<!--        后臺(tái)攔截-->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>1.4.0</version>
        </dependency>

@Bean
public ShiroFilterFactoryBean getShiroFilterFactoryBean(@Qualifier(SecurityManager) DefaultWebSecurityManager securityManager){
   	ShiroFilterFactiryBean bean = new ShiroFilterFactoryBean()
	//關(guān)聯(lián)SecurityManager設(shè)置安全管理器	
 	bean.setSecurityManager(securityManager)
    
	//添加內(nèi)置過(guò)濾器
        /*
        	anon:無(wú)需過(guò)濾就可以訪問(wèn)
            authc：必須認(rèn)證了才可訪問(wèn)(登錄后才可訪問(wèn))
            user：必須擁有"記住我"功能才可訪問(wèn)
            perms：擁有對(duì)某個(gè)資源的權(quán)限才可以訪問(wèn)
            role：擁有某個(gè)角色權(quán)限才可訪問(wèn)
        */
  	Map<String,String> filterMap = new LinkedHashMap<>();
    //攔截 
    //filterMap.put("頁(yè)面地址","內(nèi)置過(guò)濾器")
	//filterMap.put("/user/name","anon")
	//filterMap.put("/user/book","authc")
    
	//具有user:add權(quán)限時(shí)才可以訪問(wèn)/user/name
    //perms中的“user:add”與數(shù)據(jù)庫(kù)中對(duì)應(yīng)權(quán)限要一致
    filterMap.put("/user/name","perms[user:add]")
    
	//授權(quán)，正常情況下，沒(méi)有授權(quán)會(huì)跳轉(zhuǎn)到未授權(quán)頁(yè)面
 	bean.setUnauthorizedUrl("未授權(quán)時(shí)跳轉(zhuǎn)的頁(yè)面")  
        
  	//創(chuàng)建一個(gè)過(guò)濾器鏈(其中內(nèi)容通過(guò)Map存儲(chǔ))
 	bean.setFilterChainDefinitionMap(FilterMap); 
    //設(shè)置登錄請(qǐng)求(登錄的地址添加，當(dāng)使用"authc"時(shí)，如果未登錄，則跳轉(zhuǎn)到登錄頁(yè)面)
    bean.setLoginUrl("/login")
	return bean;
}

//@Qualifier:引入bena對(duì)象
@Bean(name="SecurityManager")
public DefaultWebSecurityManager getDefaultWebSecurityManager(@Qualifier("MyRealm") MyRealm myRealm){
    DefaultWebSecurityManager securityManager = new DefaultWebSecurotyManager();
    //關(guān)聯(lián)MyRealm
    securityManager.setRealm(myRealm);
    return securityManager;
}

//將自定義的realm對(duì)象交給spring
//@Bean(name="MyRealm")中name屬性不加默認(rèn)名稱為方法名
@Bean(name="MyRealm")
public MyRealm MyRealm(){
 	return new MyRealm();
}

class MyRealm extends AuthorizingRealm

project AthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals){
    //1、權(quán)限信息對(duì)象info,用來(lái)存放查出的用戶的所有的角色（role）及權(quán)限（permission）
 	SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
    //2、拿到當(dāng)前登錄的對(duì)象信息，通過(guò)認(rèn)證方法SimpleAuthenticationInfo（第一個(gè)參數(shù)）已經(jīng)進(jìn)行存入 
    User user =（user）SecurityUtils.getSubject().getPrincipal();
    //3、將該對(duì)象的角色信息進(jìn)行存入
    // 賦予角色
	List<Role> roleList = roleService.listRolesByUserId(userId);
	for (Role role : roleList) {
		info.addRole(role.getName());
	}
    //4、設(shè)置該用戶的權(quán)限
    infO.addStringPermission(user.getPerms())
    //5、將該對(duì)象的權(quán)限信息進(jìn)行存入（permissionSet一個(gè)權(quán)限信息的集合）
    info.setStringPermissions(permissionSet);
    return info;
}

project AuthenticationInfo doGetAuthorizationInfo(AuthenticationToken token){
    //1、拿到用戶登陸的信息
    UsernamePasswordToken userToken =(UsernamePasswordToken) token;
    //2、通過(guò)用戶名（userToken.getUsername）獲取數(shù)據(jù)庫(kù)中的對(duì)象user
    //如果獲取對(duì)象user為空則該用戶不從在，返回return null（拋出用戶不存在異常）
    if (user == null) {
            throw new UnknownAccountException("賬號(hào)不存在！");
        	//或直接 return null;
        }
    //3、密碼認(rèn)證，有shiro完成(AuthenticationInfo是一個(gè)接口，SimpleAuthenticationInfo是其接口的實(shí)現(xiàn)類)
    //也可對(duì)密碼進(jìn)行加密 如MD5 MD5鹽值
    return new SimpleAuthenticationInfo("用戶對(duì)象信息（user）","通過(guò)用戶從數(shù)據(jù)庫(kù)中獲得的用戶密碼（user.password）","")
}

