SpringMVC集成Shiro、读取数据库操作权限

1、Maven添加Shiro所需的jar包

        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-core</artifactId>
            <version>${shiroversion}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-ehcache</artifactId>
            <version>${shiroversion}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-web</artifactId>
            <version>${shiroversion}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>${shiroversion}</version>
        </dependency>
        <dependency>
            <groupId>com.github.theborakompanioni</groupId>
            <artifactId>thymeleaf-extras-shiro</artifactId>
            <version>2.0.0</version>
        </dependency>

ps：老夫用的1.4.0版本， ${shiroversion} 用 1.4.0替代就好

2、添加 spring-shiro.xml文件，解释说明都在注释里了

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.2.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">

    <!-- 继承自AuthorizingRealm的自定义Realm,即指定Shiro验证用户登录的类为自定义的UserRealm.java -->
    <bean id="userRealm" class="com.***.shiro.UserRealm"/>

    <!-- Shiro默认会使用Servlet容器的Session,可通过sessionMode属性来指定使用Shiro原生Session -->
    <!-- 即<property name="sessionMode" value="native"/>,详细说明见官方文档 -->
    <!-- 这里主要是设置自定义的单Realm应用,若有多个Realm,可使用'realms'属性代替 -->
    <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
        <property name="realm" ref="userRealm"/>
    </bean>

    <!-- Shiro主过滤器本身功能十分强大,其强大之处就在于它支持任何基于URL路径表达式的、自定义的过滤器的执行 -->
    <!-- Web应用中,Shiro可控制的Web请求必须经过Shiro主过滤器的拦截,Shiro对基于Spring的Web应用提供了完美的支持 -->
    <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
        <!-- Shiro的核心安全接口,这个属性是必须的 -->
        <property name="securityManager" ref="securityManager"/>
        <!-- 要求登录时的链接(可根据项目的URL进行替换),非必须的属性,默认会自动寻找Web工程根目录下的"/login.html"页面 -->
        <property name="loginUrl" value="/login.jsp"/>
        <!-- 登录成功后要跳转的连接 -->
        <property name="successUrl" value="/views/admin/common/master.jsp"/>
        <!-- 用户访问未对其授权的资源时,所显示的连接 -->
        <!-- 若想更明显的测试此属性可以修改它的值,如unauthor.jsp,然后用[玄玉]登录后访问/admin/listUser.jsp就看见浏览器会显示unauthor.jsp -->
        <!-- <property name="unauthorizedUrl" value="/no_permissions.jsp" />  -->
        <!-- Shiro连接约束配置,即过滤链的定义 -->
        <!-- 此处可配合我的这篇文章来理解各个过滤连的作用http://blog.csdn.net/jadyer/article/details/12172839 -->
        <!-- 下面value值的第一个'/'代表的路径是相对于HttpServletRequest.getContextPath()的值来的 -->
        <!-- anon：它对应的过滤器里面是空的,什么都没做,这里.do和.jsp后面的*表示参数,比方说login.jsp?main这种 -->
        <!-- authc：该过滤器下的页面必须验证后才能访问,它是Shiro内置的一个拦截器org.apache.shiro.web.filter.authc.FormAuthenticationFilter -->
        <property name="filterChainDefinitions">
            <value>
                <!-- anon表示此地址不需要任何权限即可访问 -->
                /static/** = anon
                /resources/** = anon
                /admin/login.do = anon
                /** = authc
            </value>
        </property>
    </bean>
    <!-- Shiro生命周期处理器 -->
    <bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/>

    <!-- Shiro的注解配置放在spring-mvc中 -->

</beans>

3、web.xml里面添加 spring-shiro.xml 的引入

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath:spring-base.xml,classpath:spring-mybatis.xml,classpath:spring-druid.xml,classpath:spring-shiro.xml
        </param-value>
    </context-param>

4、在 spring-mvc.xml 里开启 shiro 的的注解

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

配置文件就到此结束了，下面自己创建一个 UserRealm；

5、创建一个继承自AuthorizingRealm的自定义Realm,即指定Shiro验证用户登录的类为自定义的UserRealm.java

package com.***.shiro;

import java.util.ArrayList;
import java.util.List;

import javax.annotation.Resource;

import org.apache.commons.lang.builder.ReflectionToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authz.AuthorizationException;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.subject.Subject;

import com.**.entity.Admin;
import com.**.entity.Permissions;
import com.**.entity.Role;
import com.**.entity.form.AdminForm;
import com.**.entity.form.PermissionsForm;
import com.**.entity.form.RoleForm;
import com.**.service.IAdminService;
import com.**.service.IPermissionsService;
import com.**.service.IRoleService;

public class UserRealm extends AuthorizingRealm {

    @Resource
    private IAdminService adminService;
    @Resource
    private IRoleService roleService;
    @Resource
    private IPermissionsService permissionsService;

