
            host = ((HostAuthenticationToken) token).getHost();
        }
        if (host != null) {
            this.host = host;
        }
        Session session = subject.getSession(false);
        if (session != null) {
            this.session = decorate(session);
        } else {
            this.session = null;
        }
    }

 

进入DefaultSecurityManager类

public Subject login(Subject subject, AuthenticationToken token) throws AuthenticationException {
        AuthenticationInfo info;
        try {
            info = authenticate(token);//这个方法
        } catch (AuthenticationException ae) {
            try {
                onFailedLogin(token, ae, subject);
            } catch (Exception e) {
                if (log.isInfoEnabled()) {
                    log.info("onFailedLogin method threw an " +
                            "exception.  Logging and propagating original AuthenticationException.", e);
                }
            }
            throw ae; //propagate
        }

        Subject loggedIn = createSubject(token, info, subject);

        onSuccessfulLogin(token, info, loggedIn);

        return loggedIn;
    }

 

AuthenticatingSecurityManager类

public AuthenticationInfo authenticate(AuthenticationToken token) throws AuthenticationException {
        return this.authenticator.authenticate(token);
    }

点进去authenticator 这个的构造

private Authenticator authenticator;

    /**
     * Default no-arg constructor that initializes its internal
     * authenticator instance to a
     * {@link org.apache.shiro.authc.pam.ModularRealmAuthenticator ModularRealmAuthenticator}.
     */
    public AuthenticatingSecurityManager() {
        super();
        this.authenticator = new ModularRealmAuthenticator();
    }

发现是在ModularRealmAuthenticator这个里面创建的

点开该类

 protected AuthenticationInfo doSingleRealmAuthentication(Realm realm, AuthenticationToken token) {
        if (!realm.supports(token)) {
            String msg = "Realm [" + realm + "] does not support authentication token [" +
                    token + "].  Please ensure that the appropriate Realm implementation is " +
                    "configured correctly or that the realm accepts AuthenticationTokens of this type.";
            throw new UnsupportedTokenException(msg);
        }
        AuthenticationInfo info = realm.getAuthenticationInfo(token);
        if (info == null) {
            String msg = "Realm [" + realm + "] was unable to find account data for the " +
                    "submitted AuthenticationToken [" + token + "].";
            throw new UnknownAccountException(msg);
        }
        return info;
    }

发现info是通过realm来获取的

重点来了

在这里的获取info时，会判断是否从缓存中取

public final AuthenticationInfo getAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {

        AuthenticationInfo info = getCachedAuthenticationInfo(token);//看这里
        if (info == null) {
            //otherwise not cached, perform the lookup:
            info = doGetAuthenticationInfo(token);
            log.debug("Looked up AuthenticationInfo [{}] from doGetAuthenticationInfo", info);
            if (token != null && info != null) {
                cacheAuthenticationInfoIfPossible(token, info);
            }
        } else {
            log.debug("Using cached authentication info [{}] to perform credentials matching.", info);
        }

        if (info != null) {
            assertCredentialsMatch(token, info);
        } else {
            log.debug("No AuthenticationInfo found for submitted AuthenticationToken [{}].  Returning null.", token);
        }

        return info;
    }

下面看一下从缓存中怎么取的

private AuthenticationInfo getCachedAuthenticationInfo(AuthenticationToken token) {
        AuthenticationInfo info = null;

        Cache cache = getAvailableAuthenticationCache();
        if (cache != null && token != null) {
            log.trace("Attempting to retrieve the AuthenticationInfo from cache.");
            Object key = getAuthenticationCacheKey(token);
            info = cache.get(key);
            if (info == null) {
                log.trace("No AuthorizationInfo found in cache for key [{}]", key);
            } else {
                log.trace("Found cached AuthorizationInfo for key [{}]", key);
            }
        }

        return info;
    }

从传递过来的token中获取key，这个key就是当前登录名

然后获取info，如果有这个实体，就不会再创建了

 

然后在这里会在缓存中查找info，这个时候里面存的是有数据的，也就是以前的密码和账号，所以就不会再新建，在执行验证的时候会验证以前的密码（注意;在认证的时候才会执行数据库查询，所以即使数据库密码已经修改也没有用）

 

解决办法：在shiro的缓存中将其清掉

目前解决办法，欢迎各位大神补充

另：从源码来看shiro

这个写个shiro的执行过程，比较详细