//獲取當(dāng)前用戶
Subject subject = SecurityUtils.getSubject();
//封裝用戶的登錄數(shù)據(jù)(username:用戶登陸時(shí)傳入的賬號(hào)；password：用戶登陸時(shí)傳入的密碼)
UsernamePasswordToken token = new UsernamePasswordToken(username,password);
//執(zhí)行登錄(如果有異常則登錄失敗，沒(méi)有異常則登錄成功，在Shiro中已經(jīng)為我們封裝了登錄相關(guān)的異常，直接使用即可)
try{
    subject.login(token);//執(zhí)行登錄成功后
    return "首頁(yè)"
}catch(UnknowAccountException e){//用戶名不存在
    return "login"
}catch(IncorrectCredentialsException e){//密碼不存在
    return "login"
}
注意：該方法中登錄失敗后返回的是跳轉(zhuǎn)的頁(yè)面，故不可用@ResponseBody

package com.lingmeng.shiro;
 
import com.lingmeng.pojo.entity.Admin;
import com.lingmeng.pojo.entity.Permission;
import com.lingmeng.pojo.entity.Role;
import com.lingmeng.pojo.resp.BaseResp;
import com.lingmeng.service.AdminService;
import com.lingmeng.service.RoleService;
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 java.util.HashSet;
import java.util.Set;
 
public class MyRealm extends AuthorizingRealm {
 
    @Autowired
    RoleService roleService;
 
    @Autowired
    AdminService adminService;
 
    //授權(quán)
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
        //獲取用戶信息
        Subject subject = SecurityUtils.getSubject();
        Admin admin =(Admin) subject.getPrincipal();
        //獲取用戶的權(quán)限及角色信息
        BaseResp baseResp = roleService.selectOne(admin.getUsername());
        Role role = (Role) baseResp.getData();
        //將獲取的角色及權(quán)限進(jìn)行存入
        if (role!=null){
            //角色存入
            info.addRole(role.getName());
            //權(quán)限信息進(jìn)行存入
            Set<String> perms = new HashSet<>();
            for (Permission perm : role.getPerms()) {
                perms.add(perm.getUrl());
            }
            info.setStringPermissions(perms);
        }
        return info;
    }
 
    //認(rèn)證
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        //獲取登錄信息(登錄的賬號(hào))
        String username =(String)authenticationToken.getPrincipal();
//      UsernamePasswordToken userToken =(UsernamePasswordToken) authenticationToken;拿到登錄時(shí)傳入的賬號(hào)和密碼對(duì)象
        //從數(shù)據(jù)庫(kù)中查詢?cè)搶?duì)象的信息
        Admin admin = adminService.selectOne(username);
        if (admin==null){
            throw new UnknownAccountException("賬號(hào)不存在");
        }
        return new SimpleAuthenticationInfo(admin,admin.getPassword(),this.getName());
    }
}

package com.lingmeng.controller;
 
import com.lingmeng.pojo.entity.Admin;
import com.lingmeng.pojo.resp.BaseResp;
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.web.bind.annotation.*;
 
@RestController
public class AdminController {
 
    @PostMapping("background/login")
    public BaseResp  login(@RequestBody Admin admin){
        Subject subject = SecurityUtils.getSubject();
        UsernamePasswordToken token = new UsernamePasswordToken(admin.getUsername(), admin.getPassword());
        try{
            subject.login(token);
            return BaseResp.SUCCESS("登錄成功",null,null);
        }catch (UnknownAccountException e){//賬號(hào)不存在
            return BaseResp.FAIL(201,"賬號(hào)不存在");
        }catch(IncorrectCredentialsException incorrectCredentialsException){//密碼錯(cuò)誤
            return BaseResp.FAIL(201,"密碼錯(cuò)誤") ;
        }
    }
 
    @GetMapping("/background/exitLogin")
    public BaseResp exitLogin(){
        Subject subject = SecurityUtils.getSubject();
        System.out.println(subject.getPrincipal());
        try{
            subject.logout();//退出登錄
            return BaseResp.SUCCESS("退出登錄",null,null);
        }catch(Exception e){
            return BaseResp.FAIL(202,"退出失敗");
        }
    }
}

package com.lingmeng.config;
 
import com.lingmeng.shiro.MyRealm;
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;
@Configuration
public class ShiroConfig {
 
    @Bean
    public ShiroFilterFactoryBean shiroFilterFactoryBean(@Qualifier("securityManager") DefaultWebSecurityManager securityManager){
        ShiroFilterFactoryBean bean = new ShiroFilterFactoryBean();
        bean.setSecurityManager(securityManager);
        //配置請(qǐng)求攔截并存入map中
         /*
        	anon:無(wú)需過(guò)濾就可以訪問(wèn)
            authc：必須認(rèn)證了才可訪問(wèn)(登錄后才可訪問(wèn))
            user：必須擁有"記住我"功能才可訪問(wèn)
            perms：擁有對(duì)某個(gè)資源的權(quán)限才可以訪問(wèn)
            role：擁有某個(gè)角色權(quán)限才可訪問(wèn)
        */
        Map<String, String> map = new LinkedHashMap<>();
        map.put("/background/**","authc");
        map.put("background/login","anon");
 
 
        bean.setFilterChainDefinitionMap(map);
        //設(shè)置未授權(quán)跳轉(zhuǎn)地址
        bean.setUnauthorizedUrl("");
        //設(shè)置登錄地址
        bean.setLoginUrl("/background/login");
        return bean;
    }
 
    @Bean("securityManager")
    public DefaultWebSecurityManager defaultWebSecurityManager(@Qualifier("myRealm") MyRealm myRealm){
        return new DefaultWebSecurityManager(myRealm);
    }
 
    @Bean()
    public MyRealm myRealm(){
        return new MyRealm();
    }
}