    /**
     * 为当前登录的Subject授予角色和权限
     */
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        // 获取当前登录的用户名,等价于(String)principals.fromRealm(this.getName()).iterator().next()
        String username = (String) super.getAvailablePrincipal(principals);
        List<String> roleList = new ArrayList<String>();
        List<String> permissionList = new ArrayList<String>();
        // 从数据库中获取当前登录用户的详细信息
        AdminForm form = new AdminForm();
        form.setUserName(username);
        Admin admin = adminService.getList(form).get(0);
        if (null != admin) {
            // 实体类User中包含有用户角色的实体类信息
            if (null != admin.getRoleId()) {
                // 获取当前登录用户的角色
                RoleForm roleForm = new RoleForm();
                roleForm.setId(admin.getRoleId());

                Role role = roleService.getList(roleForm).get(0);
                roleList.add(role.getName());

                // 实体类Role中包含有角色权限的实体类信息
                if (null != role.getPermissionsList()) {
                    String permissionsList[] = role.getPermissionsList().split(",");
                    // 获取权限
                    for (int i = 0; i < permissionsList.length; i++) {
                        PermissionsForm permissionsForm = new PermissionsForm();
                        permissionsForm.setId(Integer.parseInt(permissionsList[i]));

                        Permissions permi = permissionsService.getList(permissionsForm).get(0);
                        permissionList.add(permi.getCode());
                    }
                }
            }
        } else {
            throw new AuthorizationException();
        }
        // 为当前用户设置角色和权限
        SimpleAuthorizationInfo simpleAuthorInfo = new SimpleAuthorizationInfo();
        simpleAuthorInfo.addRoles(roleList);
        simpleAuthorInfo.addStringPermissions(permissionList);
        return simpleAuthorInfo;
    }

    /**
     * 验证当前登录的Subject
     *
     * @see 经测试:本例中该方法的调用时机为LoginController.login()方法中执行Subject.login()时
     */
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authcToken)
            throws AuthenticationException {
        // 获取基于用户名和密码的令牌
        // 实际上这个authcToken是从AdminController里面currentUser.login(token)传过来的
        UsernamePasswordToken token = (UsernamePasswordToken) authcToken;
        System.err.println(
                "验证当前Subject时获取到token为" + ReflectionToStringBuilder.toString(token, ToStringStyle.MULTI_LINE_STYLE));
        AdminForm form = new AdminForm();
        form.setUserName(token.getUsername());
        Admin admin = adminService.getList(form).get(0);
        if (null != admin) {
            AuthenticationInfo authcInfo = new SimpleAuthenticationInfo(admin.getUserName(), admin.getPassword(),
                    admin.getId().toString());
            this.setSession("currentUser", admin);
            return authcInfo;
        } else {
            return null;
        }
    }

    /**
     * 将一些数据放到ShiroSession中,以便于其它地方使用
     *
     * @see 比如Controller,使用时直接用HttpSession.getAttribute(key)就可以取到
     */
    private void setSession(Object key, Object value) {
        Subject currentUser = SecurityUtils.getSubject();
        if (null != currentUser) {
            Session session = currentUser.getSession();
            System.out.println("Session默认超时时间为[" + session.getTimeout() + "]毫秒");
            if (null != session) {
                session.setAttribute(key, value);
            }
        }
    }
}

数据库、实体、Dao配置省略。。。

附：表片段

6、在登录方法中，登录成功后将用户添加到 shiro 的 Subject 中

UsernamePasswordToken token = new UsernamePasswordToken(admin.getUserName(), admin.getPassword());

Subject currentUser = SecurityUtils.getSubject();
currentUser.login(token);

7、在需要访问权限的方法上添加 @RequiresPermissions() 注解

　　 @RequestMapping("/permissionsList")
    @RequiresPermissions("permissionsList")
    public ModelAndView permissionsList(HttpServletRequest request) {
        ModelAndView mv = new ModelAndView();

        PermissionsForm form = new PermissionsForm();
        if (!StringUtils.isEmpty(request.getParameter("id")))
            form.setId(Integer.parseInt(request.getParameter("id")));
        if (!StringUtils.isEmpty(request.getParameter("name")))
            form.setName(request.getParameter("name"));
        if (!StringUtils.isEmpty(request.getParameter("group")))
            form.setGroup(request.getParameter("group"));

        List<Permissions> menuList = permissionsService.getList(form);

        mv.addObject("menuList", menuList);
        mv.addObject("id", request.getParameter("id"));
        mv.addObject("name", request.getParameter("name"));
        mv.addObject("group", request.getParameter("group"));
        mv.setViewName("views/admin/system_manage/permissions_list");
        return mv;
    }

@RequiresPermissions("permissionsList") ： 表示拥有 permissionsList 权限方可访问该方法

附加：
　　实际使用访问到不具有权限的地址时会报错 org.apache.shiro.authz.UnauthorizedException 或者 org.apache.shiro.authz.UnauthenticatedException

　　此时需要在 spring-mvc.xml 里添加 错误跳转未授权页面

    <!-- shiro异常跳转 -->
    <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
        <property name="exceptionMappings">
            <props>
                <prop key="org.apache.shiro.authz.UnauthorizedException">no_permissions</prop>
                <prop key="org.apache.shiro.authz.UnauthenticatedException">no_permissions</prop>
            </props>
        </property>
    </bean> 

no_permissions 为 ModelAndView。 
完结。。。