Shiro+SSM整合，认证授权

小灰灰 2022-05-24 02:22 456阅读 0赞

** 环境 : **

Shiro+SSM整合基于你已经拥有一个可运行的SSM+Maven环境。

**   主体 :**

**   ** 1. 导入shiro相关jar包

2. web.xml配置shiro的代理过滤器，shiro的入口，相当于建立起servlet与shiro的联系

3. 配置shiro的xml文件

4. 自定义 Realm，获取数据库安全数据

5. controller层调用shiro的login方法验证用户信息

**    步骤 :**

**    1.** pom.xml导入相关jar包

<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>

2. 配置web.xml

这个地方只需要在web.xml中添加如下配置

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

filter-name  默认是shiroFilter,要修改的话可以在这个地方配置，为了改个名字添加额外配置，个人感觉这个很鸡肋，不做介绍。

3. 定制自己的shiro服务，我这里命名spring-shiro.xml

要注意的是文件名和web.xml中配置的文件名保持一致。

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans   
                            http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"
    	default-lazy-init="true">
    
    	
    	<bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
    		<property name="realm" ref="myShiroRealm" />
    		<property name="cacheManager" ref="cacheManager" />
    		
    	</bean>
    	
    	
    	<bean id="myShiroRealm" class="com.hans.shiro.UserRealm">
    		
    		<property name="cacheManager" ref="cacheManager" />
    		
    		<property name="credentialsMatcher">
                <bean class="org.apache.shiro.authc.credential.HashedCredentialsMatcher">
                    <property name="hashAlgorithmName" value="MD5"></property> 
                    <property name="hashIterations" value="1024"></property> 
                </bean>
            </property>
    	</bean>
    
    	
    	<bean id="cacheManager" class="org.apache.shiro.cache.MemoryConstrainedCacheManager" />
    
    	
    	
    	<bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor" />
    
    	
    	<bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
    		<property name="securityManager" ref="securityManager" />
    		<property name="loginUrl" value="/logon.jsp" />
    		<property name="successUrl" value="/index.jsp" />
    		<property name="unauthorizedUrl" value="/unauthorized.jsp" />
    		
    		
    		<property name="filterChainDefinitions">
    			<value>
    				/logon.jsp = anon
    				/user/logon = anon
    				/index.jsp = authc
    				/admin/** = roles[admin]
    				/user/** = roles[user]
                    /logout=logout
    				/** = authc
    			</value>
    		</property>
    	</bean>
    
    </beans>

配置中介绍的比较详细，不涉及的知识点有多Realm配置及认证策略，以上的配置属于单个Realm的AtLeastOneSuccessfulStrategy认证策略(有一个成功就登录成功)。

还有URL匹配优先级问题，简单描述就是从上到下依次匹配，以第一次匹配到的为准。这个很好理解，举个例子，/logon.jsp = anon 这个表达式的意思是根目录下的logon.jsp可以匿名访问，/\*\* = authc 这个表达式表示所有的资源都需要认证过后才能访问，很明显/\*\*包括/logon.jsp，而实际上我们访问logon.jsp是可以匿名访问的，原因就是URL匹配优先级以第一次匹配到的规则为准。

4. 自定义 Realm

package com.hans.shiro;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.HashSet;
    import java.util.List;
    import java.util.Map;
    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.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.apache.shiro.util.ByteSource;
    import org.springframework.beans.factory.annotation.Autowired;
    
    import com.hans.entity.User;
    import com.hans.service.UserService;
    
    /**
     * @todo 自定义 Realm,查询数据库并返回正确的数据
     * @author Hans
     * @time 2018下午6:11:20
     *
     */
    public class UserRealm extends AuthorizingRealm{
    	
    	@Autowired
    	private UserService userSer;
    
    	@Autowired
    	private User us;
    
    	/**
    	 * @see 授权，在配有缓存的情况下，只加载一次。
    	 */
    	@Override
    	protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principal) {
    		//当前登录用户，账号
    		String userCode = principal.toString();
    		System.out.println("当前登录用户:"+userCode);
    		//获取角色信息
    		List<Map<String, Object>> roleList = new ArrayList<Map<String, Object>>();
    		roleList = userSer.findRoles(userCode);
    		Set<String> roles = new HashSet<String>();
    		
    		if(roleList.size()>0){
    			for(Map<String, Object> role : roleList){
    				roles.add(String.valueOf(role.get("rcode")));
    			}
    		}else{
    			System.out.println("当前用户没有角色！");
    		}
    		
