在做网站开发中，用户权限必须要考虑的，权限这个东西很重要，它规定了用户在使用中能进行哪 些操作，和不能进行哪些操作；我们完全可以使用过滤器来进行权限的操作，但是有了权限框架之后，使用起来会非常的方便，一般在公司里面做网站开发常用的权 限框架有Spring的Security框架，和Apache的Shiro框架；Spring Security框架在使用上相比Shiro来说要更复杂一些，并且它限制了数据库该怎么去建表，只有按它的要求去建表，才能达到你想要的效果。下面我主 要介绍一下Shiro框架的使用，由于本人也是初学者，所写难免会有些不合理的地方，望各位指正；
使用Apache Shiro框架的步骤：
1.导入相应的jar包，我使用的是maven来管理的，pom.xml配置如下：
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.kaishengit</groupId> <artifactId>springmvctest</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>springmvctest Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>3.2.4.RELEASE</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.10</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>3.2.4.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>3.2.4.RELEASE</version> </dependency> <!-- Hibernate --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>4.2.5.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-ehcache</artifactId> <version>4.2.5.Final</version> </dependency> <dependency> <groupId>net.sf.ehcache</groupId> <artifactId>ehcache</artifactId> <version>2.7.2</version> </dependency> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.26</version> </dependency> <dependency> <groupId>javax.inject</groupId> <artifactId>javax.inject</artifactId> <version>1</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>5.0.1.Final</version> </dependency> <!--Apache Shiro所需的jar包--> <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-core</artifactId> <version>1.2.2</version> </dependency> <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-web</artifactId> <version>1.2.2</version> </dependency> <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-spring</artifactId> <version>1.2.2</version> </dependency> </dependencies> <build> <finalName>springmvctest</finalName> <plugins> <plugin> <groupId>org.mortbay.jetty</groupId> <artifactId>jetty-maven-plugin</artifactId> <configuration> <scanIntervalSeconds>10</scanIntervalSeconds> <webApp> <contextPath>/</contextPath> </webApp> <connectors> <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector"> <port>80</port> <maxIdleTime>60000</maxIdleTime> </connector> </connectors> </configuration> </plugin> </plugins> </build> </project>
2.在web.xml中进行配置：
<?xml version="1.0"encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <display-name>Archetype Created Web Application</display-name> <!-- OpenSessionInView --> <filter> <filter-name>opensessioninview</filter-name> <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class> </filter> <filter-mapping> <filter-name>opensessioninview</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- SpringMVC中央控制器 --> <servlet> <servlet-name>mvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>mvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- Spring监听器 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- Shiro配置 --> <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> </web-app>
3.使用SpringMVC：在/WEB-INF/路径下配置springmvc-servlet.xml
<?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:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <!-- 自动扫描 --> <context:component-scan base-package="com.kaishengit.controller"> <context:include-filter type="annotation"expression="org.springframework.stereotype.Controller"/> </context:component-scan> <mvc:annotation-driven/> <!-- 静态资源访问 --> <mvc:resources location="/static/"mapping="/static/**"/> <!-- 视图解析器 --> <bean id="viewResolver"class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass"value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix"value="/WEB-INF/views/"/> <property name="suffix"value=".jsp"/> </bean> <!-- 文件上传解析器 --> <bean id="multipartResolver"class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 配置最大上传文件的大小 --> <property name="maxUploadSize"value="1000000"/> </bean> <!-- 拦截器 --> <mvc:interceptors> <mvc:interceptor> <mvc:mapping path="/**"/> <bean class="com.kaishengit.controller.MyInterceptor"> <property name="excluedUrls"> <list> <value>/home</value> </list> </property> </bean> </mvc:interceptor> </mvc:interceptors> <!-- 异常 --> <bean id="handlerExceptionResolver"class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <property name="exceptionMappings"> <props> <prop key="com.kaishengit.exception.AuthorizationException">redirect:/home</prop> </props> </property> </bean> </beans>
4.配置applicationContext.xml
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 自动扫描所有的注解，排除掉controller不扫描 -->
<context:component-scan base-package="com.kaishengit">
