RBAC基本思想是，对系统操作的各种权限不是直接授予具体的用户，而是在用户集合与权限集合之间建立一个角色集合。每一种角色对应一组相应的权限。一旦用户被分配了适当的角色后，该用户就拥有此角色的所有操作权限。这样做的好处是，不必在每次创建用户时都进行分配权限的操作，只要分配用户相应的角色即可，而且角色的权限变更比用户的权限变更要少得多，这样将简化用户的权限管理，减少系统的开销。

实现方式

Springboot+AOP切面+自定义注解+redis+jwt+mybatis+token拦截器

注：为了简化操作和流程，没有真正地从mysql中读取数据，而是以写死的数据进行演示

一图流实现思路

代码实现

导入相关依赖


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.12</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.8.9</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjtools -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjtools</artifactId>
            <version>1.8.9</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.7.4</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <!--hutool-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.7.17</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.62</version>
        </dependency>
        <!--hutool-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.7.17</version>
        </dependency>

实现登录与用户的token携带

编写登录controller接口


package com.melody.rest.restcontroller;
 
import com.melody.rest.domain.RestSysUser;
import com.melody.rest.model.ResultJson;
import com.melody.rest.service.RestAuthService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
@RequestMapping("/rest")
public class LoginController {
 
    @Autowired
    private RestAuthService restAuthService;
 
 
    //登录
    @PostMapping("/login")
    public ResultJson index(@RequestBody RestSysUser restSysUser){
        //登录以及登录成功存入token
        return restAuthService.Login(restSysUser);
    }
 
}

编写登录service业务


package com.melody.rest.service;
 
 
import com.melody.rest.domain.RestSysUser;
import com.melody.rest.model.ResultJson;
 
public interface RestAuthService {
 
    //登录方法
    ResultJson Login(RestSysUser restSysUser);
    
 
}

实现登录业务

在业务中判断账号密码的正确性，并将用户账户、密码、token存入redis，设置token一天有效期


package com.melody.rest.service.impl;
 
 
import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import com.melody.rest.domain.RestSysUser;
import com.melody.rest.model.ResultCode;
import com.melody.rest.model.ResultJson;
import com.melody.rest.service.RestAuthService;
import com.melody.rest.util.ResourceVerification;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
 
 
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
 
 
@Service
public class RestAuthServiceImpl implements RestAuthService {
 
    @Autowired
    RedisTemplate redisTemplate;
 
 
    @Override
    public ResultJson Login(RestSysUser restSysUser) {
        //账号密码校验，
        if("admin".equals(restSysUser.getUsername()) && "123456".equals(restSysUser.getPassword())){
            //账号密码正确
            restSysUser.setResources(ResourceVerification.resource());//向用户权限中注入写死的权限
            Map<String, Object> userMap = BeanUtil.beanToMap(restSysUser, new HashMap<>(),
                    CopyOptions.create()
                            .setIgnoreNullValue(true)//忽略一些空值
                            .setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));
            UUID uuid = UUID.randomUUID();
            String tokenKey= String.valueOf(uuid);
            String token="LoginUserKey "+tokenKey;
            //存储
            redisTemplate.opsForHash().putAll(token,userMap);
            //设置存值时间，expire默认秒，改为天数，设置1天
            redisTemplate.expire(token,1, TimeUnit.DAYS);
            return ResultJson.ok(token);
        }else{
            //账号密码不正确
            return ResultJson.failure(ResultCode.LOGIN_ERROR);
        }
    }
}

测试用的权限：

实现登录后操作的权限验证

实现token拦截器，对所有操作进行身份验证

拦截器不受spring管理，因此需要在拦截器中注入redis模板类RedisTemplate，使用有参构造将RedisTemplate传递给token拦截类


package com.melody.rest.config;
 
import com.melody.rest.util.LoginInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 
import javax.annotation.Resource;
 
@Configuration
public class MvcConfig implements WebMvcConfigurer {
 
    @Resource
    RedisTemplate redisTemplate;
 
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
 
        //配置登录查看是否有token拦截器
        registry.addInterceptor(new LoginInterceptor(redisTemplate)).addPathPatterns("/testRest/**").order(0);
 
    }
}


package com.melody.rest.util;
 
 
import cn.hutool.core.bean.BeanUtil;
import com.alibaba.fastjson.JSONObject;
import com.melody.rest.domain.RestData;
import com.melody.rest.domain.RestSysUser;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;
 
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
 
public class LoginInterceptor implements HandlerInterceptor {
 
    private RedisTemplate redisTemplate;
 
    public LoginInterceptor(RedisTemplate redisTemplate){
        this.redisTemplate=redisTemplate;
    }
 
