Spring整合Shiro做权限控制模块详细案例分析

1.引入Shiro的Maven依赖

<!-- Spring 整合Shiro需要的依赖 -->

    <dependency>
        <groupId>org.apache.shiro</groupId>
        <artifactId>shiro-core</artifactId>
        <version>1.2.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.shiro</groupId>
        <artifactId>shiro-web</artifactId>
        <version>1.2.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.shiro</groupId>
        <artifactId>shiro-ehcache</artifactId>
        <version>1.2.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.shiro</groupId>
        <artifactId>shiro-spring</artifactId>
        <version>1.2.1</version>
    </dependency>
    <!-- 除此之外还有一些东西也不可少spring, spring-mvc, ibatis等 spring.3.1.2 spring-mvc.3.1.2
        ibatis.2.3.4 cglib.2.2 -->

2.web.xml中配置

 <!-- 配置shiro的核心拦截器 -->
    <filter>
        <filter-name>shiroFilter</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>shiroFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping> 

3.    编写自己的UserRealm类继承自Realm，主要实现认证和授权的管理操作

package com.jay.demo.shiro;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.LockedAccountException;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.springframework.beans.factory.annotation.Autowired;

import com.jay.demo.bean.Permission;
import com.jay.demo.bean.Role;
import com.jay.demo.bean.User;
import com.jay.demo.service.UserService;

public class UserRealm extends AuthorizingRealm{

    @Autowired
    private UserService userService;

    /**
     * 授权操作
     */
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
//        String username = (String) getAvailablePrincipal(principals);
        String username = (String) principals.getPrimaryPrincipal();

        Set<Role> roleSet =  userService.findUserByUsername(username).getRoleSet();
        //角色名的集合
        Set<String> roles = new HashSet<String>();
        //权限名的集合
        Set<String> permissions = new HashSet<String>();

        Iterator<Role> it = roleSet.iterator();
        while(it.hasNext()){
            roles.add(it.next().getName());
            for(Permission per:it.next().getPermissionSet()){
                permissions.add(per.getName());
            }
        }

        SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo();

        authorizationInfo.addRoles(roles);
        authorizationInfo.addStringPermissions(permissions);

        return authorizationInfo;
    }

    /**
     * 身份验证操作
     */
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(
            AuthenticationToken token) throws AuthenticationException {

        String username = (String) token.getPrincipal();
        User user = userService.findUserByUsername(username);

        if(user==null){
            //木有找到用户
            throw new UnknownAccountException("没有找到该账号");
        }
        /* if(Boolean.TRUE.equals(user.getLocked())) {
                throw new LockedAccountException(); //帐号锁定
            } */

        /**
         * 交给AuthenticatingRealm使用CredentialsMatcher进行密码匹配，如果觉得人家的不好可以在此判断或自定义实现
         */
        SimpleAuthenticationInfo info = new SimpleAuthenticationInfo(user.getUsername(), user.getPassword(),getName());

        return info;
    }

    @Override
    public String getName() {
        return getClass().getName();
    }

}

4.在Spring的applicationContext.xml中进行Shiro的相关配置

1、添加shiroFilter定义

<!-- Shiro Filter -->
<bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
    <property name="securityManager" ref="securityManager" />
    <property name="loginUrl" value="/login" />
    <property name="successUrl" value="/user/list" />
    <property name="unauthorizedUrl" value="/login" />
    <property name="filterChainDefinitions">
        <value>
            /login = anon
            /user/** = authc
            /role/edit/* = perms[role:edit]
            /role/save = perms[role:edit]
            /role/list = perms[role:view]
            /** = authc
        </value>
    </property>
</bean>  

2、添加securityManager定义

<bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
    <property name="realm" ref="myRealm" />
</bean>  

3、添加realm定义

<bean id=" myRealm" class="com.jay.demo.shiro.UserRealm/>

4、配置EhCache

<bean id="cacheManager" class="org.apache.shiro.cache.ehcache.EhCacheManager" />

5、保证实现了Shiro内部lifecycle函数的bean执行

<bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/>

特别注意：

如果使用Shiro相关的注解，需要在springmvc-servlet.xml中配置一下信息

<bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" depends-on="lifecycleBeanPostProcessor"/>
<bean class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor">
    <property name="securityManager" ref="securityManager"/>
</bean>

备注：Shiro权限管理的过滤器解释：

默认过滤器(10个)
anon -- org.apache.shiro.web.filter.authc.AnonymousFilter
authc -- org.apache.shiro.web.filter.authc.FormAuthenticationFilter
authcBasic -- org.apache.shiro.web.filter.authc.BasicHttpAuthenticationFilter
perms -- org.apache.shiro.web.filter.authz.PermissionsAuthorizationFilter
port -- org.apache.shiro.web.filter.authz.PortFilter
rest -- org.apache.shiro.web.filter.authz.HttpMethodPermissionFilter
roles -- org.apache.shiro.web.filter.authz.RolesAuthorizationFilter
ssl -- org.apache.shiro.web.filter.authz.SslFilter
user -- org.apache.shiro.web.filter.authc.UserFilter
logout -- org.apache.shiro.web.filter.authc.LogoutFilter

anon：例子/admins/**=anon 没有参数，表示可以匿名使用。
authc：例如/admins/user/**=authc表示需要认证(登录)才能使用，没有参数
roles：例子/admins/user/**=roles[admin],参数可以写多个，多个时必须加上引号，并且参数之间用逗号分割，当有多个参数时，例如admins/user/**=roles["admin,guest"],每个参数通过才算通过，相当于hasAllRoles()方法。
perms：例子/admins/user/**=perms[user:add:*],参数可以写多个，多个时必须加上引号，并且参数之间用逗号分割，例如/admins/user/**=perms["user:add:*,user:modify:*"]，当有多个参数时必须每个参数都通过才通过，想当于isPermitedAll()方法。
rest：例子/admins/user/**=rest[user],根据请求的方法，相当于/admins/user/**=perms[user:method] ,其中method为post，get，delete等。
port：例子/admins/user/**=port[8081],当请求的url的端口不是8081是跳转到schemal://serverName:8081?queryString,其中schmal是协议http或https等，serverName是你访问的host,8081是url配置里port的端口，queryString是你访问的url里的？后面的参数。
authcBasic：例如/admins/user/**=authcBasic没有参数表示httpBasic认证
ssl：例子/admins/user/**=ssl没有参数，表示安全的url请求，协议为https
user：例如/admins/user/**=user没有参数表示必须存在用户，当登入操作时不做检查 

关于Shiro的标签应用：

<shiro:authenticated> 登录之后
<shiro:notAuthenticated> 不在登录状态时
<shiro:guest> 用户在没有RememberMe时
<shiro:user> 用户在RememberMe时
<shiro:hasAnyRoles name="abc,123" > 在有abc或者123角色时
<shiro:hasRole name="abc"> 拥有角色abc
<shiro:lacksRole name="abc"> 没有角色abc
<shiro:hasPermission name="abc"> 拥有权限abc
<shiro:lacksPermission name="abc"> 没有权限abc
<shiro:principal> 显示用户登录名  

以上是Shiro的相关配置，出于安全的考虑，一般都会使用ACL(基于角色的用户权限管理去控制用户登录后的权限)