<context:exclude-filter type="annotation"expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 加载ClassPath中的properties文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 基于Hibernate的事务管理器 -->
<bean id="transactionManager"class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory"ref="sessionFactory"></property>
</bean>
<!-- 配置数据源 -->
<bean id="dataSource"class="org.apache.commons.dbcp.BasicDataSource"destroy-method="close">
<property name="driverClassName"value="${jdbc.driver}"/>
<property name="url"value="${jdbc.url}"/>
<property name="username"value="${jdbc.username}"/>
<property name="password"value="${jdbc.password}"/>
</bean>
<!-- 基于注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
<!-- SessionFactory -->
<bean id="sessionFactory"class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource"ref="dataSource"/>
<!-- 实体类pojo所在的包 -->
<property name="packagesToScan"value="com.kaishengit.pojo"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
</props>
</property>
</bean>
</beans>
5.将配置在applicationContext.xml中的shiro独立出来，新建applicationContext-shiro.xml
<?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" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <bean id="securityManager"class="org.apache.shiro.web.mgt.DefaultWebSecurityManager"> <property name="realm"ref="myShiro"/> <property name="cacheManager"ref="cacheManager"/> </bean> <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"/> <property name="unauthorizedUrl"value="/403"/> <property name="filterChainDefinitions"> <value> <!--静态资源直接通过--> /static/** =anon <!--只有admin角色才能访问/user/save--> /user/save =roles[admin] <!--具有user:add权限的用户可以访问/user/save--> <!--/user/save =perms[user:add]--> <!--所有的请求都要通过验证--> /** = authc </value> </property> </bean> <bean id="cacheManager" class="org.apache.shiro.cache.MemoryConstrainedCacheManager"/> <bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/> </beans>
6.实现MyRealm:继承AuthorizingRealm,并重写认证授权方法
package com.kaishengit.service;
import java.util.List;
import javax.inject.Inject;
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.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.kaishengit.pojo.Role;
import com.kaishengit.pojo.User;
@Service
@Transactional
public class MyRealm extends AuthorizingRealm{
@Inject
private UserService userService;
/**
* 权限认证
*/
@Override
protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
//获取登录的用户名
String loginName=(String) principalCollection.fromRealm(getName()).iterator().next();
User user=userService.findByName(loginName);
if(user!=null){
SimpleAuthorizationInfo info=new SimpleAuthorizationInfo();
//登录的用户有多少个角色
info.setRoles(user.getRolesName());
List<Role> roleList=user.getRoleList();
for(Role role:roleList){
//角色有多少个权限
info.addStringPermissions(role.getPermissionNames());
}
return info;
}
return null;
}
/**
* 登录认证
*/
@Override
protected AuthenticationInfo doGetAuthenticationInfo(
AuthenticationToken authenticationToken) throws AuthenticationException {
UsernamePasswordToken token = (UsernamePasswordToken) authenticationToken;
User user = userService.findByName(token.getUsername());
if(user != null) {
return new SimpleAuthenticationInfo(user.getUsername(), user.getPassword(), getName());
}
return null;
}
}
7.HomeController.java
package com.kaishengit.controller;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import com.kaishengit.pojo.User;
@Controller
public class HomeController {
@RequestMapping(value="/login",method=RequestMethod.GET)
public String loginForm(){
return"/login";
}
@RequestMapping(value="/login",method=RequestMethod.POST)
public String login(User user,RedirectAttributes redirectAttributes){
try {
SecurityUtils.getSubject().login(new UsernamePasswordToken(user.getUsername(), user.getPassword()));
return"redirect:/user";
} catch (AuthenticationException e) {
redirectAttributes.addFlashAttribute("message","用户名或密码错误");
return"redirect:/login";
}
}
@RequestMapping(value="/logout",method=RequestMethod.GET)
public String logout(RedirectAttributes redirectAttributes ){
SecurityUtils.getSubject().logout();
redirectAttributes.addFlashAttribute("message","您已安全退出");
return"redirect:/login";
}
}
8.在jsp中使用Shiro标签库：
<%@ taglib prefix="shiro"uri="http://shiro.apache.org/tags"%>
<html>
<head>
<title>page</title>
</head>
<body>
<!--显示登录的用户名-->
<h2>welcome!<shiro:principal/></h2>
<a href="/logout">安全退出</a>
<!--角色为manager的用户登录后会显示添加按钮，否则不显示-->
<shiro:hasRole name="manager">
<a href="/user/save">添加</a>
</shiro:hasRole>
</body>
</html>
9.数据库中建表，E-R图如下：
