springboot引入shiro实现拦截，权限，认证，授权功能

        <!--        shiro依赖-->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>1.4.1</version>
        </dependency>

package shiro.demo.config;

import at.pollux.thymeleaf.shiro.dialect.ShiroDialect;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import sun.net.www.protocol.http.AuthCache;

import javax.swing.*;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * @author Vijay
 * @date 2020/3/29  -10:22
 */
@Configuration
public class ShiroConfig {
   //创建ShiroFilterFactoryBean  工厂bean
    @Bean
    public ShiroFilterFactoryBean shiroFilterFactoryBean(@Qualifier("getDefaultWebSecurityManager")DefaultWebSecurityManager getDefaultWebSecurityManager)
    {

        ShiroFilterFactoryBean bean = new ShiroFilterFactoryBean();
        //set
        bean.setSecurityManager(getDefaultWebSecurityManager);
        //bean的内置过滤器
    //        anon:无需认证就可以访问
   //        authc :必须要认证才能访问
   //        user:必须拥有记住我才有用
   //        perms：拥有某个资源的权限才能用
   //        role：拥有对某个角色的权限才能访问
        Map<String, String> map=new LinkedHashMap<>();
        //授权
        map.put("/user/add","perms[user:add]");
        map.put("/user/update","perms[user:update]");
        bean.setFilterChainDefinitionMap(map);
        bean.setLoginUrl("/toLogin");
        bean.setUnauthorizedUrl("/unauth");
        return  bean;
    }

    //创建DefaultWebSecurityManager   管理对象
    @Bean
   public DefaultWebSecurityManager getDefaultWebSecurityManager(@Qualifier("userRealm") UserRealm userRealm)
   {
       DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
       //set
        securityManager.setRealm(userRealm);
       return securityManager;
   }
    //创建realm对象
    @Bean
    public UserRealm userRealm()
    {
        return new UserRealm();
    }

    //用ShiroDialect来整合 shiro和thymeleaf
    @Bean
    public ShiroDialect shiroDialect()
    {
        return  new ShiroDialect();
    }
}

package shiro.demo.config;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import org.apache.catalina.security.SecurityUtil;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
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.subject.Subject;
import org.springframework.beans.factory.annotation.Autowired;
import shiro.demo.entity.User;
import shiro.demo.service.UserService;

/**
 * @author Vijay
 * @date 2020/3/29  -10:42
 */
public class UserRealm  extends AuthorizingRealm {
    @Autowired
    private UserService userService;

   //认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        System.out.println("执行了认证操作");
        //连接数据库
        UsernamePasswordToken userToken= (UsernamePasswordToken) token;
        QueryWrapper<User> wrapper = new QueryWrapper<>();
        wrapper.eq("username",userToken.getUsername());
        User user = userService.getOne(wrapper);
       //用户名认证
        if (user==null) {
            return  null;
        }
        //密码认证
      return    new SimpleAuthenticationInfo(user,user.getPassword(),"");

    }
    //授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("执行了授权操作");
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
        //连接数据库，获取权限
        Subject subject = SecurityUtils.getSubject();
        User user = (User) subject.getPrincipal();
        info.addStringPermission(user.getPersm());
        return info;
    }


}