    		SimpleAuthorizationInfo info = null;
    		info = new SimpleAuthorizationInfo(roles);
    		return info;
    	}
    	
    	/**
    	 * @see 认证登录，查询数据库，如果该用户名正确，得到正确的数据，并返回正确的数据
    	 * 		AuthenticationInfo的实现类SimpleAuthenticationInfo保存正确的用户信息
    	 *    
    	 */
    	@Override
    	protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
    		//1.将token转换为UsernamePasswordToken
    		UsernamePasswordToken userToken = (UsernamePasswordToken)token;
    		//2.获取token中的登录账户
    		String userCode = userToken.getUsername();
    		//3.查询数据库，是否存在指定的用户名和密码的用户(主键/账户/密码/账户状态/盐)
    		us = null;
    		us = userSer.findUserByUserCode(userCode);
    		//4.1 如果没有查询到，抛出异常
    		if( us == null ) {
    			throw new UnknownAccountException("账户"+userCode+"不存在！");
    		}
    		if( us.getStatus() == 0){
    			throw new LockedAccountException(us.getUsercode()+"被锁定！");
    		}
    		//4.2 如果查询到了，封装查询结果，
    		Object principal = us.getUsercode();
    		Object credentials = us.getPassword();
    		String realmName = this.getName();
    		String salt = us.getSalt();
    		//获取盐，用于对密码在加密算法(MD5)的基础上二次加密ֵ
    		ByteSource byteSalt = ByteSource.Util.bytes(salt);
    		SimpleAuthenticationInfo info = new SimpleAuthenticationInfo(principal, credentials, byteSalt, realmName);
    		//5. 返回给调用login(token)方法
    		return info;
    	}
    
    }

5. controller层验证用户信息

package com.hans.controller;
    
    import org.apache.shiro.SecurityUtils;
    import org.apache.shiro.authc.UsernamePasswordToken;
    import org.apache.shiro.subject.Subject;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.security.core.AuthenticationException;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RequestParam;
    
    import com.hans.entity.User;
    import com.hans.service.UserService;
    
    /**
     * @todo 
     * @author Hans
     * @time 2018下午6:34:04
     *
     */
    @Controller
    @RequestMapping("user")
    public class UserController {
    	@Autowired
    	UserService userSer;
    	@Autowired
    	User user;
    	/**
    	 * @todo 用户登录
    	 * @since 获取当前用户，
    	 * 判断用户是否已经认证登录，
    	 * 用账号密码创建UsernamePasswordToken，
    	 * 调用subject的login方法
    	 * @param
    	 * @return
    	 */
    	@RequestMapping(method = RequestMethod.POST,value = "logon")
    	public String logon(@RequestParam("userCode")String userCode,@RequestParam("password")String password){
    		//创建Subject实例对象
    		Subject currentUser = SecurityUtils.getSubject();
    		//判断当前用户是否已登录
    		if(currentUser.isAuthenticated() == false){
    			UsernamePasswordToken token = new UsernamePasswordToken(userCode,password);
    			try {
    				currentUser.login(token);
    			} catch (AuthenticationException e) {
    				e.getMessage();
    				e.printStackTrace();
    				System.out.println("登录失败");
    				return "logon";
    			}
    		}
    		return "index";
    	}
    }

配置完成，到这里就可以实现简单的登录授权功能。

下面看看效果，用户登录。

![70][]

![70 1][]

点击管理员资源，跳转拦截

![70 2][]

点击用户资源，跳转

![70 3][]

[70]: /images/20220524/02af5f39c3c140aaa0aef2e0239f8971.png
[70 1]: /images/20220524/e1c505d2c44d4e19840940ededa01d9a.png
[70 2]: /images/20220524/d8f92e87eec34a1ba021413a0c690ebe.png
[70 3]: /images/20220524/83c8bc545cd640939c582b38a14d8bc4.png