 
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
 
        //设置编码
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/json;charset=utf-8");
 
        //1、判断是否携带token
        String token = request.getHeader("authorization");
        if(token==null || "".equals(token)){
            RestData restData = RestData.builder().code("401").msg("请先登录再操作！").build();
            String jsonRestData = JSONObject.toJSONString(restData);
            response.setStatus(401);
            response.getWriter().write(jsonRestData);
            return false;
        }
        Map<String, Object> userMap=redisTemplate.opsForHash().entries(token);
        RestSysUser restSysUser = BeanUtil.fillBeanWithMap(userMap, new RestSysUser(), false);
        //2、判断redis里面是否存在token
        if(userMap.isEmpty()){
            RestData restData = RestData.builder().code("401").msg("请先登录再操作！").build();
            String jsonRestData = JSONObject.toJSONString(restData);
            response.setStatus(401);
            response.getWriter().write(jsonRestData);
            return false;
        }
 
        return true;
    }
}

自定义注解，作为权限验证的切入点


package com.melody.rest.annotion;
 
import java.lang.annotation.*;
 
@Target({ ElementType.PARAMETER, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface AuthCheck {
 
    public String value() default "";
 
}

在切面中编写通知


package com.melody.rest.aspect;
 
 
import cn.hutool.core.bean.BeanUtil;
import com.melody.rest.annotion.AuthCheck;
import com.melody.rest.domain.RestSysUser;
import com.melody.rest.exception.AuthException;
import com.melody.rest.model.ResCode;
import com.melody.rest.model.ResJson;
import com.melody.rest.model.ResultCode;
import com.melody.rest.model.ResultJson;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
 
 
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.util.Map;
 
@Aspect
@Component
public class AuthAspect {
 
    @Value("${token.header}")
    private String header;
 
    @Autowired
    private HttpServletRequest request;
 
    @Resource
    private RedisTemplate redisTemplate;
 
    @Pointcut("@annotation(com.melody.rest.annotion.AuthCheck)")
    public void authPointCut(){
 
    }
 
 
    @Around("authPointCut()")
    public Object authCheck(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        try{
            // 判断 TOKEN
            String token = request.getHeader(header);
            System.err.println(token);
            Map<String, Object> userMap=redisTemplate.opsForHash().entries(token);
            RestSysUser restSysUser = BeanUtil.fillBeanWithMap(userMap, new RestSysUser(), false);
            if(restSysUser.getUsername() == null || restSysUser.getUsername().equals("")){
                throw new AuthException(ResCode.TOKEN_NOT_EXIST);
            } else {
                if(restSysUser.getResources()==null){
                    throw new AuthException(ResCode.BANED_REQUEST);
                }
                //从切面织入点处通过反射机制获取织入点处的方法
                MethodSignature signature = (MethodSignature) proceedingJoinPoint.getSignature();
                //获取切入点所在的方法
                Method method = signature.getMethod();
                AuthCheck ac = method.getAnnotation(AuthCheck.class);
//                System.err.println("=========================="+ac);
                boolean flag = false;
                if(ac != null) {
                    //获取切入点方法的value值，该测试接口设置的value为权限字段
                    String auth = ac.value();
//                    System.err.println("-----------------------------"+auth);
                    flag = restSysUser.getResources().stream().anyMatch(str -> str.equals(auth));
                    // way2:数据库中存放权限字段，根据注解的value确定请求所需权限判断是否有权限进行访问
                }
                if(!flag) {
                    return ResultJson.failure(ResultCode.FORBIDDEN);
                }
            }
        } catch(AuthException e) {
            System.err.println(e.getResCode().getCode() + ":" + e.getResCode().getMsg());
            return ResJson.no(e.getResCode());
        }
//        Object res = proceedingJoinPoint.proceed();
        return proceedingJoinPoint.proceed();
    }
 
}

编写测试接口，测试登录后的用户操作


package com.melody.rest.restcontroller;
 
import com.melody.rest.annotion.AuthCheck;
import com.melody.rest.model.ResultJson;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
 
 
@RestController
@RequestMapping("/testRest")
public class TestRestController {
 
 
 
    //测试方法1
    @AuthCheck("/testRest/t1")
    @PostMapping("/t1")
    public ResultJson test(){
        return ResultJson.ok("test1访问成功");
    }
 
    //测试方法2
    @AuthCheck("/testRest/t10")
    @PostMapping("/t10")
    public ResultJson test2(){
        return ResultJson.ok("test10访问");
    }
 
}

使用postman测试

登录测试

正常登录

密码或用户名有误

token拦截测试

使用后正常登录后获取的token

使用错误token

使用正常token但无访问权限

在写死的权限中只有test1、2、3的权限，而方法二权限为test10

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