第一次使用shiro就感觉用户验证很厉害的样子

使用前需要导入 shiro-spring

        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>1.7.1</version>
        </dependency>

      <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

首先创建配置类

一般开发我们会把配置单独放在config文件夹

在权限控制中比较重要的验证（登录或权限）逻辑，都是在Realm中做的。实现需要注意的是，在 Shiro 实际使用中，我们是肯定会自定义一个 Realm 类 继承AuthorizingRealm 并重写两个方法

package com.likefr.config;

import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;

/**
 * @version 1.0 2021/4/6
 * @outhor Likefr
 */

public class UserRealm extends AuthorizingRealm {
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
       System.out.print("执行了=>授权doGetAuthorizationInfo");
        return null;
    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
String username="admin";
String password="123456";
        UsernamePasswordToken userToken=(UsernamePasswordToken) token;
        if(!userToken.getUsername().equals(username)){
            return null;
        }
        System.out.print("执行了=>认证doGetAuthorizationInfo");
        return new SimpleAuthenticationInfo("",password,"");
    }
}

package com.likefr.config;

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 java.util.LinkedHashMap;
import java.util.Map;

/**
 * @version 1.0 2021/4/6
 * @outhor Likefr
 */
@Configuration
public class ShiroConfig {


    @Bean//1
    public ShiroFilterFactoryBean getShiroFilterFactoryBean(@Qualifier("SecurityManager") DefaultWebSecurityManager defaultWebSecurityManager) {
        ShiroFilterFactoryBean bean = new ShiroFilterFactoryBean();
        bean.setSecurityManager(defaultWebSecurityManager);
        Map<String, String> filterMap = new LinkedHashMap<>();
        // filterMap.put("/user/add","authc");
       // filterMap.put("/user/update", "authc");
        filterMap.put("/user/*", "authc");
        bean.setFilterChainDefinitionMap(filterMap);
        bean.setLoginUrl("/toLogin"); //跳转 登录页面
        return bean;
    }

    @Bean(name = "SecurityManager") //2
    public DefaultWebSecurityManager getDefaultWebSecurityManager(@Qualifier("userRealm") UserRealm userRealm) {//3
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        securityManager.setRealm(userRealm);
        return securityManager;
    }

    @Bean  //1
    public UserRealm userRealm() {
        return new UserRealm();
    }
}

接下来就是controller 啦

package com.likefr.controller;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.IncorrectCredentialsException;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * @version 1.0 2021/4/6
 * @outhor Likefr
 */

@Controller
public class ShiroController {
    @GetMapping("/index")
    public String index(Model model){
        model.addAttribute("msg","Likefr Hello world");
        return "index";
    }

    @RequestMapping("/user/add")
    public String add(){
        return "user/add";
    }

    @RequestMapping("/user/update")
    public String update(){
        return "user/update";
    }

    @RequestMapping("/toLogin")
    public String toLogin(){
        return "login";
    }

    @RequestMapping("/login")
    public String login(String username,String password,Model model){
        Subject subject= SecurityUtils.getSubject();
        UsernamePasswordToken token = new UsernamePasswordToken(username, password);
        try {
            subject.login(token);
            return "index";
        }catch (UnknownAccountException e) {
            model.addAttribute("msg", "用户名错误");
            return "login";
        }catch (IncorrectCredentialsException e){
            model.addAttribute("msg", "密码错误");
            return "login";
        }
    }
}